Moataz Moktar, Eman Mohie, Fady Fahim And Amr Labib,

ABSTRACT
Objective: To Detect Influence Of Bend-back Of The NiTi Wires During Leveling And Alignment On The Maxillary Incisors.

Materials and Methods: The Sample Comprised 42 Females And Males Aging About 20+2 Years. They Were Randomly Allocated Into Two Groups: Control Group (A) And Intervention Group (B) With Bend-back Of All Leveling Arch Wires. Lateral Cephalomtric Radiographs Were Performed And The Data Were Statistically Analyzed.

Results: Significant Increase In The Maxillary Incisors? Proclination Was Manifested In Both Groups, Where There Was Increase In The U1/PP, U1/NA And U1-NA(mm) Measurements.

Conclusions: Bend-back Of The Niti Wires During The Leveling And Alignment Stages Did Not Prevent Or Decrease The Incisors? Proclination Of The Maxillary Incisors.

Tarek Salah Hashim Ali*, Nora Cheta** And Mahmoud EL Far***,

ABSTRACT
In-vivo Study Was Carried Out To Evaluate The Amount Of The Linear Dimensional Changes Of Maxillary Complete Denture Fabricated By Using Digital Light Projection (DLP) 3D Printing Method And Conventional Compression Flask Method. Eighteen Completely Edentulous Patients Were Included In The Study. For Each Patient, The Maxillary Master Cast Was Used To Fabricate Duplicate. The Obtained Duplicates Were Used To Fix Three Cover Screws At The Following Positions; A: The Incisive Papilla, B: The Right Second Molar Area, C: The Left Second Molar. Patients Were Divided Into Two Equal Groups Of Nine Participants, Group (1) The Conventionally Processed Complete Denture And Group (2) The Digital Light Projection (DLP) 3D Printed Complete Denture. The Dimensional Changes Were Measured Using Digital Caliper With Accuracy Of 0.02mm. Dimensional Changes Occurred In Both Types Of Complete Dentures Bases. Digital Light Projection (DLP) 3D Printed Complete Dentures Showed More Dimensional Stability Than The Conventional Compression Flask Complete Dentures With No Statistical Significance.

Nesma Nabil Mahrous, Dina Soliman Khater And Nermin Raouf,

ABSTRACT
Background: Ameloblastoma (AB) And Keratocystic Odontogenic Tumor (KCOT) Are Benign Locally Invasive Epithelial Odontogenic Neoplasms With High Recurrence Rate. Furthermore, Ameloblastic Carcinoma (ABC) Is The Malignant Variant Of Ameloblastoma With An Aggressive Behavior As Well As Poor Prognosis And High Recurrence Rate. Aim Of This Study Was To Evaluate The Immunohistochemichal Expression Of Ezrin Antibody In These Epithelial Odontogenic Tumors Aggressive Behavior.

Materials and Methods: Immunostaining For Mouse Monoclonal Anti-human Ezrin Antibody Was Performed On 2 Tooth Germ (was Used As A Control), 15 AB, 10 ABC And 14 KCOT Archival Blocks.

Results: The Statistical Analysis Revealed The Highest Mean Area Of Ezrin Immunoexpression In ABC, While The Lowest Mean Value Was Recorded In Tooth Germs. It Also Revealed That The Difference Between All Studied Caeses Was Extremely Significant. Conclusion: The Positive Cytoplasmic Immunoexpression Of Ezrin In AB, ABC, And KCOT Indicates That It It Could Be A Valuable Tool In Detecting Their Biological Behavior, Invasiveness And Progression.

Esraa Abdel Ghaffar Ahmed, Mohamed Adel Ezzat Khairy And Maha Abdel Salam El-Baz,

ABSTRACT
Objective: The Study Was Conducted To Evaluate The Effect Of 8% Arginine Based Toothpaste In Comparison To 8% Strontium Acetate Based Toothpaste On Dentine Hypersensitivity Reduction.

Materials and Methods: This Was A Randomized, Triple-blind, Placebo Controlled Study. Fifty One Subjects With A Confirmed Diagnosis Of?dentin Hypersensitivity?were Randomized To One Of Three Treatments: ?Arginine Based Toothpaste (Colgate Pro-relief), Strontium Acetate Based Toothpaste (Sensodyne Rapid Action), Or Placebo. A Standard Test Stimulus Was Calibrated Short Blast Of Air Syringe, Applied To Sensitive Dentin?surfaces. Subjects Recorded The Intensity Of?sensitivity?in Response To Stimulus On A Visual Analog Scale At Baseline, And After 1 Week, 2 Weeks And 3 Months.

