Amr Taha, Ahmed M. Abd Alsamad, Hany Mahmoud Omar And Mushira M. Dahaba,

ABSTRACT

Objectives: Assessment Of The Accuracy Of Linear Measurements In Maxilla Obtained By CBCT Scanner (Planmeca Promax 3D MID CBCT Machine And Software) In Comparison With The Real Measurement Obtained From The Dry Skulls Methods: - The Study Was Performed On Thirty (30) Dry Skulls Obtained From The Anatomy Department Of Faculty Of Medicine, Cairo University. The Skulls Attached To Their Mandibles Were Radiographed Using Planmeca ProMax 3D Mid CBCT Machine. Real Measurements Were Performed Using A Digital Caliper. The Results Obtained Was Subjected To Intra- And Inter-observer Agreement Was Assessed Using Intra-Class Correlation Coefficient (ICC).Bland-Altman Plot (differences-vs-means Plot) Used To Show The Agreement Between Two Quantitative Measurements By Studying The Mean Difference And Constructing Limits Of Agreement .

Results: Excellent Correlation Was Shown Between The Maxillary CBCT Linear Measurements And Real Measurement Obtained From Dry Skulls. There Was Excellent Inter And Inter Observer Reliability. Conclusion:-Maxillary Linear Measurements Driven From CBCT Images Of Planameca Promax 3D Mid� Machine Are Accurate, Reproducible And Reliable For All Maxillofacial Applications.

Maha Sayed Mostafa Darwish Mohamed Galal Bihery , Mostafa Ibrahim Shendy And Ahmed Mohamed Salah,

ABSTRACT


Aim: Evaluation Of The Efficacy Of The Pre-shaped Resorbable Membrane On Increasing Height Of Atrophic Posterior Alveolar Ridge In Mandible VS Low Profile Titanium Mesh By Using CBCT Scan. Patients And Methods: The Study Was Conducted On 8 Bilateral Posterior Mandibular Sides Of Eight Patients Which Were Suffering From Severe Mandibular Atrophy. Each Patient Was Treated By Vertical Ridge Augmentation By Autogenous Cortico-cancellous Bone Graft Taken From Anterior Iliac Crest Of The Same Patient. In One Mandibular Side Of Each Patient Bone Graft Protected With Titanium Mesh (control Group) And The Other Side In The Same Patient Protected With Pre-curved Membrane (study Group).The Patients Were Followed Up For Six Months Postoperatively Clinically And By Cone Beam Computed Tomograms Immediately Postoperative, Which Represented The Base Line Radiographs And After Six Months, Bone Height Was Measured To Compare Amount Of Bone Resorption Of Both Groups.

Results: All Statistical Tests Were Two Sided And Performed At A Significance Level Of ^5; =.05 And By Using Student�s T-test (Student�s T-test: T = 2.414, P < .05). The Results Showed A Statistically Significant Difference Between The Resorption Rate RR Of The Vertically Augmented Alveolar Ridge Under The Membrane In The Study Group (n=8) And RR In The Control Group (n=8). The Results Showed Increase In Resorption Rate In The Study Group More Than The Control Group. Conclusion: The Resorption Rate In Augmented Bone Is Higher In Sides Where The Membrane Was Used Than The Sides In Which The Ti- Mesh Was Used Because The Membrane Loses Its Form And Its Rigidity By Humidity Before Consolidation Of The Augmented Bone.

Hend Mohammed Wagieh, Safa Fathy Abd El-Ghani And Asmaa Emad El-Din Mohammed,

ABSTRACT
Odontogenic Cysts And Tumors Have A Wide Spectrum Of Histopathologic And Clinical Characteristics, Ranging From Benign Non-invasive To Locally Invasive Or Malignant Lesions. However, Little Is Elucidated About Their Pathogenesis. The Aim Of Study Was To Evaluate The Immunohistochemical Expression Of Claudin-1 And Claudin-3 In The Most Common Odontogenic Lesions. Comparing The Expression Levels Of These Two Markers Among Those Lesions And Finally, Correlation Of The Obtained Results With Their Biological Behaviors Were Also Performed. Forty Archival Cases Of Radicular Cyst, Odontogenic Keratocyst, Unicystic Ameloblastoma And Ameloblastoma (10 Cases Each) Were Stained With Hematoxylin And Eosin For Histological Examination. Streptavidin-biotin Method Was Used For Immunohistochemical Staining By Anti Claudin-1 And Anti Claudin-3 Antibodies. Our Results Revealed That The Expression Level Of Both Markers Was Gradually Decreased Starting From Radicular Cyst To Odontogenic Keratocyst, Unicystic Ameloblastoma Until Reaching Its Lowest Value In Ameloblastoma. The Statistical Analysis Of The Current Work Revealed A Highly Significant Difference In Area Percentage Of Both Markers Among The Examined Groups. In Addition, The Area Percentage Of Claudin-1immunoexpression Was Much Higher Than That Of Claudin-3, And The Correlation Between Both Markers Was Positive. In Conclusion, Claudins-1 And -3 Could Be Useful Prognostic Biomarkers In Odontogenic Lesions. However, Claudin-1 Is More Specific For Odontogenic Lesions Than Claudin-3. Besides, They Could Aid In Differentiation Of The Neoplastic From Non-neoplastic Odontogenic Lesions And Could Be Auxiliary Indicators Of Aggressiveness And Invasion Potentials.

Mohamed A Mokhtar , Eman Anwar , Jylan El Guindy And Nadia Fahmy,

ABSTRACT

Objectives: The Goal Of This Study Was To Show The Bond Strength Of Contaminated Zirconia Copings Cemented With Ceramir Cement With And Without The Addition Of Ivoclean Cleansing Paste. Materials And Methods : 36 Zironia Copings Were Milled Using A Cad Cam Machine Were Divided In To 3 Equal Groups (n=12) To Be Cemented On Freshly Extracted Human Molar Teeth. Group 1: Group 1 (control): Ceramir Cement Was Placed On The Fitting Surface Of The Un-contaminated Zirconia Copings. Group 2: The Fitting Surface Of The Zirconia Copings Were Immersed In Human Saliva Cleaned Then Cemented With Ceramir Cement. Group 3: The Fitting Surface Of The Zirconia Copings Were Immersed In Saliva Then Cleaned Followed Applying Ivoclean Cleaning Paste On The Fitting Surface Then Cemented. All Samples Were Subjected To Thermocycling Followed By Pull Out Testing.

Results: No Significant Difference Was Found Between The Three Tested Groups Groups, Where Saliva Contamination Group Recorded 288.30 � 87.77 N , Ivoclean Group Recorded 312.13 �75.79 N And Control Group Recorded 324.79 � 81.84 N With A P Vale Of 0.588. Conclusion: Ceramir Cement Showed Minimal Reduction In Its Retentive Properties When In Was Subject To Saliva Contamination. Recommendation: Ivoclean Cleaning Solution Could Be Successfully Used To Improve The Retention Of Zirconia Crowns Cemented With Ceramir After Saliva Contamination.

Aya Abdelaziz Hamed, Mervat Rashed, Dalia Moheb And Ahmed Elkhadem,

ABSTRACT
Background/Objective: Traumatic Dental Injuries (TDIs) Of Permanent Teeth In Children Is A Significant Dental Public Health Problem Worldwide. This Study Aimed To Collect Data Regarding The Number Of Patients Presenting With TDIs, Teeth Affected And Type Of TDI In Children Attending The Pediatric Outpatient Clinic At Cairo University Over The Period Of One Year.

Materials and Methods: Children Aged 7-14 Years Presenting With TDI In The Year 2015 Were Examined. The Clinical And Radiographic Assessment Was Performed By One Calibrated Examiner. Andreasen Classification For TDIs Was Utilized. Further, An Interview-administered Questionnaire Was Carried Out With Parent/guardian. Chi-square And Fischer Exact Tests Were Used (P<0.05).

Results: Through Year 201), 4503 Children Were Examined. The Prevalence Of TDIs Was 7.7% (346 Children) With A Male To Female Ratio 1.6:1. Only 13.1% Of Children Presented Early Within 24 Hours. The Total Number Of Affected Teeth Was 526, Of Which 86% Of Traumatized Teeth Were Upper Central Incisors. The Most Common Dental Injury Was Enamel-dentin Fractures (40.9%) Followed By Complicated Crown Fractures (35%). Falls Accounted For (56.9%) TDIs Causes. Nearly Half Of TDIs (48.2%) Occurred At Home. Conclusion: The Prevalence Of TDIs In University Hospital Was Comparable To Other Studies. The Majority Of Children Presented Late. Therefore, Awareness Programs Need To Be Carried Out Regarding The Importance Of Emergency Care And The Advantages Of Early Treatment Of TDIs To Parents And School Teachers.

Marwa Al-Nawawy, Amr Zahran And Ahmad Reda,

ABSTRACT


Aim: This Study Aims At Evaluating The Efficacy Of PRF, As A Membrane, On The Amount Of Bone Fill In Dehiscence Defects, In Comparison To Collagen Membrane.

Materials and Methods: 20 Patients Were Selected And Randomly Assigned To Either The PRF Group (test) Or Collagen Membrane Group (control). The Dehiscence Defects Were Covered By Xenograft, Afterwards, The Selected Membrane Was Applied.

Results: At The Re-entry Surgery All Implants Were Clinically Osseointegrated. The Control Group Showed ? 60 % Defect Fill In 77.8% Of Cases, While In The Test Group Only ? 50% Defect Fill Was Achieved In 33% Of Group Cases. CM Group Showed Statistically Significantly Lower Mean Defect Surface Area Than PRF Group.

Conclusions: The Use Of PFR In GBR Procedures May Not Be Of Great Benefit. Further Research Work Is Recommended.

Manar M Abdel Zaher , Noha Ahmed Mansour And Mohammed Abdel Moneim Tawfic,

ABSTRACT
Background: Excessive Gingival Display (EGD) Commonly Referred To As A �gummy Smile� Can Be A Source Of Embarrassment For Some Patients.

Purpose: This Study Was Conducted To Evaluate Clinically, The Effect Of Lip Repositioning Surgery (LRS) Versus Botox Injection For Patients With Gummy Smiles (GS) As A Two Different Treatment Methods.

Materials and Methods: Twenty Healthy Female Patients With Age Range Of 18-35 Years Old And GD Range Of 3.5-9 Mm Were Selected For This Study. Patients Were Divided Into Two Equal Groups As Follow: Group (1): In Which Patients Were Treated Surgically By Lip Repositioning Technique, Group (2): In Which Patients Were Treated By Intramuscular Injection Of Botulinum Toxin Type A (BTX-A) At Pre-selected Sites. The Amount Of Gingival Display Was Evaluated At The Following Intervals, 2 Weeks, 1 Month, 3 Months, 6 Months, 9 Months And One Year.

