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.