Manar Abd El-Mageed, Mohammed Adel Ezzat And Amir Hafez,

ABSTRACT


Aim: To Evaluate The Bond Strength Of Ormocer Based Resin Composite Using Conventional Versus Ormocer Based Etch And Rinse Adhesives To Dentin Using Microtensile Bond Strength Test And To Assess Tooth Restoration Interface Using Environmental Scanning Electron Microscope (ESEM).

Materials and Methods: A Total 66 Premolars Were Collected And Divided Into Two Main Groups According To Type Of Adhesive System Used Either Ormocer Based Adhesive System Or Conventional One, Each Group Was Further Divided Into Three Subgroups According To Storage Time Either 24 Hrs, One Or Three Month. Teeth Were Sectionned To Beams; And These Beams Were Subjected To Microtensile Bond Strength Using A Universal Testing Machine. Then The Fractured Specimens Were Collected And Examined Under Enviromental Scaning Electron Microscope (ESEM) To Analyze Modes Of Failure.

Results: The Result Of Current Study Showed That Ormocer Based Adhesive Recorded The Highest Significant Mean Microtensile Bond Strength Value Compared To Conventional One. Also, Regarding Storage Period, It Was Found That In Both Adhesives The 24 Hrs Group Showed Highest Mean Microtensile Bond Value Strength Followed By One Month And The Least Value Recorded After Three Months. Conclusion: Ormocer-based Resin Composite Should Be Used With Its Matching Specially Formulated Ormocer Adhesive System Because Of Their Chemical Affinity To Each Other. Also An Artificial Aging Has A Noticeable Influence On The Bond Strength Of Both Tested Adhesives.

Dina Kamal , Dalia A. El-Baz, Laila A. Rashed And Samah S. Mehanni .,

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Objectives: Traumatic Oral Lesions May Be Due To Physical, Thermal Or Chemical Injuries. Wound Healing By Secondary Intention Is Divided Into Three Phases: Inflammation, Proliferation, And Remodeling. Stem Cell Based Therapies Are Being Investigated For The Treatment Of Many Conditions. Miura Et Al. 2003 Isolated Stem Cells From Pulp Tissue Remnants Of Exfoliated Deciduous Teeth And They Termed Them Stem Cells From Human Exfoliated Deciduous Teeth (SHED). SHED Was Found To Have A Higher Proliferating Rate Than DPSCs And BM-MSCs Which Suggest That They Are A Less Mature Population Of Multipotent Stem Cells. Design: Thirty Male Albino Rats Were Utilized, Fifteen As Control Group And Fifteen As SHED Group. The Tongues Were Dissected And Examined Histologically.

Results: The Histopathological Results Showed Complete Coverage Of The Surface Of The SHED Group At 7 Days While The Control Group Was Still Showing An Open Ulcer. Conclusion: SHED Showed Better Healing Of Induced Wounds Compared With Control Group.

Marwa Ahmed Ahmed Zaghloul, Manal Ahmed El Sayed And Randa Youssef Abd Al Gawad,

ABSTRACT
Objective: The Purpose Of This Study Was To Evaluate The Prevalence Of Supernumerary Teeth Among Egyptian Children With Oral Clefts. Study Design: This Study Was Designed As An Observational (cross-sectional Study). A Group Of 43 Egyptian Children With Oral Clefts Were Recruited In The Study. The Frequency Of Supernumerary Teeth Was Assessed Using Clinical Examination And CBCT Radiographic Investigation.

Results: Among The Total Study Sample 7 Patients (16.3%) Had Supernumerary Teeth. Six Patients (14%) Had One Supernumerary Tooth And One Patient (2.3%) Had Two Supernumerary Teeth. All Supernumerary Teeth Were Detected At The Area Of Upper Incisors. Conclusion: Patients Affected By An Oral Cleft Are Subjected For Higher Incidence Of Dental Anomalies Such As Supernumerary Teeth.