Results: The Results Of This Study Showed Noticeable Reduction In The Amount Of Gingival Display For All Patients In Both Groups With No Significant Difference Between Them After 2 Weeks, 1 Month And Three Months Of Examination. After 6 Months Significant Difference Between Them Was Recorded As In Group (2) The Effect Of BTX-A Was Completely Disappeared While Patients In Group (1) Still Having Their EGD Reduced. Nine Months Later, The Effect Of LRS Also Had Been Disappeared And The Amount Of EGD Returned To The Baseline Value.

Conclusions: Both LRS And BTX-A Injection Are Effective Treatment Methods For Patients Suffering From EGD. The Results After Applying Both Modalities Are Transient, However LRS Has More Prolonged Results Than BTX-A.

Ahmed N. Elbolaty, Nadia A. Abbas And Nora M. Sheta,

ABSTRACT
Objective: In-vitro Study Was To Compare The Retention Between Two Types Of Esthetic Flexible Clasps. Acetal Versus Bre-flex2nd Edition Was Used In Bilateral Bounded Maxillary Removable Partial Denture Cases.

Materials and Methods: Standard Experimental Metal Model Of Maxillary Edentulous Case (Kennedy Class III With Modification I) Missing Right And Left Second Premolars And First Molars Was Fabricated To Be Used As Master Model To Simulate The Oral Cavity.Fourteen RPD Frameworks Were Fabricated Using Thermopress 400.Seven RPDs For Each Group,which Group (A) Acetal RPD And Group (B) Breflex 2nd Edition Each .Aker Clasp Design Was Engaged 0.02 Inch Undercut For All Clasps, Loop Was Centralized In The Major Connector. Digital Force Gauge Was Used For Both Groups To Measure The Retention.

Results: The Highest Mean Value Of Retention Was Found In Bre-flex2nd Edition (7.20 � 0.77), The Lowest Mean Value Of Retention Was Found In Acetal (5.97 � 0.75). Conclusion: It Was Concluded That The Mean Retentive Force Required To Remove The Acetal Clasp Was Found To Be Statistically Significant Lower Than This Required To Remove Bre-flex 2nd Edition Clasp.

Sara Mohamed Teama, Khaled Ezzat And Shaimaa Ismail Gawdat,

ABSTRACT


Introduction: The Objective Of This Study Was To Compare The Anesthetic Efficacy Of 2% Mepivacaine Combined With 100,000 Epinephrine With That Of 4% Articaine Combined With 100,000 Epinephrine For Inferior Alveolar Nerve Block During Access Cavity Preparation And Root Canal Instrumentation In Patients With Symptomatic Irreversible Pulpitis In Mandibular Molars, In A Randomized Clinical Trial. Participants And Methods: Sixty-six Patients With Irreversible Pulpitis Were Admitted To Outpatient Clinic Of Endodontic Department At The Faculty Of Oral And Dental Medicine, Cairo University Took Part In The Trial. Patients Were Randomly Allocated To One Of Two Equal Groups To Receive Inferior Alveolar Nerve Block Containing 3.6 ML Of 2% Mepivacaine With 100,000 Epinephrine Or 3.4 ML Of 4% Articaine With 100,000 Epinephrine. Root Canal Treatment Was Started At 15-minutes Post Injection In Presence Of Profound Lip Numbness And Completed In A Single Visit. Preoperative Pain, Pain During Access Cavity Preparation And Root Canal Instrumentation Was Recorded Using A Numerical Rating Scale (NRS).

Results: There Was No Statistically Significant Difference Between Anesthetic Efficacy Of Mepivacaine (36.4%) And Articaine (46.4%) Anesthetic Solutions. Regarding The Need For Supplemental Anesthesia, Both Mepivacaine And Articaine Anesthetic Solutions Were Similar And (48.4%) Of Patients In The Two Groups Needed Supplemental Anesthesia During The Treatment. Conclusion: Anesthetic Efficacy Of 2% Mepivacaine Was Similar To That Of 4% Articaine (both With 1:100,000 Epinephrine) In Inferior Alveolar Nerve Blocks. Neither Of Anesthetic Solutions Resulted In Effective Pulpal Anesthesia During Endodontic Treatment Of Mandibular Molars With Irreversible Pulpitis.

Maha Abd-ElSamad Ragheb El-Araby, Amira Fareed AlZogby, Heba Mohammed Taher And Amir Hafez Ibrahim,

ABSTRACT


Aim:The Aim Of This Study Was To Evaluate The Effect Of Finishing And Polishing Wheels And Disc On Surface Gloss Of Nano_filled And Micro_hybrid Resin Composite Restorations. Materials And Methods:Two Types Of Resin Composite Were Used Nano-filled Composite Resin (FiltekTM Z350 XT 3M ESPE) And Low Shrink Micro-hybrid Composite (FiltekTM P90 3M ESPE). A Total Of 90 Resin Composite Disks Of 10mm Diameter And 2mm Thickness Were Fabricated Using Specially Designed Split Teflon Mold. Specimens Were Finished And Polished Using Either Wheel (Sof-Lex Spiral Wheel 3M ESPE) Or Disc (Sof-Lex Discs 3M ESPE) Following Manufacturer�s Instructions Then The Specimens Will Be Subjected To PH Cycling Protocol. The Surface Gloss Of Resin Composite Specimens Was Measured Before And After PH Cycling Using Gloss Meter (HORIBA, Gloss Checker, IG 331, Japan). Scanning Electron Microscope (SEM) Analysis Was Performed To Show The Surface Aspects Of Resin Composite Before And After PH Cycling. Mann-Whitney U Test Was Used To Compare Between The Two Composite Types. Kruskal-Wallis Test Was Used To Compare Between Finishing And Polishing Techniques. Wilcoxon Signed-rank Test Was Used To Compare Between Gloss Values Before And After PH Cycling.

Results:There Was Statistically Significant Difference Between Two Types Of Composite And Between Two Finishing And Polishing Systems. Conclusion: It Was Concluded That The Best Gloss Was Produced In The Control Group (Mylar Strips) Among The Two Composite Resin Materials Tested. Nano-filled Resin Composite Produced Better Performance In Attaining And Retaining Gloss.

Mohamed Hosni El-Shamy, Khaled Atef El-Hayes, Nermeen Hassanien, Radwa Hamed Hegazy And Ahmed Abbas Zaky,

ABSTRACT


Aim: The Aim Of This Study Was To Assess The Effect Of Low Level Laser Therapy On Bone Healing Process Of Jaw Fractures In Respect To Rate Of Callus Formation For Minimizing The Time Of Fixation.

Materials and Methods: All Dogs Were Followed Up Clinically, Radiographically And Histologically After 3 Weeks For Group I And 6 Weeks For Group II, And Data Were Statistically Analyzed.The Radiographic Assessment Was Carried Out In Order To Monitor The Changes Within The Bone Density Along The Line Of Fracture To Both Sides Of The Mandible. There Was A Significant Increase In Bone Density In The Laser Sides (left Sides) Of Both Groups Comparing With The Control Sides (right Sides).

Results: The Histological Assessment Showed Increase In Amount And Thickness Of Woven Bone And Showed Completely Mature Well Organized Compact Bone To The Laser Applied Sides In Comparison With The Non-laser Sides (control Sides). The Results Revealed That There Was A Statistically Significant Increase In Bone Density Of The Laser Sides (left) In Comparison With The Non-laser Sides (right).

Conclusions: Low Level Laser Therapy Was Proved To Have The Ability To Assist And Accelerate The Healing Process Of Jaw Fractures. LLLT Has A Bio-stimulatory Effect On Osteoblast-like Cells After Laser Irradiation And So Shorten The Duration Of Fixation Of Fractured Bone.

Mohamed N. Abass, Enas Fathelbab And Yasser F. Hussein,

ABSTRACT


Purpose: The Aim Of This In Vitro Study Was To Evaluate The Effect Of High Concentrated Light Activated Bleaching Agent On Surface Roughness And Wear Resistance Of Conventionally And CAD � CAM Fabricated Feldspathic Ceramic Restorations.

Materials and Methods: A Total Of Forty Cubic Samples Were Prepared. Samples Were Divided Into Two Equal Groups (20 Samples Each) According To Type Of Tested Ceramic. Each Group Was Subdivided Into Two Subgroups (10 Samples Each) According To Type Of Testing. All Samples Subjected To 35% HP (BEYOND Max5�) Light Activated Bleaching Gel. Surface Roughness Measurements Were Recorded For All Tested Samples Before Any Treatment To Provide Baseline Values As A Control Group. A Micro-saw Was Used To Cut Blocks (VITABLOCS�MarkII) Into Standardized Cubes. A Specially Designed Acrylic Mold Was Used For Construction Of Samples To Standardize The Shape And Dimensions Of The Cubic Samples. Predetermined Proportions Of (VITAVM�7) Dentin Powder And Build Up Liquid Was Used According To The Manufacturer�s Instructions. Twenty Teeth Caries And Crack Free (premolars) Were Collected, A Micro-saw Used To Cut Teeth Into Equal Half In Vertical Section. All Samples Stored In Distilled Water Before And After Bleaching. Samples Of Both Types Of Ceramics Were Photographed Before And After Bleaching By USB Digital Microscope With A Built-in Camera For Surface Roughness Measurements. Wear Resistance Was Assessed By Weight Loss Of Tested Samples. Weight Was Measured By Electronic Analytical Balance. Chewing Simulator Device Was Used To Simulate The Vertical And Horizontal Movements In The Oral Cavity.

Results: Results Showed That There Was No Statistically Significant Difference Between Mean Values Of Ra Of The Two Tested Ceramic Types. However, Both Tested Materials Showed Statistically Significant Lower Mean Values Of Ra Than Tooth Structure But There Was No Statistically Significant Difference Between Changes In Surface Roughness (?Ra) In The Three Groups Either Before Or After Bleaching. There Was No Statistically Significant Difference Between Mean Values Of Wear Of The Two Ceramic Types. The Wear Ranged (0.49 To 72) The Maximum Wear Was Found In (VM 7) While The Lowest Was In Tooth Structure. That Was Interesting To Find That The Wear Of Tooth Structure (0.42) Which Is Significantly Less Than Two Types Of Dental Ceramics.

Conclusions: High Concentrated Light Activated Bleaching Agents Have No Effect On Surface Roughness And Wear Resistance Of Dental Ceramic. Both Types Of Dental Ceramics (fine Structure Feldspathic Porcelain) Have Mild Abrasive Effect On Antagonist Natural Teeth. Industry Manufacture Dental Ceramics Showed More Wear Resistance Than Conventional One.