Results: All Study Treatments Showed Statistically Significant Reductions From Baseline In DH Pain At All Time Points Where (p<0.001). 8% Arginine Based Toothpaste (Colgate Pro-relief) Was Statistically And Clinically Significant Higher When Compared With 8% Strontium Acetate Based Toothpaste (Sensodyne Rapid Action). These Products Were Shown To Be Significantly Superior To The Placebo At All Time Intervals. Hence, The Hypothesis Was Accepted. Conclusion: 8% Arginine Based Toothpaste And 8% Strontium Acetate Based Toothpaste Are Considered A Promising Agents That Can Be Used To Reduce Pain Associated With Hypersensitivity. It Has Been Shown That There Is Considerable Reduction Clinically And Statistically Significant In Dentinal Hypersensitivity In The Participants Under The 8% Arginine Based Toothpaste Group When Compared With The 8% Strontium Acetate Based Toothpaste.

Mohamed Ali Attia, Mohammed Atef And Maha Hakam,

ABSTRACT
Background: Several Grafting Materials Have Been Proposed For Sinus Augmentation Including Autogenous Graft, Allograft, Xenograft, Synthetic Biomaterials And Recently Platelets Concentrates.

Purpose: Evaluating Effect Of Injectable Platelet Rich Fibrin (I-PRF) Mixed To Deproteinized Bovine Bone (DBB) (sticky Bone) In Sinus Augmentation In Comparison With A Solely DBB Regarding Amount Of Bone Height Gained, Bone Density And Implant Stability.

Materials and Methods: 19 Patients With 20 Pneumatized Sinus 3:6 Mm Residual Alveolar Ridge Height Underwent Single Stage Sinus Lift. 10 Sinuses Were Grafted With DBB In Control Group While Sticky Bone Was Used In 10 Sinuses As A Test Group. CBCT Were Taken Immediately And 6 Months Postoperative. Osstell Readings Were Taken After Insertion And During Implant Exposure.

Results: After 6 Months, Mean Bone Height Gain Of DBB Group Was 8.46? 1.87 Compared To 8.43?2.67 In Sticky Bone Group. This Was Statistically Non-significant. Mean Bone Density Value Was 408.4?66.7 In DBB Group Compared To 547.8?158 In Sticky Bone Group. This Was Statistically Significant. For Stability, Mean ISQ Value Was 74.7?7.2 In DBB Group And 74.7?6.4 In Sticky Bone Group. This Was Statistically Non-significant. Conclusion: Regardless Limitations Of This Study, Results Indicate No Advantages For Sticky Bone Over DBB On Amount Of Bone Generated Or Implant Stability. However, Sticky Bone May Enhance Quality Of Regenerated Bone Inside The Sinus.

Mohamed M. Sabry; Mohamed Riad Farid And Rasha Ra?fat Abdel Aziz ,

ABSTRACT


Aim: To Assess The Reliability Of The Fluorescence Camera Or Caries Detection Dye Versus Visual Tactile Method In Caries Excavation Using Bacteriological Assessment Method.

Materials and Methods: 60 Carious Lesions In 20 Paticipant (3 In Each Paticipant) Was Chosen In This Study. In Each Participant, There Had Been 3 Carious Lesions ; The Excavation End Point Of One Cavity Was Determined Using Visual Tactile Method. The Two Other Cavities Were Inspected Using The Fluorescent Camera And Caries Detector Dye (CDD) To Determine The Excavation Endpoint Respectively. Dentine Samples From The Three Cavities Were Collected Before And After Caries Excavation For The Bacteriological Assessment.

Results: The Visual Tactile Method Showed Lowest Reduction In The Bacterial Count Followed By Caries Detector Dye Followed By The Highest Reduction For Fluorescent Camera With A Statistically Significant Difference Between Each Other?s. Conclusion: The Light Induced Fluorescent Intraoral Camera Is More Effective In Removing Infected Dentin And In Reaching The Excavation Endpoint.

Yomna Saadi, Farid Medhat And Nashwa Salah ,

ABSTRACT

Objectives: The Purpose Of This Study Was To Evaluate The Presence Or Absence Of The Second Mesiobuccal Canal Of Permanent Maxillary First And Second Molars In An Egyptian Population Using Cone-beam Computed Tomography Scanning. Methods: The Study Was A Cross Sectional Retrospective Study Performed On 198 Maxillary First And Second Permanent Molars From 60 CBCT Scans Belonging To Egyptian Individuals. Radiographic Examination Was Done Using Cranex 3DX ? SOREDEX, Finland With Image Capture Parameters Set At?FOV Of 8 X 6 Cm, 90 KV, 10 MA And An Exposure Time Of 6 Seconds. The Voxel Size Was 0.2 Mm.

Results: A Total Of 198 CBCT Images Of Maxillary First (n?=?102) And Second Molars (n?=?96) From 60 Patients Were Analyzed. Frequency And Percentage Of The Presence Of 2nd Mesiobuccal Canal In The Whole Sample (198 Molars Of Both Females & Males) Was Interpreted By Three Oral Radiologists Independently Twice. The Results Showed That The Inter-rater Reliability For The Maxillary First Molars Was High (? = 0.8280), I.e. That The Three Observers Strongly Agree And For The Second Maxillary Molars Was Good (? = 0.7862), I.e. That The Three Observers Agree. The Results Also Showed For Observer 1, 2 &3 Highly Statistically Significant Intra-rater Reliability (P= <.0001). Conclusion: Within The Limitations Of This Study, It Can Be Concluded That The Prevalence Of The Second Mesiobuccal Canal In Maxillary First And Second Molars Is 43.4% In The Studied Patients Of Egyptian Population.