Marwa Salem , Jylan El-guindy And Heba Hamza .,

ABSTRACT
Statement Of The Problem: High Failure Rates Of Porcelain Laminate Veneers Have Been Attributed To The Exposure Of Dentin Surface During Preparation Which Greatly Decreases The Bonding Strength At The Dentin-cement Interface. Natural And Synthetic Cross-linking Agents Have Been Introduced To Restore Dentin Function And Enhance Bonding Strength.

Purpose: The Aim Of This Study Was To Evaluate The Clinical Performance Of E.max CAD Veneers Bonded With And Without Using Grape Seed Extract As A Natural Crosslinking Agent Before Bonding.

Materials and Methods: A Total Of 20 Ceramic Laminate Veneers Were Included In The Study And Completed By One Operator (the Researcher). The Ceramic Laminate Veneers Were Fabricated By One Experienced Dental Technician. The Operator Followed The Five Phases Of Laminate Veneers Fabrication. For The Intervention Group, We Applied Grape Seed Extract (GSE) In The Gel Form To The Previously Etched Tooth Structure, Then It?s Washed Away With Water & Gently Dried Before Proceeding With Conventional Bonding Steps As The Control Group. Follow Up Sessions Were Done Every Three Months For One Year. This Was Performed By An Experienced, Blinded Investigator. Data Were Recorded And Statistically Analyzed Using The Chi-square Test And The Significance Level Was Set At P � 0.05.

Results: There Was No Statistically Significant Difference Between (Group I) And (Group II) Where (p=1) As Both Groups Showed (100%) Alpha In All Time Periods. Conclusion: Within The Limitations Of This Clinical Study, IPS E.max CAD Laminate Veneers Bonded With Both Techniques, With And Without Using GSE As Natural Crosslinking Agent, Revealed Successful Clinical Performance Regarding Marginal Adaptation.

Abanoub Raouf , Magdy Mohammed And Reham Hassan,

ABSTRACT


Aim: The Aim Of This Study Was To Measure The Root Canal Transportation And Centering Ability Of XP-shaper And Compare It With TRUShape And Hyflex EDM Ni-Ti Rotary System. Materials&Methods: Sixty Human Permanent Mandibular First Molars Were Decoronaized, Distal Roots Were Separated From The Mesial Ones. The Working Length Of Each Canal Was Determined By Subtracting 1 Mm From The Apical Foramen Before Scanning. All The Roots Were Scanned Using Cone Beam Computed Tomography (CBCT) To Detect The Canal Shape Before Instrumentation. Samples Were Randomly Divided Into 3 Equal Groups (n = 20 Canals Per Group) As Follow: Group I; Roots Were Mechanically Prepared Using Hyflex EDM Single File (size 25/~), Group II; Roots Were Mechanically Prepared Using TRUShape File (size 30, Taper 0.04) And Group III: Roots Were Shaped Using The XP-shaper File (size 30, Taper 0.01). The Root Canals Were Scanned After The Mechanical Preparation Using CBCT Then Pre And Post Instrumentation Scans Were Superimposed To Evaluate The Degree Of Transportation As Well As The Centering Ability Of The Tested Instruments. Data Were Analyzed Using Kruskal-Wallis Test For Comparing The Three Systems, While Friedman?s Test Was Used To Compare Between The Root Levels.

Results: Results Displayed That, As Regards The Total Amount Of Transportation, There Was No Statistically Significant Difference Between The Three Systems. By Comparing Between The Root Levels, TRUShape System Showed That There Was No Statistically Significant Difference Between 3 And 5 Mm Levels; Both Showed Statistically Significantly Higher Median Amount Of Transportation Than 7 Mm Level. As Regards The Total Centering Ratio, Hyflex EDM Showed The Statistically Significant Highest Median Centering Ability.

Conclusions: It Was Concluded That The Three Rotary Systems Preserved The Original Canal Anatomy Regarding That Hyflex EDM Possess The Highest Centering Ability.