Bakr Akram Saber Al-Alousi , Ali Ali Mortada And Manal Ahmed El Sheikh,

ABSTRACT
The Aim Of The Study Was To Evaluate Caries Prevalence, Oral Hygiene Measures, Dietary Habits And Dental Care Among (6-12 Years Old) A Group Of Iraqi Children In Erbil Governorate Compared With A Similar Group Of Egyptian Children At Same Age In Cairo Governorate. Subjects And Methods : This Study Was Planned To Assess Prevalence Of Dental Caries Among A Group Of 6-12 Years Old Iraqi Children In Northern Of Iraq Represented By Erbil Governorate Compared With A Similar Group Of Egyptian Children At Same Age In Cairo Governorate. Four Public Primary Schools Were Selected From Erbil City And Outpatient Clinics Of Pediatric Dentistry And Dental Public Health Department, Cairo University From Cairo City Were Included. This Observational Study Was Carried Out On 1340 Children, Divided According To Geographic Location Into 2 Groups; 670 Children Were Iraq Study Group Children, While 670 Students Were Egypt Study Group Children.

Results: Data Were Collected Through A Questionnaire-based Survey. Structured Close Ended Questionnaire Used To Assess Their Ages, Gender, Eating Habits, Oral Hygiene Measures, And Frequency Of Dental Care. All Children Participated In This Study Were Examined For: Dental Caries Experiences In Primary And Permanents Teeth Using Def And DMF Indices.

Rehab Ali Abd ElGany Hassan, Maged M Negm And Reham Seyam,

ABSTRACT
Objective: This Study Aimed To Evaluate The Adaptability, Bioactivity And PH Of Endosequence BC Sealer (BC Sealer) And Biodentine Calcium Silicate Based Materials In Comparison To The Gold Slandered AH Plus Sealer, A Resin Based Sealer. Methods: Fifteen Extracted Human Anterior Teeth Were Prepared For Adaptability Evaluation Using Ni-Ti ProTaper Rotary Files. Teeth Were Randomly Allocated Into Three Groups (n=5/ Each Material). Group 1and 3 Roots Were Obturated Using F5 Gutta-percha Cones With Endosequence BC And AH Plus Sealers Respectively, While In Group 2 Roots Were Obturated By Biodentine. Obturated Roots Were Stored At 37? In 100% Relative Humidity For 7 Days, And Then Root Dentine To Material Interface Was Examined For Gaps Formation Using Scanning Electron Microscope. To Determine Bioactivity Thirty Root Sections Were Filled With One Of The Materials (n=10/ Each Material) And Immersed In PBS For 7and 30 Days (n =15/ Each Period). Ca- And Si-incorporation Amount Into Adjacent Dentine Was Measured Using An Energy Dispersive X-ray Analysis. For PH Investigation Thirty Root Sections Were Prepared As Mentioned In Bioactivity Evaluation Then Immersed In PBS Or Butyric Acid For 7 Days (n = 15/ Each Media).

Results: Endosequence BC And AH Plus Showed More Gaps Compared With Biodentine, With No Significant Differences Among Them. Biodentine Released More Ca- And Si And Presented More Alkaline PH Followed By Endosequence BC, While AH Plus Showed The Lowest PH And Ion Release.

Conclusions: Biodentine Was Better Than Endosequence BC And AH Plus In Adaptability, Bioactivity And PH. So It Is Indicaed In Cases That Require Healing.

Nada M. Salem, Mohamed A. F. Kaddah, Mona M. Salah Fayed And Fady Hussein Fahim,

ABSTRACT
Aim Of The Study: To Compare The Two Used Methods Of Indirect Bonding Regarding (Vinyl Polysiloxane VPS Tray And A Soft Vacuum-formed Tray) The Patient�s Satisfaction During The Bonding Procedure.

Materials and Methods: A Randomized Controlled Trial Was Performed, 21 Subject With Fully Erupted Upper And Lower First And Second Permanent Molars Showing No Signs Of Enamel Defects Or Signs Of Gingival Inflammation Were Recruited In This Study. 168 Attachments Were Bonded To First And Second Molar Teeth. A Questionnaire Was Given To Each Subject To Measure Their Satisfaction Towards The Used Indirect Bonding Trays. After Placement Of Molar Tubes On The Working Model, A Vinyl Polysiloxane VPS Tray And A Soft Vacuum-formed Tray Were Fabricated, One On Each Half Of The Working Model, Then The Tubes Were Transferred To The Patient�s Dentition. Conclusion: The Vinyl Polysiloxane (VPS) And The Vacuum-formed Trays Used To Indirectly Bond Orthodontic Attachments Were Found To Be Equally Satisfying To The Patient.

Hossam Maher Mahmoud, Hatem. E. Amin, Olfat. M. Gaballah And Hussein. I. Saudi,

ABSTRACT
Background: There Are Many Tools For Identification Of Human Remains, Via Radio Graphical Imaging, Histological Processing & Microscopical Examination Of Dental Remains.

Purpose: To Assess And Compare The Accuracy Of Cemental Annulations And Con Beam Computed Tomography For Age Estimation Among Adults

Materials and Methods: One Hundred And Twenty Intact, Non-carious And Single Rooted Extracted Teeth Were Evenly Distributed According To Gender And Different Age Groups In To Four Groups. Each Group Contained 30 Extracted Teeth (10 Incisors, 10 Canines And 10 Premolars).The Ages Of The Patients Ranged From 30 To 69 Years Old. All The Examined Teeth Were Imaged By A Cone Beam Computed Tomography Scanner And Examined By Cemental Annulations

Results: For All Participants, In Total And In The Age Group Between 30 To 50 The Mean Differences Between Chronological Ages And Dental Ages Estimated By Cone Beam Were Significantly Higher Than The Corresponding Values Of The Mean Differences By Cemental Annulations While There Were No Significant Difference In The Age Group Between 50 To 69. Conclusion: For Total Participants, Teeth Cemental Annulations Method Is More Accurate Than Cone Beam Computed Tomography For Dental Age Estimation In Adult. Considering Gender, Cemental Annulations Method Is A More Accurate Age Predictor Than Cone Beam Computed Tomography Among Males And Total Female Participants. Regarding Teeth Type, Cemental Annulations Method Is A More Precise Age Estimation Tool For Premolars With Equal Accuracy Of Both Methods For Incisors And Canines.

Yasser Arafat Hassanin Amin, Basma Gamal Moussa And Nesrine Khairy,

ABSTRACT
The Aim Of The Study : Evaluation Of The Osseointegration Of Direct Laser Metal Forming Immediate Implants For Replacement Of Upper Anterior Teeth.

Materials and Methods: Twelve Patients With A Need For Upper Anterior Teeth Replacement Was Randomly Assigned To Be Treated With Direct Laser Metal Forming (DLMF) Immediate Implant (Tixos). Implants Were Loaded After 6 Months Of Placement. The Follow Up Was Clinical Evaluation Included (Bleeding On Probing, Pocket Depth, Plaque Index ,Gingival Index), A Comparison Table Between One Week After Loading And 6 Months After Loading. Radiographically A Cone Beam C.T Was Taken After 1 Week Of Placement And 6 Months Of Placement Were Evaluated For Change In Relative Bone Density Adjacent To The Implants. Results : All Implants Showed Initial Primary Stability And Good Signs Of Osseointegration With Absence Of Any Signs Of Failure. The Clinical Evaluation Was Enhanced After 6 Months Of Loading Comparing To 1 Week After Loading. The Mean Relative Bone Density Increased After 6 Months Of Implant Placement Comparing To One Week After Placement. Conclusion : All Twelve Implants Have Been Successfully Present In The Bone And Completely Osseointegrated By Complete Bone Formation And Density Around All Implants That Can Function With Good Esthetics.

Marwa Hassan Mostafa ,, Ali Abdulghani AlSourori, Amal Fathy Kaddah, Magda Ismail Ramzy, Ahmed Emad Fayyad And Wessam M Dehis,

ABSTRACT


Purpose: The Aim Of This Study Was To Evaluate Implant Stability In Single Implant Versus Two Implant Mandibular Over-denture Of Completely Edentulous Patients.

Materials and Methods: Twenty Four Completely Edentulous Patients Were Divided Randomly Into Two Groups, Intervention Group Received Single Implant Supported Overdenture, While The Conventional Group Received Two Implant Supported Over Denture. Osstell Device Was Used To Measure Implant Stability. Implant Stability Was Measured Equally For The Two Groups. At First Primary Stability Was Measured At Time Of Implant Insertion After That Secondary Implant Stability Was Measured Every Three Months Up To Nine Month

Results: Comparing The Two Groups During The Whole Study Period, The Results Demonstrated That No Differences In Implant Stability Between Two Groups. (P Value < 0.05) Conclusion Regarding Initial And Delayed Implant Stability, Minor Changes Were Observed Between The Two Groups During The Whole Follow Up Periods. Implant Stability Of Single Implant Supported Over Denture Is Closer To Two Implant Supported Over Denture.

Marwa Abd El-Aziz Abd El-Wahab El-Sayed, Zeinab Ahmed Hussein El-Shorbagy And Manal Ahmed El-Ebiary And Emad Abd-Allah Mabrouk,

ABSTRACT


Purpose: The Aim Of This Study Is To Compare Acrylic, Acrylic Reinforced With Glass Fibers And Flexible Acrylic Denture Base For Single Implant Overdentures Retained By Ball And Socket Attachment.

Materials and Methods: It Was Classified Into 3 Equal Groups According To The Tested Materials. Fratigue Test Was Made For All Samples Of The Three Groups. The Dental Implant Was Embeded Vertically In The Middle Of A Cold Cured Acrylic Resin. Ball And Socket Attachment Was Used. Specimens 60 Mm Long, 1.5 Mm Thick, And 10 Mm Wide Was Fabricated From Baseplate Wax. Fabrication Of Conventional Acrylic Resin And Acrylic Resin Reinforced With Glass Fibers Samples: Chopped Glass Fibers Were Added In Concentration 5 % By Weight. Heat Polymerized Denture Base Resin Was Used According To The Manufacturer,s Instructions To Pack The Flasks. Fabrication Of Nylon Samples: Investment Is Done In A Special Flask. Deflasking Is Completed And Specimens Were Finished And Polished.

Results: It Was Found That Conventional Group Recorded The Highest Number Of Cycles Mean Value Followed By Flexible Group While Fiber-reinforced Acrylic Group Recorded The Lowest Number Of Cycles. It Was Found That Conventional Group Recorded The Highest Fatigue Strength Followed By Fiber-reinforced Acrylic Group While Flexible Group Recorded The Lowest Cyclic Flexure Strength Mean Value. The Result Of This Study Show That No Breakage Occurs To The Flexible Samples. Conclusion: Conventional Group Recorded The Highest Fatigue Strength Then Fiber-reinforced Acrylic Group Followed By Flexible Group.