Ashraf Mohamed Desokey, Ahmed Gamal Ahmed And Emad Mohamed Tolba Agamy,

ABSTRACT
Objective: The Aim Of This In Vitro Study Is To Evaluate Strain Induced By Different Prosthetic Options Using Single Posterior Implant With Two Splinted Natural Abutments In Lower Unilateral Distal Extension Base Removable Partial Denture (Kennedy Class II).

Materials and Methods: In This Study An Epoxy Resin Model Was Used To Simulate A Class II Kennedy Edentulous Situation With Missing All Molars. The First And Second Premolars Were Splinted As The Main Abutments And An Implant Was Placed At The Site Of The Second Molar As The Distal One. Three Different Prosthetic Designs Were Constructed As Follows: -Group I: (cross Arch Stabilization Partial Overdenture). _ Group II: (side Plate Partial Overdenture). _ Group III: (fixed Partial Denture ( Load Application A Unilateral Ascending Load (25, 50, 75,100 N) Was Frequently Applied To The Selected Points Of The Abutments Over An Epoxy Resin Bite Block With The Loading Tip Of The Device In Axial And Non-axial Directions. Strain Gauges Were Cemented At The Following Areas (buccal And Lingual) To The Abutments And The Implant. (1) The Strain Meter Measure The Strain Every 25 N And Record It In Computer. (2) Five Minutes Were Left Between Each Loading As Period Of Rest To Allow For Heat Dissipation. (3) Every Load Was Applied 5 Times For Each Design And For Each Load Increment.

Results: The Total Stresses Recorded On Both The Implant And The Abutment Teeth In The Three Groups Showed That The Fixed Design Produced The Least Stresses Followed By Cross Arch Design And Maximum Stresses Were Rec Orded In Side Plate Design. The Maximum Micro Strain Range Recorded Under Axial Loading Was 283.662 Micro Strain Units, While Under Oblique Loading It Was 591.07 Micro Strain Units. No Failure Occurred In Any Part Of The Model. All Maximum Stresses Were Just A Fraction Of The Functional Loading Within The Biological Range (1). Conclusion And Clinical Significance: Within The Limitation Of The Current Study It May Be Conducted That The Use Of The Fixed Tooth- Implant Supported Partial Dentures Produced The Least Strain Among The Tested Designs, So It May Be Recommended In These Cases.

Nancy Sayed Abdel Aziz , Hesham Elansary And Lamia Kherialla,

ABSTRACT


Purpose: The Purpose Of This In Vitro Study Was To Evaluate The Marginal Accuracy And Internal Fit Of Zirconia Monolithic Crowns And Compare It To PEEK Monolithic Crowns, Milled By CAD/CAM. Methods: One Master Stainless Steel Die Resembling A Lower Second Molar Was Fabricated And Duplicated Using One-step Dual Viscosity Impression Technique. Twenty-two Auto Polymerizing Epoxy Replica Dies Were Digitized Using Extra-oral Optical Scanner, And Crowns Were Milled From PEEK And Zirconia Blanks. Internal Gap And Marginal Accuracy Measurements Were Recorded Using Silicone Replica Technique And Digital Microscope Respectively.

Results: For Internal Fit Results, It Was Found That Zirconia Group Recorded Statistically Non-significant Higher Internal Gap Mean Value Than PEEK Group As Indicated By Two-way ANOVA Test (P=0.> 0.05). For Marginal Accuracy Results, It Was Found That PEEK Group Recorded Statistically Significant Higher Marginal Gap Mean Value Than Zirconia Group As Indicated By Unpaired T-test (P=0.0206< 0.05). Conclusion: Both Materials Showed Marginal Accuracy And Internal Gap Values Within The Clinically Acceptable Values. However, PEEK Crowns Showed Superior Internal Fit And Inferior Marginal Accuracy To Zirconia Crowns.

Ahmed Mohamed Samy, Moustafa Ezz, Mohamed El Serougy And Ramy El Beialy,

ABSTRACT
Objective: The Aim Of This Study Was To Evaluate The Stability And Measuring Marginal Bone Loss In Early Loading Of Single Dental Implants In The Mandibular Posterior Area. Patients And Methods: The Study Sample Consisted Of 20 Patients Who Were Enrolled From Outpatients Clinic At The Department Of Oral And Maxillofacial Surgery, Faculty Of Oral And Dental Medicine, Cairo University

Results: This Study Was Conducted To Evaluate The Stability And Measure The Marginal Bone Loss In Early Loading Of Single Dental Implants In The Mandibular Posterior Area. A Total Of 20 Patients With Age Range 21-51 Years, 8 Males And 12 Females Participated In The Study. Conclusion: 1-The Implant Stability Increases After Early Loading Which Increases The Rate Of Success. 2-The Rate Of Marginal Bone Loss After Early Loading Is Adequate For The Success Of The Dental Implant.