Lobna M. Salah Eldin, Manal M. El-Assaly , Dalia A. El-Baz And Laila A. Rashed .,

ABSTRACT

Objectives: Head And Neck Cancers Are Now Common Worldwide. One Of The Most Commonly Used Methods To Treat Head And Neck Cancer Is Irradiation. However, Irradiation Has Some Side Effects That May Affect Patients? Life, So It Is Important To Find A Convenient Way To Reduce Those Side Effecs. The Current Study Was Performed To Investigate And Compare The Effect Of Microvesicles To Bone Marrow Stem Cells On Levels Of Secretory Immunoglobulin A In Parotid Salivary Gland Of Irradiated Albino Rats. The Parotid Glands Were Also Examined Histologically. Design: Forty Eight Male Albino Rats Were Utilized, Sixteen As Irradiated Group (Positive Control) And Thirty Two As Bone Marrow Stem Cells And Microvesicles Treatment Groups. The Parotid Glands Were Dissected And Levels Of Secretory Immunoglobulin A Were Detected By ELISA.

Results: The ELISA Results Showed That Administration Of Bone Marrow Stem Cells And Microvesicles Decreased Levels Of Secretory Immunoglobulin A That Were Elevated As A Result Of Irradiation. Histological Examination Also Revealed Better Gland Morphology In The Bone Marrow Stem Cells As Well As Microvesicles Treated Groups.

Conclusions: The Most Prominent Ameliorative Effect Was Found Associated With Microvesicles Administration. Bone Marrow Stem Cells Have Shown Ameliorative Effects On Parotid Glands As Well. However, Further Studies Are Required To Assess The Safety Of These Methods.

Shaza Mohammad Hammad , Noha AbdelMawla El-wassefy, Ahmad Mohammed Hafezand Nasser AbdelGader Abubaker .,

ABSTRACT


Introduction: Friction In Orthodontics Should Be Controlled During All Stages Of Treatment, Especially The Space Closure Stage. If The Friction Resistance Is High, Slow Progress And Unnecessary Elongation Of The Treatment Time Might Result. Consequently, A Practitioner Must Apply Greater Mechanical Forces To Overcome The Frictional Force Progressively Throughout The Treatment. Friction Is Affected By Physical And Biological Factors. The Physical Factors Have Been Thoroughly Studied In The Literature. These Physical Factors Are Related To The Bracket And Archwire Properties And The Ligation Methods. The Current Knowledge On The Subject Is Based On In Vitro Studies That, In Most Instances, Produced Conflicting Results. This Could Be Due To The Inherent Limitations Of These Studies As Standardization Of Methods. Objective: This Article Debated How Can Multi-variables Affect The Frictional Resistance During The Orthodontic Tooth Movement Stage. Abbreviations Stainless Steel: St.St Nickel Titanium: NiTi Titanium Molybdenum Alloy: TMA Herbal Mouthwash: HMW Sodium Fluoride: NaF

Radwa Hassan Mosaad Husein, Alaa Abd-Elsalam ElBaz And Nehal Nabil Roshdy,

ABSTRACT
Aim Of The Study: The Aim Of The Present Study Was To Evaluate And Compare The Postoperative Pain After The Use Of Two Different Intracanal Medicaments: Modified Triple Antibiotic Paste (MTAP) And Calcium Hydroxide Ca(OH)2 In Two Visit Root Canal Treatment After 4, 24 And 48 Hours Utilizing A Numeric Rate Scale (NRS). Methodology: Fifty Patients With Asymptomatic Necrotic Anterior And Premolar Teeth Were Randomly Assigned Into Two Groups; Experimental Group Medicated With1mg/ml Of Readymade Modified Triple Antibiotic Paste (MTAP) And Control Group : Medicated With Calcium Hydroxide Intracanal Medicament Prepared By Mixing 100 Mg Powder With 1ml Distilled Water. Postoperative Pain Was Assessed For Both Groups At 4, 24 And 48 Hours After The First Visit Using A Numerical Rating Scale (NRS).

Results: There Was A Statistically Significant Difference Between Both Groups After 4 Hours Postoperatively, While There Was No Statistically Significant Difference Between Both Groups At 24 And 48 Hours. Regarding Pain Incidence, The Overall Occurrence Of Pain And Its Category Was Not Statistically Significant Between Both Groups. In MTAP Group; There Was No Statistically Significant Difference Between Median NRS Scores Over Time. However, In Ca(OH)2 Group : There Was No Statistically Significant Difference Between NRS Scores Comparing 24 Hours With 48 Hours, While There Was A Statistically Significant Decrease In NRS In All Other Time Periods. Conclusion: Triple Antibiotic Paste As Anintracanal Medication Showed To Be Effective In Reducing Postoperative Pain When Used In Necrotic Teeth Compared To Calcium Hydroxide.