Mohamed A. Bassyouni, Ahmed El Barbary And Amr Zahran,

ABSTRACT
Objective: To Compare The Amount Of Periimplant Defect Reduction (VDD And HDD) And Buccolingual Dimension Reduction With And Without The Placement Of Beta Tricalcium Phosphate Into The Buccal Periimplant Defect Following Implant Installation Into Fresh Extraction Socket. Materials And Methods:16 Implants Were Placed Into 16 Patients, 8 Implants In The Test Group (grafted) And 8 Implants In The Control Group (non-grafted). Buccolingual Dimension Was Measured On The Preoperative CBCT, While The Horizontal And The Vertical Defect Dimension Were Measured Clinically Using A UNC Periodontal Probe Following Immediate Implant Placement. After 6 Months Of Healing, A Second CBCT Was Taken For The Evaluation Buccolingual Dimension Reduction And The Implants Were Exposed Using ��M�� Flap Technique For Direct Bone Measurements. In The Test Group, The Defects Were Completely Filled While In The Control Sites, There Was Variability In The Amount Of Bone Fill. Results : Regarding The Change In The Buccolingual Dimension, Results Showed That There Was Statistically Significant Difference Between Groups. The Reduction In The Vertical (VDD) And Horizontal (HDD) Defect Dimension Was Statistically Significant In Each Group Between The Baseline And The Re-entry After 6 Months And Between Groups After 6 Months. Conclusion: Although The Placement Of Biosorb (?-TCP) In The Buccal Peri-implant Defect Did Not Counteract The Bone Dimensional Alteration After Tooth Extraction And Immediate Implant Installation, It Contributed To Decreasing The Magnitude Of Buccolingual Dimension Reduction. Both Treatment Approaches Produced Significant Reduction In The Vertical As Well As The Horizontal Periimplant Defect Dimension. However, The Placement Of The Bone Graft Into The Buccal Peri-implant Defect Produced Better Bone Fill Compared To Spontaneous Healing Of The Defect.

Mostafa Saad Swedan, Amal Fathy Kaddah And Ahmed Emad Fayyad,

ABSTRACT

Objectives: Telescopic Denture Have Been Documented To Retain Dentures More Effectively Than The Conventional Claps System Because Of Their Ability To Transmit Occlusal Loading To The Long Axis Of The Abutment Tooth And To Provide Guidance, Support And Protection From Movement. Nowadays, The CAD CAM Technology Became One Of The Most Important Developments Happened In The Dental Field At The Twenty-one Century. Consequently, All Dental Labs Started To Shift Their Services To The Digital Manufacturing Where Less Material Consumed, Saving Time And Effort And Capability Of Mass Production CAD/CAM Technologies Can Be Successfully Applied In The Fabrication Of Removable Partial Denture Alloy Frameworks. The Aim Of This Study Was To Evaluate The Patient Satisfaction And Biting Force In In Partially Edentulous Patients With Mandibular Distal Extension Removable Partial Dentures Retained By CAD-CAM Designed Telescopic Crowns In Comparison To That Retained By Conventional Clasps. Methods: This Study Was Conducted On Forty Two Patients To Evaluate Two Treatment Modalities Used For Rehabilitation Of Mandibular Distal Extension Cases To Study The Effect On Biting Force And Patient Satisfaction. At The Beginning, All Selected Patients Were Introduced To A Randomization Process To Be Divided Randomly Into Two Groups Identical In Number 21 Patient In Each Group. First Group: (intervention Group) The Patient Received Mandibular Telescopic Partial Dentures Designed By CAD/CAM System. Second Group: (control Group) The Patient Received Mandibular Removable Partial Dentures Designed By CAD/CAM System.

Results: Telescopic RPD Group Recorded Statistically Significant Improvement When Compared To Clasp Retained RPD At Three And Six Months Follow-up Periods. P Value < 0.0001 And Also This Group Showed Statistically Significant Improvement Of The Biting Force Compared To That Of Clasp Retained RPD Group At All Follow-up Periods. (P<0.05). Conclusion: Both Treatment Groups Improve Patient Satisfaction And Biting Force But The Biting Force Produced By Telescopic Mandibular Denture Greatly More Than Produced By Mandibular Removable Partial Denturesand Also Patient With Telescopic Dentures Were More Satisfied Regarding Denture Stability And Chewing Ability Items Than With Removable Partial Denture.

Salah El-Din M. Harraz , Nader N. Elbokle And Mohammed M. Khashaba,

ABSTRACT


Purpose: This Preliminary Study Was To Evaluate Clinically And Radiographically The Volume Changes Of Alveolar Bone Grafting Guided By Resorb-x Membrane. Patients And Methods: A Total Of Six Patients With Maxillary Anterior Localized Alveolar Ridge Defects ? 3 Mm Were Selected. The Alveolar Ridges Were Reconstructed With Xenogeneic Bone Graft Particles Guided By Resorb-x Membrane. Linear Measurements And Volume Analysis Of The Changes In Alveolar Ridge Were Obtained Pre-operatively And Four Months Post-operative Using Cone Beam Computed Tomography (CBCT).

Results: Four Months Postoperatively, All Treated Defect Sites Exhibited Satisfactory Bone Formation. Clinical Results Showed Absence Of Any Foreign-body Reactions To Biodegradation Of Resorb-x Membrane And SonicPin Rx�. Measurements Made On CBCT, Four Months Postoperative Showed Statistically Significant Increase In Bone Width With Mean � SD: 2.37 � 1.77 Mm At 2 Mm, 2.46 � 1.56 Mm At 4 Mm, 2.36 � 1.05 Mm And 1.63 � 0.83 Mm At 8 Mm From Crest Of Alveolar Ridge Respectively. There Was Statistically Significant Increase In Bone Volume By 36.15% In The Area Of Newly Formed Bone. No Statistical Significant Changes Was Found In The Density Of Newly Formed Bone When Compared To The Density Of The Native Bone Four Months Post-operatively. Conclusion: The Resorb-x Membrane Is An Improvement In The Search For A Mechanically Strong And Stiff As Well As A Biodegradable System. With Such Modifications In Properties, This Gives Resorb-x Membrane More Promising Chances To Be Used In Guided Bone Regeneration.

Sylvia M.S. Iskandar, Iman A. Radi , Nouran Abdel-Naby And Assmaa Gad Allah,

ABSTRACT
Dental Implants Offered Variety Of Solutions For Retention And Stability Problems Associated With Partial And Complete Dentures. Bone Quality And Quantity Are Critical Factors For Both Implant Placement Decision Making And Its Prognostic Consequences. Low Bone Density (osteoporosis) Affects More Than 200 Million Women Worldwide Aging Between 60 And 90 Years Old. Critical Summary For A Recent Systematic Review Which Was Conducted To Evaluate Implant Failure Related To Low Bone Density (osteoporosis), Which Proved The Review To Be Of No Clear Evidence , However, Due To Inherent Limitations Of The Previous Systematic Review And Availability Of New Studies As Well As Comparing Between Different Techniques, Conducting The Current Systematic Review Was Mandatory. There Are Two Objectives For This Systematic Review: First To Explore The Success Of Implants In Low Bone Density Patients If Compared To Normal Bone Density Ones. Second To Compare Conventional And Special Techniques Used In Literature To Manage Implant Patients With Low Bone Density To Enhance The Success Of The Dental Implant.

Esraa Hashem, Ghada I. Shehab And Hanaa I. Sallam,

ABSTRACT
Purpose. The Purpose Of This Study Was To Assess The Vertical Marginal Gap Distance Of The IPS E.max Ceramic Copings As Affected By Finish Line Steepness And Construction Technique. Material And Methods. Fifty Four IPS E.max Ceramic Copings Were Fabricated With 2 Different Construction Techniques On Two Nickel Chromium Dies With 2 Different Finish Line Steepnesses (1 And 3 Mm). Copings Were Divided According To Their Construction Technique Into Two Main Groups: Group I : Machinable All Ceramic Copings And Group II : Heat Pressed All Ceramic Copings. Each Group Was Further Subdivided Into Two Subgroups According To Different Finish Line Steepness: Subgroup 1: 1-mm Finish Line Steepness And Subgroup 2 : 3-mm Finish Line Steepness. The Vertical Marginal Gap Distance Was Measured Using A Stereomicroscope, And Data Were Statistically Analyzed Using 2-way ANOVA Followed By Pair- Wise Tukey�s Post-hoc Tests. Results. IPS E.max Ceramic Copings Constructed By CAD/CAM Technology With 3 Mm Finish Line Steepness Recorded The Highest Statistically Significant Vertical Marginal Gap Distance Mean Value (111.01 � 8.05�m), While Copings Constructed By Heat Pressed Technique With 1 Mm Finish Line Steepness Recorded The Lowest Statistically Significant Vertical Marginal Gap Distance Mean Value (26.06 � 3.9 �m) Among The Tested Groups . Pair-wise Tukey�s Post-hoc Test Showed That There Was No Statistically Significant Difference Between Copings Constructed By Heat Pressed Technique With 1 Mm And 3 Mm Finish Line Steepness (P=0.329). Conclusion. Increasing The Finish Line Steepness Significantly Increases The Vertical Marginal Gap Distance Especially With CAD/CAM Construction Technique. The Construction Technique Significantly Affected The Vertical Marginal Gap Distance Of IPS Emax Ceramic Copings, With The Superiority Of The Heat Pressing Technique. Clinical Implications. IPS E.max Press Is More Reliable Than IPS E.max CAD For Preparations And Restorations Of Teeth With Increased Degree Of Finish Line Steepness.

Amr Ali , Adel El Tannir And Maha Ahmed Taymour,

ABSTRACT
Systems Imply None Or Minimal Influence Of The Dental Laboratory Technician. However, It Is Not Clear Wether Metal Ceramic Restorations Produced By CAD/CAM Systems Show Comparable Adaptation To Those Produced By The Dental Laboratory Technician.

Purpose: This Study Evaluated And Compared The Marginal Gap And Internal Adaptation Of Metal Copings Produced By Four Techniques: Conventional Waxing Technique (CW), Milled Metal Technique (MM), Milled Wax Technique Followed By Conventional Casting (MW1), Milled Wax Technique With Margination Followed By Conventional Casting (MW2)

Materials and Methods: A Master Metal Die Of A Maxillary First Molar Prepared With Chamfer Finish Line Was Produced, Forty Stone Dies Were Poured From Impressions Of The Master Die And Were Randomly Assigned To Each Of The Study Groups (n=10), Metal Copings Were Then Fabricated According To The Study Groups (CW, MM, MW1, MW2). The Metal Copings Were Seated On The Master Metal Die And Held In Place By A Spring Holding Device And The Vertical Marginal Gap Was Measured By A Stereomicroscope Under 10x Magnification At 40 Predetermined Points For Each Specimen. The Internal Gap Was Measured Using The Replica Technique At 7 Predetermined Points For Each Specimen. One Way ANOVA Was Used To Compare Between The Four Groups Followed By Tukey Post Hock Test.

Results: The Least Marginal Gap Was Recorded By The MW2 (47.5 � 3.7�m) With Significant Difference (P<0.05) To The CW (55 � 5.4�m) And MM (60.5 � 7�m Groups) While There Was No Significant Difference With MW1 (50.3 � 5�m). The Internal Gap Results Showed No Significant Difference (P>0.05) Between The Studied Groups With The Least Gap Recorded By MM Group (127 � 42�m). All Results Were Within The Clinically Acceptable Range. Conclusion: CAD/CAM Can Be Used In The Production Of Metal Copings As An Efficient, Time Saving And Aseptic Alternative To Conventional Casting As It Produces Copings With Clinically Acceptable Marginal And Internal Adaptation Values.

Ghada Gamal Adayil, Manal Mohamed Hosny, Dalia Yehia Ibrahim Ahmed Zaki And Mai Zakaria Ibrahium Mohammed,

ABSTRACT

Objectives: To Study The Effects Of Maxillary Sinus Floor Elevation Using Bovine Bone Xenograft Scaffold In Rabbits.

Materials and Methods: Twelve Male Rabbits That Had Undergone Sinus Lift Procedures Were Divided Into Two Groups, According To The Time Of Euthanasia: Group 1: After One Month And Group 2: After Two Month.

Results: The Augmented Maxillary Sinus Height Was Maintained For Both Groups Over The Entire Experimental Period, While New Bone Area Increased Over Time.

Nermeen Awadallah Abbas Ibrahim, Suzan Abdul Wanees Aminand Shaimaa Ismail Gawdat,

ABSTRACT


Aim: The Aim Of This Prospective, Randomized, Double-blind, Clinical Trial Was To Evaluate The Effect Of A Preoperative, Single, Oral Dose Of Aceclofenac (100 Mg) On Postoperative Pain At 6, 24 And 48 Hours After Single-visit Root Canal Treatment. Methods: Seventy, Endodontic Emergency Patients With Symptomatic Irreversible Pulpitis (SIP) In Posterior Teeth, Randomly Received Either 100 Mg Aceclofenac (Group A, N=35) Or Placebo (Group B, N=35) Tablets 60 Minutes Before The Initiation Of Single-visit Endodontic Therapy. Postoperative Pain Intensity And Incidence At The Different Pain Categories (No, Mild, Moderate, Severe) Was Assessed 6, 24, And 48 Hours Postoperatively Using Heft-Parker Visual Analogue Scale (HP-VAS). Data Were Statistically Analyzed And The Significance Level (?) Was Set At 0.05.

Results: There Was No Significant Difference Between The Two Groups Regarding The Main Baseline Characteristics Including: Age, Gender, Pre-operative Pain And Canal-number Distribution (p>0.05). Results Showed No Significant Difference Between Both Groups Regarding Postoperative Pain Intensity Or Incidence 6, 24 And 48 Hours Postoperatively (p >0.05). Pain Intensity Significantly Decreased Over Time (p<0.05) Conclusion: Preoperative Administration Of A Single, Oral Dose Of 100 Mg Aceclofenac Did Not Seem To Affect The Postoperative Pain Within The First 48 Hours After Single-visit Root Canal Treatment.

Mona E. Shabana, Salma H. Al-Ashry And Ahmed M. Ghobashy,

ABSTRACT
Objective: The Aim Of The Current Study Was To Compare Between Rotation Motion (ProTaper Universal And ProTaper Gold) And Reciprocation Motion (WaveOne And WaveOne Gold) In Shaping Ability Of Curved Root Canal By Assessment Of Canal Transportation, Centering Ability And Remaining Dentin Thickness And Changes In Canal Curvature Using CBCT Methods: Forty Extracted Human Mandibular First Molars With Mesiobuccal Canal Curvature Ranged 20-35 Degrees Were Used In The Study. Decoronation Of The Teeth At 15 Mm Length Each Tooth Was Radiographed From The Buccal View With #15 K-file Inside The Mesio-buccal Canal Adjusted To The Apical Foramen Using Vista Scan Digital X-ray Machine And Schneider Angle Was Measured. Teeth Will Be Classified Into Two Main Groups Group I With 20 Teeth For Rotation Motion And Group II For Reciprocation Motion. Each Group Will Be Further Subdivided Into Two Subgroups According To The Type Of File System .Sub Group A For Universal System And Group B For New System. Group I: Ten Teeth Were Shaped Using PU For Subgroup A And Another Ten Teeth Were Shaped Using PTG For Subgroup B According To The Manufacture Instructions And Ending Up To File F2. Group II Subgroup A And Subgroup B Ten Teeth Were Shaped Using Primary WO 25/.07 With X Smart Plus Motor In Subgroup A, Another Ten Teeth Were Shaped Using Primary WOG 25/.08 With X Smart Plus Motor With Wave One Gold Setting In Subgroup B. Both Systems Were Used According To Manufacturer Instruction. Using Cone Beam Computed Tomography With Fused Image, Subtracting The Un-instrumented Dentin From The Instrumented Canal Using On Demand3D Software, Axial Cuts Were Carried Out At 3mm, 5mm And 7mm In The Root. Assessment Of Degree And Direction Of Transportation, Centring Ability And Change In Canal Curvature Was Done Using CBCT. Data Were Collected, Tabulated And Statistically Analyzed In Tables And Figures. Friedman�s Test Was Used To Compare Between The Different Levels Within Each System. Dunn�s Test Was Used For Pair-wise Comparisons When Friedman�s Test Is Significant.

Results: In BL Direction, At 5 Mm Root Level, ProTaper Gold Showed The Statistically Significantly Highest Mean Centering Ratio, While ProTaper Universal Showed The Statistically Significantly Lowest Mean Centering Ratio. There Was No Statistically Significant Difference Between The Four Systems Regarding Change In Canal Curvature Conclusion: The Two Motions Were Comparable As Regards To The Amount Of Dentin Removal, Except At 7 Mm, Reciprocation Revealed Lower Mean Value.As Regards Transportation Direction, The Four Systems Had A Tendency Toward Transportation To The Mesial Direction.Reciprocation Motion Exhibited Superior Performance Compared With The Rotation Motion In Transportation At 7 Mm The Four Different File Systems Straightened Root Canal Curvature Similarly.

Amr Helmy El Bolok, Enas Alaa El Din Abd El Aziz, Mai Ibrahim Sholqamy And Sara Moustafa Mahmoud,

ABSTRACT
Aim Of Study: To Investigate The Expression Of Ki-67 And Midkine In Salivary Gland Tumors And Evaluate The Correlation Between MK And Ki-67 Expression In SGTs.

Materials and Methods: Twenty Five Formalin Fixed Paraffin Blocks Of SGTs Were Stained Immunohistochemically For Ki-67 And MK. Immunostainig Was Measured As Area Fraction And Results Were Analyzed Statistically. Value <0.05 Was Considered Significant.

Results: All Cases Of SGT Showed Positive Reaction To Ki-67 And MK. A Significant Positive Correlation Was Found Between Ki-67 And MK Expression In SGTs. Conclusion: MK And Ki-67 Expression Are Higher In Malignant Than Benign Salivary Gland Tumors, So Evaluation Can Provide Information About Aggressiveness Of The Tumor.

Ahmad K. Mubarak, Manal R. Hassan And Mohammed M. Shalaby,

ABSTRACT
Aim Of The Study: The Aim Of This Study Was To Investigate Fracture Resistance Of Maxillary Posterior Fixed Partial Denture Constructed On Mutilated Abutments Using Finite Element Analysis.

Materials and Methods: Twenty Four 3 Units �3-Y-PS Zirconia� Fixed-fixed Partial Dentures Were Constructed On 48 Uniformly Prepared Abutments (24 Maxillary Second Premolars+24 Maxillary Second Molars). The Zirconia Fixed-fixed Partial Dentures Were Divided According To The Vitality Of The Adjoing Abutments Into Two Main Groups. Group (A): The Adjoining Abutments Were Non Endodontically Treated That Restored With Composite Cores. Group (B): The Adjoining Abutments Were Endodontically Treated Restored With Glass Fiber Posts Cemented With Rely X Cement And Composite Cores Build Up. Each Group Of (A) And (B)were Subdivided Into: Control Group (sound Abutments With No Missed Wall) And Experimental Group. The Experimental Group Consisted Of 3 Subgroups; One Wall Missed (A1 Or B1), Two Walls Missed (A2 Or B2) And Three Walls Missed (A3 Or B3). A Vertical Compressive Load With 3mm Diameter Indenter Was Applied To The Central Fossa Of The Pontic Using Universal Testing Machine. A 5Kg Load Was Applied At A Crosshead Speed Of 1mm/min Until Fracture Occurred. A Finite Element Models Were Conducted To Study Stress Distribution On The Component Of The Fixed-fixed Bridges Of All Studied Groups And Subgroups , Besides, Comparing Between Zirconia And Lithium Disilicate Ceramics(E Max) As Different Bridge Construction Materials.

Results: The Highest Fracture Resistance Mean Value Was Recorded For The Control Group Of The A Abutments (Ac)(3095.22 �284.94N). The Fracture Resistance Means Of The Subgroups Were Recorded As A1(2978.52N)>Bc(2897.1N)>A2(2687.13N)>B1(2341.29N)>B2(2118.76)>A3(1943.32N)>B3(1921.79N). While The Lowest Fracture Resistance Mean Value Was Recorded For B3subgroup (1921.79 �75.26N) Which Is The Non Endodontically Treatd Abutments With 3 Missing Walls (the Most Mutilated Subgroup). Conclusion: The Fracture Resistance Of The Fixed-fixed Partial Denture Was Directly Proportional To The Adjoining Abutments Existing Walls Number. The Zirconia Material Enhanced The Fracture Resistance Of The Fixed Prosthodontics Due Toitshigher Ability For Stress Distribution Than The Lithium Di-silicate Ceramics(E-Max).