Doaa M. Galal, Mohamed S. Farag And Nabeel E. Shamaa .,

ABSTRACT
Objective: Studies On The Relationship Between Children?s Malocclusion And Its Psycho-social Impacts Are So Far Largely Unexplored. This Study Aimed To Assess The Prevalence Of Malocclusion, Reported Dental Problems And Dissatisfaction With Dental Appearance Among Primary Public And Private School Children In Ismailia City, Egypt.

Materials and Methods: A Randomly Selected Cross Sectional Study Was Carried Out On 400 School Children From Public And Private Schools With Equal Gender Distribution Of Age Range 9 To 12 Years; With Mean Age 10.988 Old And SD �0.793. The Participants Completed A Face To Face Interviews And A Full Mouth Clinical Examination In Their Schools. A Questionnaire Was Used For Recording The Data. Data Were Analyzed Using SPSS, V-20, Descriptive, Chi-square And Correlation Coefficient Tests Were Applied.

Results: The Difference In Prevalence Of Awareness Of Orthodontic Treatment In Public And Private School Children Recorded About Five Times Of The Public Sample Did Not Hear About It While In The Private Sample Was 1/6th. This Difference In Orthodontic Treatment Awareness Was Highly Significant (p<0.05). This Difference In Prevalence Of Malocclusion In Male And Female In Both Schools Types Was In-significant. Conclusion: There Is Obvious Difference Of Awareness On Orthodontic Treatment Between Public And Private School Children. The Results Support The Expectation That Children In Private Sample Would Have Better Attitude Towards The Awareness Of Orthodontic Treatment Than The Public Sample.

Antonious Naeem Ayad , Maha Eshak Amer And Mohamed Salah Abdel Motamed,

ABSTRACT


Purpose: Assessment The Accuracy Of CBCT In Detection Of Horizontal Root Fracture By Alternation Of Exposure Parameters In Endodontic Treated Teeth

Materials and Methods: 18 Single-rooted Human Teeth Will Be Selected Then Inspected By Trans-illumination For The Absence Of Root Fracture, And By Conventional Periapical Radiographs To Observe Root Canal Anatomy. Teeth With Caries Extending To The Root, Restorations, Pulp Calci?cations, Root Resorption Or Root Fracture Will Be Excluded. Finally Each Tooth Coded And Divided Into Two Groups:, Nine Teeth With Obturation With Guttapecha Only And Nine Teeth With Obturation With Gutta-percha And With Root Fracture. Then The Roots Of Teeth Will Be Fractured By Hummer With Standardized Force Perpendicular To The Long Axis Of The Tooth. Each 3 Teeth Will Be Mounted Separately In A Blocks That Will Be Made From Silicon Impression Putty. Then The Blocks Will Be Placed In A Fine Plastic Cylinder Containing Water To Simulate Soft Tissue. The Cylinder Will Be Placed On The Chin Rest Of CBCT Unit. The Teeth Will Be Imaged By Centering The Block In A Smallest Field-of-view FOV (H ? D) 50 ? 50 Mm. By Changing In Exposure Parameters (5 MA) With Standardized Resolution, (5 MA) With High Resolution, (10 MA) With Standardized Resolution And (10 MA) With High Resolution We Produce 72 Evaluations Detected By Three Radiologists.

Results: There Is No Significant Difference By Different Parameters Of CBCT To Detect HRF In Endodontic Treated Teeth With Gutta-percha. Standardized Resolution With (5 MA) Is The Most Specific Parameter To Detect HRFs In Endodontic Treated Teeth With Gutta-percha.

Conclusions: Diagnostic Accuracy Of CBCT In Detection Of HRFs Does Not Affected By Alternating Resolution And Milliampere.