Doha Mohammed Afifi, Amal Hassan Abdel-Rahman And Heba Mahmoud Dahmoush,

ABSTRACT
Background: Oral Squamous Cell Carcinoma Is A Malignant Tumor With Poor Prognosis And Therefore The Discovery Of Markers For Early Signs Of Malignant Transformation Would Be Of Critical Importance In Clinical Diagnosis. In This Study We Aimed To Detect The Changes In ANXA1 Immunoexpression In Tissues Of Normal Rat Tongue Mucosa And In Induced Dysplasia And OSCC.

Materials and Methods: 25 Rats Were Used, Divided Into 2 Groups: A Control Group (5 Rats With No Induction) And Experimental Group (20 Rats Which Received Topical Painting Of DMBA And Formaldehyde For Induction Of Dysplasia And SCC). Tongue Dissection Was Performed At Euthanization Dates. Area Percent Of Immunohistochemical Expression Of ANXA1 Was Measured By Software Leica Qwin 500.

Results: ANXA1 Was Expressed In The Cell Membrane Of Normal Tongue Mucosa And Loss Of This Expression Was Frequent In Both Dysplasia And OSCC. A Statistically Significant Difference In ANXA1 Expression Was Present Between Normal Tongue Mucosa And Dysplastic Lesions Or OSCC. Conclusion: ANXA1 Immunostaining Has A Potential Utility For The Detection Of Epithelial Dysplasia.

Mohammed Fawzy Habib, Manar Fouda And Shaimaa Ismail Gawdat,

ABSTRACT


Aim: The Study Was Designed To Compare The Anesthetic Efficacy Of 2% Mepivacaine With 1:100000 Epinephrine To That Of 4% Articaine With 1:100000 Epinephrine In Inferior Alveolar Nerve Block Injection For Mandibular Molars With Symptomatic Irreversible Pulpitis. Methods: 66 Patients With Symptomatic Irreversible Pulpitis In Their Mandibular Molars Were Randomly Allocated To Two Groups Receiving IANB Injection Of Either 2% Mepivacaine With 1:100 000 Epinephrine Or 4% Articaine With 1:100 000 Epinephrine. Patients Were Asked To Rate Their Pain Level On A Number Rating Scale (NRS) During Access Cavity Preparation And Root Canal Instrumentation. Patients Who Reported No Or Mild Pain During The Two Procedures Were Considered Successfully Anesthetized, Otherwise The Case Was Considered Anesthetic Failure. Chi Square Test Was Used To Compare The Outcomes Between The Two Groups.

Results: Anesthetic Success Of The Mepivacaine Group Was (33.3%) While That Of Articaine Was 45.5%. The Difference Between The Two Groups Was Not Statistically Significant (p= 0.31). Conclusion: Anesthetic Efficacy Of 2% Mepivacaine Was Similar To That Of 4% Articaine In Inferior Alveolar Nerve Blocks For Anesthetizing Mandibular Molars With Symptomatic Irreversible Pulpitis.

Engy Mostafa Magdy Abdou, Eman Abou Auf And Mohamed Adel Ezzat,

ABSTRACT
This The Study Was Performed To Evaluate The Effect Of Galla Chinensis Extract (GCE) On The Micro Shear Bond Strength Durability Of Self-adhering Flowable Composite Fusio�Liquid Dentin) To Dentin. M&M: Fifty Two Extracted Human Molars Were Selected, Enamel Surfaces Were Flattened. The Teeth Were Randomly Divided Into Two Main Groups (A) (n=26). (A0) Was For Self-adhering Flowable Composite Without GCE (control) And (A1) Was For Self-adhering Flowable Composite With GCE. Each Main Group Was Divided Into Two Subgroups (T) According To Time Of Testing; (T1) After 24 Hours, (T2) After Three Months (n=13). All Specimens Were Stored In Artificial Saliva. Micro Shear Bond Strength Test Was Conducted Immediately After 24 Hours And After Three Months Using Universal Testing Machine. The Results Showed That The Highest Micro Shear Bond Strength Was For GCE Group After 24 Hours Storage And The Lowest Mean Micro Shear Bond Strength For The Control Group After Three Months Storage. There Was A Statistically Significant Difference (p?0.001) Between The GCE Groups And The Control Groups On The Mean Micro Shear Bond Strength Of Fusio� Liquid Dentin. Conclusion: GCE As A Natural Cross Linking Agent Could Be Of Positive Value On The Micro Shear Bond Strength Of Self-adhering Flowable Composite And Time Has No Significance On The Micro Shear Bond Strength.

Ahmed Zakaria Al-Adl, Amal Fathy Kaddah And Ahmed Emad Fayyad,

ABSTRACT
Two Implant Retained Mandibular Overdenture Is A Simple Solution In Rehabilitation Of Edentulous Patients. Equator Attachment Offers A Lower Profile Than The Self-aligning Attachment But There Is No Enough Researches That Compare Between Them.

Aim: Clinically Compare Between Both Groups Regarding Oral Health Related Quality Of Life And Overdenture Retention In Edentulous Patients Restored With Implant Overdenture.

Materials and Methods: Complete Denture Fabricated, Then Two Implants Placed At The Canine Region. Equator Attachments Connected To Group I And Self-aligning Attachments Connected To Each Group II. The Arabic Version Of The Oral Health Impact Profile For The Edentulous Patients Was Used Specifically To Evaluate The Impact Of Implant Prosthesis On The Patient�s Quality Of Life. Overdenture Retention Was Measured According To The Method Reported By (Jose F. Ma�es Et Al., 2011) Using A Spring Scale To Measure Retention Strength (in Newton).

Results: Regarding Oral Health Related Quality Of Life, There Was Statistically Significant Improvement From Time Of Insertion To 3 Months In Both Groups. There Was No Statistically Significant Difference Between Both Groups At Insertion Time And After 3 Months. Regarding Overdenture Retention, There Was Decrease Of Retention From Time Of Insertion To 3 Months Follow-up Periods With Statistically Significant Difference In Both Groups Of Study. Equator Group Showed Statistically Significant More Retention Force Compared To That Of Locator Group At Time Of Insertion, However, There Was No Statistically Significant Difference Between Two Groups At 3 Months Follow-up Period. Conclusion: Oral Health Related Quality Of Life Was Not Affected By The Attachment Type Or The Attachment Profile And It Usually Enhances With Time With Different Types Of Attachment. Regarding Overdenture Retention, Equator Attachment Presented Higher Retention Values Than Self-aligning Attachment At The Beginning Of The Study But It Showed Faster Retention Loss Than Self-aligning Attachment With Time.

Omnia Ahmed Badawi, Amal Hassan Abdel-Rahman And Hend Mohammed Wagih,

ABSTRACT
Background: Some Odontogenic Tumors Such As Ameloblastoma (AB), Ameloblastic Carcinoma (ABC) And Keratocystic Odontogenic Tumor (KOT) Have Aggressive Behavior With High Recurrence Rate. Cancer Stem Cells (CSCs) Are Small Subpopulation Groups Of Cells That Are Hypothesized To Be Responsible For Tumors� Aggressiveness And Recurrence. ABCG2 And CD44 Are CSC Markers, So The Aim Of This Study Is To Detect Their Expression In These Lesions Which Will Confirm The CSCs Origin Of Such Lesions.

Materials and Methods: 37 Specimens (15 AB, 10 ABC, 10 KOT And 2 Tooth Follicles Of Permanent Teeth) Were Collected; ABCG2 And CD44 Cytoplasmic, Membranous As Well As Nuclear Immunohistochemical Expressions Were Evaluated. The Area Percent Was Measured For The Positive Immunoexpression Of The Markers.

Results: As Regards ABCG2, A Highly Significant Difference Was Found Between Tooth Follicle, AB, ABC And KOT With The Highest Expression Was Observed In Tooth Follicle. In Contrast To CD44 Where No Statistical Significance Was Found Between AB, ABC And KOT With The Highest Expression Was Detected In AB. Conclusion: CD44 Had Diffuse Positive Immunoexpression In All Lesions In Contrast To ABCG2 That Was Mainly Detected In The Tooth Follicles With Frequent Focal Immunoexpression In The Tumors. So CD44 Was Considered To Be More Reliable Marker For CSCs Than ABCG2, Thus Making Such Tumors Potential Targets For Anti-CD44 Therapies.

Mohamed Omar Ismail , Ahmed A. Khalil And Mohamed Abdelmoniem. Ebrahem,

ABSTRACT
Objective: The Aim Of This Study Was To Evaluate And Compare The Efficacy Of PRF Combined With Biodentine And Biodentine Alone In The Treatment Of Class II Furcation Defects. Methods:�fourteen Patients With 28 Grade II Furcation Defect Were Treated With Either Open Flap Debridement And Biodentine Occlude Furcation Entrance (Group 1), Open Flap Debridement With PRF And Biodentine Occlude Furcation Entrance (Group 2) Plaque Index, Gingival Index, Probing Pocket Depth (PD), Clinical Attachment Level And Furcation Probing Were Recorded At Baseline And 3,6 Months Postoperatively. .

Results: The Results Of This Study Showed Significant Pocket Depth Reduction In Both Groups Throughout The Different Periods Of The Study. Statistical Analysis Showed Significant Decrease In Mean CAL From Baseline To 6 Months In Both Groups. Statistical Analysis Showed Significant Decrease In Mean HPD After 3 Months And After 6 Months In Both Groups. Regarding The Radiographic Parameters, Bone Density Increased From Baseline To 6 Months In Both Groups.

Conclusions:�Furcation Defect Treatment With Autologous PRF Combined With Biodentine And Biodentine Alone Results In Significant Reduction In Pocket Depth, Gain In Clinical Attachment, Gain In Vertical And Horizontal Clinical Attachment Level And Increase In Bone Density. Although PRF Combined With Biodentine Group Show More Improvement Regarding Both Clinical And Radiographic Parameters, There Was No Significant Difference

Mohamed Hanafy Tawfik; Manal Mohamed Hosny; Enji Ahmed Mahmoud And Olfat Gamil Shaker,

ABSTRACT

Objectives: The Aim Of This Study Was To Evaluate The Effect Of Systemic Administration Of Green Tea In Conjunction With Scaling And Root Planing Versus Scaling And Root Planing Alone On The GCF Total Antioxidative Capacity And Clinical Parameters In Patients With Generalized Moderate Chronic Periodontitis. Methods: Twenty Eight Patients Participated In This Study And Randomly Allocated Into Two Groups Group I (Test Group): Fourteen Patients Received Scaling And Root Planing Supplemented With Green Tea Tablets (300mg) To Be Taken Once Daily For 3 Months. Group II (Control Group): Fourteen Patients Received Scaling And Root Planing Supplemented With Placebo Tablets. The Following Clinical Parameters (Plaque Index PI, Gingival Index GI , Probing Pocket Depth PD And Clinical Attachment Level CAL) As Well As The Level Of Total Antioxidant Capacity (TAC) In The GCF Were Recorded And Measured At Baseline And 3 Months Post-treatment.

Results: Both Groups Showed Statistically Significant Improvement In All Clinical Parameters With No Difference Between Them. Test Group Showed More Statistically Significant Increase In TAC Than Do The Control Group. Conclusion: Green Tea Has A Therapeutic Effect As Anti-oxidant In The Treatment Of Patients With Chronic Periodontitis

Arwa Abu El-Magd , Tarik Essawy And Saher Sayed Mohammed,

ABSTRACT


Introduction: Botulinum Toxin-A (BTX-A) Is One Of The Most Poisonous Naturally Occurring Substances. It Blocks The Release Of Acetylcholine, The Principal Neurotransmitter At The Neuromuscular Junction, Causing Muscle Paralysis. This Toxin Is Licensed As A Drug For Medical Use Such As Being Used Effectively As Cosmetic Agent For Treatment Of Wrinkles On The Face. Aim Of The Work: This Study Was Carried To Evaluate The Effect Of Botulinum Toxin-A Injection On Rabbit Orbicularis Oris Muscle Histologically And Immunohistochemically.

Materials and Methods: Twenty Adult Healthy Male New Zealand White (NZW) Rabbits Weighing 2-2.5 Kg Were Used In This Study. The Animals Were Divided Into Two Main Groups (control And Experimental Groups). The Control Group (Group I) Consisted Of 5 Rabbits. Upper Lip Of Rabbits In Group I Was Injected By 0.05 Ml Saline. The Experimental Group (group II); Consisted Of 15 Rabbits And Divided Into 3 Subgroups (5 Rabbits In Each). Upper Lip Of Rabbits In Each Subgroup Was Injected By 2 U Of Botox. Rabbits In Group I & II Were Sacrificed After One, Two And Four Weeks. Animals Were Killed And The Upper Lip Of All Rabbits Was Dissected And Processed For Paraffin Sectioning And Stained With Hematoxylin And Eosin For Histological Examination And Caspase-3 For Immunohistochemical Examination.

Results: Histological Examination Of Subgroup 1&2 Showed Degenerated, Fragmented And Atrophied Muscle Fibers. In Subgroup 3, Perimysial Fibrosis And Fat Cell Accumulation Were Detected. Immunohistochemical Results Showed Increase In The Cytoplasmic Immunopositivity Of Caspase -3 In The Muscle Fibers From Experimental Subgroup 1 To Experimental Subgroup 3. Conclusion: Injection Of BTX-A Into Orbicularis Oris Muscle Revealed Deleterious And Damaging Effects On Histological Basis.

Eman Khodary Allam, Eman Sobhy El-Shamy And Omneya Mohamed Wahba,

ABSTRACT
Background: Oral Squamous Cell Carcinoma (SCC) Is A Characteristic Aggressive Tumor Representing A Significant Public Health Threat All Over The World. It Has Been Found In Several Body Malignancies That Cancer Stem Cells (CSCs) Are Small Subpopulation Of Cells Within The Tumor That Exhibit Self-renewing Ability And Are Responsible For Tumor Main�tenance, Growth And Metastasis.
Objectives: The Aim Of This Work Was To Investigate The Immunolocalization Of Cancer Stem Cells Markers; CD44 And ALDH1 In SCC And To Correlate The Expression Of These Markers In SCC Cases With Nodal Metastasis.

Materials and Methods: A Total Of 49 Specimens Of Oral SCC Were Divided Into 24 Cases With Nodal Metastasis And 25 Cases Without Nodal Metastasis For Evaluation Of Metastasis. Tissue Specimens Were Stained Immunohistochemically With Antibodies Against CD44 And ALDH1.

Results: CD44 And ALDH1 Expressions Increased In Poorly Differentiated SCCs. CD44 Expression Was Found To Be Statistically Highly Significant Relating To Histopathologic Grades Of Oral SCC. There Was A Non-significant Relation Between ALDH1 And Histopathologic Grades Of SCC. It Was Also Found That CD44 & ALDH1 Expressions Were Significantly Related To Lymph Node Status Of Primary SCC Cases.

Conclusions: The Results Of The Present Study Have Indicated That CD44 And ALDH1 Are Potential Markers Of CSCs In SCC. CSCs Positively Stained Cell Count Increased With Increasing The Grade Of SCC. Increased Expressions Of CD44 And ALDH1 In Primary SCCs Can Be Considered As A Useful Indicator Of The Metastatic Potential To Their Regional Lymph Nodes.

Ahmed Adel Soliman Angie Galal Ghoneim And Shaimaa Ismail Gawdat .,

ABSTRACT
Introduction And Objective: Post-operative Pain Is A Multi-factorial Event That Can Be Affected By Age, Sex, Pulpal And Peri-radicular Status, Type Of Tooth, Sinus Tracts, Pre-operative Pain And One Important Cause Has Been Claimed To Be The Instrumentation Process. The Objective Of The Present Trial Was To Compare The Incidence And Intensity Of Postoperative Pain After Using Reciproc Or One Shape Nickel-titanium Systems For Root Canal Instrumentation. Methods: Fifty Four Patients Diagnosed With Symptomatic Irreversible Pulpitis Were Equally Assigned Into 2 Groups, Reciproc (VDW, Munich, Germany) Or One Shape (MicroMega, Besan�on Cedex, France), According To The Root Canal Instrumentation Technique. Root Canal Treatment Was Completed In A Single Visit. At The End Of The Visit, Participants Were Asked To Rate The Intensity Of Postoperative Pain On The Numerical Rating Scale At 6, 12, 24, 48 And 72 Hours.

Results: Both Reciproc And One Shape Groups Had No Statistically Significant Difference In The Incidence Of Post-operative Pain At Different Follow-up Periods (6,12,24,48, And 72 Hours Post-treatment) After Single Visit Root Canal Treatment In Patients With Symptomatic Irreversible Pulpitis. Conclusion: The Intensity Of Postoperative Pain And Analgesic Intake Were Similar In Both Groups.

Sohil Souod Ali Shaalan And Sherif Bahgat El Tawil And Sara Ahmed Mahmoud .,

ABSTRACT
The Aims Of This Study Were To Assess: 1) The Effect Of Dental Educational Program On Oral Hygiene Among Institutionalized Hearing Impaired And Mute Children And 2)assess Particpants Satisfaction Toward Oral Health Via Questionaire Before And After Program. Two Hundred And Thirty Eight Children Within Age Range (6-12) Included In This Study Divided Into Two Equal Groups, Intervention Group And Control Group. Intervention Group Received Educational Program And Control Group Didn�t. Oral Hyiegne Simplified Index(OHIs) Was Done For Both Groups At Baseline And At Three Follow Up Visits (at 1st Week, 3rd Week And 6th Week). Questionnaire Was Taken At The Basline And At The End Of Study To Assess Particpants Satisfaction Toward Oral Health. The Result Of The Study Showed Significant Improvement In Oral Hygiene Status And Significant Improvement In Participant Satisfaction Toward Oral Health In The Intervention Group After The Educational Program.

Passant Nagi, Nevine Waly, Adel Elbardissy And Mohamed Khalifa Zayet,

ABSTRACT
Objective: Comparing Pulpotomy (partial/complete) For Cariously-exposed Vital Young Permanent Molars Using TheraCal/MTA-Angelus Regarding Post-operative Pain. Methods: This Was Randomized Clinical Trial, Double-blinded. We Treated 22 Permanent Molars, 7.7 Years Was Mean Age Of Participants. We Used Rubber Dam Isolation, Perform Pulpotomy, Direct Application Of Capping Material, Then Glass Ionomer Base And Composite Resin Final Restoration. We Took Immediate Standardized Postoperative Periapical Radiographs. We Evaluated Post-operative Pain Using Telephone Call The Same Day And Clinical Assessment 24 Hours Later.

Results: We Used Absolute Risk Reduction. The Risk Of Post-operative Pain At The Same Day Was 7-times More In TheraCal Group Compared To MTA Group. Pain Relief Was Observed 24 Hours After The Procedure. Conclusion: MTA Cause Less Post-operative Pain Than TheraCal When Used For Pulpotomy In Young Permanent Molars.

Ahmed Hassan Mohamed Ahmed El Banna, Emad Said Helmy And Mostafa Talaat El Gangehi,

ABSTRACT
Objective: The Purpose Of The Present Study Is To Evaluate The Effect Of Platelet Rich Fibrin (PRF) As A Grafting Material On The Quality And Quantity Of The Formed Bone At Maxillary Sinus Floor After Schneiderian Membrane Elevation And Maintaining Space With Titanium Mesh Versus Sinus Lifting Without Any Grafting Material.

Materials and Methods: The Patients Were Clinically And Radiographically Evaluated, The Clinical Evaluation Included Assessment Of Complications During Surgery And Postoperative Healing. Radiographic Evaluation Involved CBCT Radiographs Taken For Every Patient Immediate And 6 Months Postoperatively To Evaluate The Changes In Bone. While Histopathological Evaluation Involved Transcortical Bone Biopsies Taken After 6 Months During The Second Stage Surgery For Implant Placement.

Results: From The Data That Extracted From The Current Study We See Clear Radiological And Histological Evidences To Bone Formation In The Sinus After Using Lateral Window Technique For The Lift While Using Blood Clot Alone In One Group And PRF In The Other Group For The Bone Formation. Also There Was No Significant Difference In Linear, Volumetric Of Newly Formed Bone In Both Groups. Conclusion: Titanium Mesh Serve As A Space Maintaining Devices In Both Grafting And Non-grafting Sinus Lifting Techniques Regarding Tenting And Bone Formation, During Graftless Maxillary Sinus Lifting Blood Clot Serves As Autogenous Graft Filler Material For Bone Regeneration.

Maram Taema, Nouran Abdel Nabi, Heba Kamal And Samira Ibrahim,

ABSTRACT
In The Present Study, A Total Number Of Six Female Patients (12 Joints) Were Included In The Study. All Included Patients Were Diagnosed For Anterior Disc Displacement With Reduction. All Included Patients Received A Pre-operative Magnetic Resonance Imaging (MRI), And Pain Assessment Using A VAS Scale. Patients Were Randomly Divided Into Two Groups The First Group Of Patients Received Botox Injection In The Lateral Pterygoid Muscle, While The Second Group Of Patients Received Botox Injection In The Lateral Pterygoid Muscle And Received An Anterior Repositioning Splint One Week After Botox Injection. All Patients Were Followed Up 2 Weeks After Botox Injection, And Every Month For A 4 Month Follow Up Period After Botox Injection. Both Groups Of Patients Showed Clinical Improvement Regarding Pain, Mouth Opening And Clicking. The First Group Of Patients Showed Better Clinical Results When Compared To The Second Group Of Patients.

Ali El Masri, Nayer Aboelsaad, Ahmed Abdel Moneim And Essam Osman,

ABSTRACT


Purpose: The Aim Of This Study Was To Evaluate The Pain Sensation That Orthodontic Patients Experience When Initial Arch Wire Is Placed And To Determine The Degree Of Analgesic Efficacy Of Low-level Laser Therapy (LLLT) Comparing It With A Placebo Treatment Using Two Different Duration Of Laser Application.

Materials and Methods: This Study Was Carried Out As A Randomized Control Clinical Trial (split Mouth Design). The Study Sample Consist Of 20 Patients (10 Females, 10 Males), Between The Ages Of 15 And 25 Years. Just Before Placing The Initial NiTi Wire A Record Of Pain At Time T1 Had Taken Then The Wire Placed And Fully Fill The Bracket Slot. The Upper Right Side Had Irradiated Using 910nm GaAlAs Diode Laser With An Output Power Of 0.2W For 10s/point And Of 2 J/point, Three Points Were Irradiated In The Vestibular Zone: Two Points At The Third Cervical (mesial And Distal) And One In The Apical Third. After That Three Points Were Irradiated At The Palatal Zone In The Experimental Quadrant. The Total Energy Released In All Laser-treated Teeth Was 12 J. Irradiation Is Done For 1 Min In Group A(GA) And 1 Min For 2 Time In Group B(GB) So That The Output Power (0.2w) And Energy (2j/point) Is Fixed. The Same Procedure Had Repeated In The Contra Lateral Quadrant, But With Laser Switched Off. This Procedure Had Been Done Immediate After First Wire Insertion Then It Is Repeated After 24 Hours, 48 Hours, And 72 Hours. Results Had Taken Using VAS Scale Before Placing The Wire And At 5min, 6h, 24h, 48h, 72h, One Week, And Two Weeks After Wire Insertion.

Results: Pain Level Reported For The Experimental Laser Side Was Significantly Less Than That Reported For The Control Placebo Side (GA T= 0.56, GB T= 0.42) In Both Groups However The Group B That Exposed To Laser Extra Time Show Lower Value Of Pain Than Group A. The Mean Pain Value In Laser Exposed Side Was More Than That For Placebo Side For Both Groups. The Progression Of Pain Was The Same For Both Groups. GA Showed More Pain Values Than GB But There Is No Statistical Difference During The Study Period. Conclusion: The Application Of LLLT After The First Wire Insertion Is An Effective Way To Decrease Orthodontic Pain, But The Increase Of Duration Of LLLT Has No Obvious Difference.

Miran Ismail I., Manal M. Hosny And Shahinaz Gamal El-Din Alashiry,

ABSTRACT

Objectives: The Aim Of This RCT Was To Assess The Effect Of Topical HA On Postoperative Pain After MWF Versus MWF Alone In Patients With Chronic Periodontitis. Methods: Forty Patients With Chronic Periodontitis Having PPD ? 5 Mm And CAL ? 5 Mm Were Randomly Assigned To Be Treated With MWF Surgery In Conjunction With Either 0.2% Hyaluronan Gel (test) Or Placebo Gel (control) Application For 1 Week, Following Initial Nonsurgical Periodontal Therapy And Re-evaluation After 4 Weeks. Patient Discomfort Measured By VAS And Post-operative Consumption Of Acetaminophen Analgesic Were Evaluated Daily For 1 Week. Tissue Edema, Tissue Color Values Were Recorded 1 Week After Surgical Treatment. CAL, PPD, PI, And BOP Values Were Assessed At Baseline And 2 Months After Surgical Intervention.

Results: Test Group Showed More Reduction In Average VAS Scores, Acetaminophen Consumption, PPD And CAL During Serial Measurements (especially In VAS Measurements) Without Reaching Statistical Significance. No Significant Differences Were Present Regarding BOP And PI Values (P>0.05). Moreover, Significantly Higher Values Of TEI And TCI Scores Were Revealed In Control Group Compared To Test Group (p = 0.0001). Conclusion: Hyaluronan Gel Application In Conjunction With MWF Surgery Appears To Improve The Periodontal Surgical Outcome In Terms Of VAS, Reduction In The Number Of Rescue Pills Intake, Tissue Edema And Tissue Color Of The Gingiva.

Doha Mostafa, Heba Hamza And Ahmed El Zohairy,

ABSTRACT
Objective: The Study Was Conducted To Evaluate The Effect Of Acidic Beverages On The Color Stability And Microhardness Of Ormocer And Nanohybrid Resin Composites.

Materials and Methods: Thirty Disk-shaped Specimens (6X2mm) Of Each Of 2 Resin Composites, Admira Fusion And Grandio Were Prepared. The Specimens Were Then Divided Into 3 Subgroups Of 10 Specimens Each And Immersed In 3 Immersion Solutions (cola, Orange And Artificial Saliva) For 3 Hours Daily Over A 15-day Test Period. Color Of The Specimens Was Measured With A Digital Spectrophotometer Vita Easy Shade Using CIELAB Color Space And Microhardness Measurements Were Done Using Vicker�s Microhardness Tester. Pre And Post Immersion Measurements Were Taken And Statistically Analyzed.

Results: After Immersion, Admira Had More Color Change Than Grandio And Was More Affected By Cola. Also Admira�s Microhardness Was More Affected By Immersion In Cola Compared To Grandio. Conclusion: The Nanocomposite Grandio Compared To Ormocer Admira Was More Resistant To Color Change And Surface Microhardness Changes When Immersed In Acidic Beverages.

Ohoud T. Zainelabdeen, Eman S.Elmasri, Samah M.Awad And Ahmad M.M. Badr .,

ABSTRACT

Objectives: To Determine The Prevalence Of Dental Caries In Pre-term Children Aged 2-5 Years Seeking Treatment Or Follow Up At Cairo University Children�s Hospital �Abo El-rish� At El-Monira, Cairo, Egypt. Design: It Is A Cross Sectional Study. Subjects And Methods: A Total Sample Size Of 300 Children Was Taken (140 Boys And 160 Girls), Assessment Of Oral Hygiene And Dietary Habits Was Aided By A Specially Designed Questionnaire, It Contained Six Open Ended And Eight Closed Ended Questions. Part One Included The Patients� Personal Data, Second Part Was About The History Of The Child�s Feeding, And Third Part Included Some Questions About The Child�s Oral Hygiene. Clinical Examination Of Children Was Performed By The Researcher Using: A Dental Mouth Mirror, Dental Probe And A Piece Of Cotton Or Gauze. All The Surfaces Of The Teeth Were Examined For The Presence Of Dental Caries And Recorded Using The (dmft Score Of Primary Teeth.

Results: The Results Of This Study Showed That The Prevalence Of Dental Caries Was 96.6% Among The Studied Sample With Dmft Sores Ranging From 0.00-16.0 With Mean Dmft Of 4.0. Conclusion: Presence Of A Direct Positive Correlation Between The Pre-term Birth And Dental Caries In Primary Dentition. The Effect Of The Other Cariogenic Factors And Oral Hygiene Measures On The Pre-term Children Teeth Was A Direct Relation In Causing Dental Caries In Pre-term Children.

Ola Adel Hafez, Alaa Eldin Hussein Diab And Heba Ahmed El-Asfouri .,

ABSTRACT
Aim Of The Study: Was To Compare The Intensity Of Postoperative Pain After Single Visit Endodontic Treatment Using ProTaper Universal Multiple File System And The Single File Rotary Systems; ONE ENDO And F6 SkyTaper. Methodology: In This Single-blinded, Parallel-grouped Randomized Clinical Trial, A Total Of 58 Healthy Patients Aged Between 20 To 50 Years Old Were Diagnosed With Symptomatic Irreversible Pulpitis Of One Maxillary Or Mandibular Premolars. Teeth Were Randomly Assigned To Three Groups According To The Root Canal Shaping System: ONE ENDO (Group A), F6 SkyTaper (Group B) And Rotary ProTaper Universal As A Control (Group C). All Treatments Were Completed In A Single Visit. The Severity Of The Postoperative Pain Was Assessed By The Verbal Rating Scale (VRS) After 24, 48 And 72 Hours. Data Were Analyzed Using The Kruskal-Wallis And Mann-Whitney U Tests.

Results: After 24 Hours: There Was No Statistically Significant Difference Between The Three Studied Groups (p= 0.126). After 48 Hours: Group A Showed The Lowest Pain Levels With Statistically Significant Difference With Both Groups B (p=0.003) And C (p=0.036). However, There Was No Statistically Significant Difference Between The Intervention Group B And The Control Group C (p=0.407). After 72 Hours: Group A Showed The Highest Levels Of Total Pain Relief (ie; Pain Score 0) With Statistically Significant Difference With Group B (p=0.011) But Without Significant Difference With Group C (p=0.073). Pain Scores For Both Groups B And C Were Almost Similar (p=0.459). Conclusion: Number Of Instruments Had No Impact On Postoperative Pain.

Yasmin Shebl Hussein, Samir Mahmoud Ali Zidan And Jylan Fouad El Guindy,

ABSTRACT
Objective: To Evaluate The Surface Hardness Of Cemented CERASMART Laminate Veneers After Exposure To Acidic Beverages (coffee, Carbonated Orange Juice And Artificial Saliva) For 24 Days Resembling 2 Years Of Clinical Service.

Materials and Methods: A Total Of 36 Cemented CERASMART Laminate Veneer On Extracted Central Incisors Were Fabricated By CEREC MC XL Milling Machine. All Samples (N=36) Were Divided Into To Three Test Groups As Follows: Group (A): Stored In Artificial Saliva Group B: Stored In Coffee And Group C: Stored In Carbonated Orange Juice. Surface Hardness Was Measured After Exposure To Aging Solutions, Where The Surface Hardness Was Measured Through Vicker�s Indentation, Three Indentations Were Made In Each Sample And The Mean Was Calculated For Each. Data Were Analysed Using One-way Analysis Of Variance (ANOVA) Significance Difference Test. Differences Were Considered Significant At P<0.05.

Results: It Was Found That The Highest Mean � SD Value Of Surface Hardness Recorded With Saliva Storage (204.607�6.905 HV) Then Coffee Storage Mean Value (202.796�6.014 HV) While The Lowest Mean � SD Value Of Surface Hardness Recorded With Orange Storage (201.867�7.438HV). The Difference Was Statistically Non-significant As Indicated By One-way ANOVA (F=0.416, P=0.6687>0.05).

Conclusions: Surface Hardness Of CERASMART Veneers Was Not Affected By Coffee And Carbonated Orange Juice Immersion.