Esraa Khairy Morsy, Enas Anter Abdel Ghafar And Sahar Hosny El Dessouky,

ABSTRACT

Objectives: The Study Aimed To Assess The Accuracy Of Linear Measurements On Three-dimensional (3D) Volume Rendered Images Generated From Cone Beam Computed Tomography (CBCT) In Comparison With Two-dimensional Multiplanar Reformatted Slices (2D MPR).

Materials and Methods: 16 Dry Human Skulls Were Scanned Using Planmeca Promax 3D Mid CBCT Machine, 23 Anatomical Landmarks Were Selected And Marked On Each Skull Using Gutta-percha Pieces, 14 Linear Measurements Were Taken Between Them Using Digital Caliper. Using A Third Party Software (In Vivo 5) The Same Linear Measurements Were Assessed On Both 3D VR Images And 2D MPR Ones. The Absolute Measurement Error �AME Was Assessed For Both Image Types, Then Compared Using Paired T-test.

Results: Paired T- Test Comparison Between ME Values Of Both Image Types Showed That Non-statistical Significant Difference Between Them Expect For MN Width� And �Me-POG�. Conclusion: Linear Measurements On Both 3D VR And 2D MPR Images Are Reliable And Accurate When Compared With Direct Caliper Measurements With Slight Higher Accuracy In 3D VR Images.

Abdallah Hassan M.; Manal M. Hosny And Rasha Wagih Mostafa .,

ABSTRACT

Objectives: To Clinically Evaluate Toothpaste Containing 8% Arginine, Calcium Carbonate And Sodium Mono-fluoro-phosphate In Comparison To Other Containing 8% Strontium Acetate And Sodium Fluoride On The Relief Of DH In Chronic Periodontitis Patients. Methods: 46 Patients With Slight To Moderate Chronic Periodontitis Were Randomly Assigned To One Of Two Groups And Followed Up For 8 Weeks. All Patients Received Full Mouth Mechanical Debridement. Air Blast Test And Cold Water Test Were Assessed Using Schiff Scale And VAS Score Respectively. Clinical Parameters Plaque Index (PLI), Gingival Index (GI), Probing Pocket Depth (PPD), Clinical Attachment Level (CAL) Were Recorded.

Results: Significant Reduction In Median Schiff Scores After Treatment With 33.3% Reduction From Baseline For Both Groups, With No Significant Difference Between Them. For VAS Scores, The Arginine Group Reported Earlier And Significant Improvement In Sensitivity To Cold Water Stimulus That Reached 55%. In The Strontium Group The Onset Of Reduction In Sensitivity Started From Week 3 And Reached 25%. Statistically Significant Difference Between The Two Groups Started From Week 7 Only. Conclusion: The Use Of 8% Arginine Toothpaste Twice Daily For 8 Weeks Produced Earlier And More Significant Reduction In Perception Of DH According To VAS Scores In Chronic Periodontitis Patients. No Significant Difference Between The Two Agents Could Be Detected In Relevance To Changes In PPD, CAL, PLI And GI.

Mohamed Omaia Ahmed, Maged M. Negm, Yousra M. Nashaat, Nehal N. Abdelaziz And Amal S. Othman,

ABSTRACT
Background: The Elimination Of Intracanal Microorganisms Is Essential For The Long-term Success Of Root Canal Treatment. This May Be Achieved By Mechanical Cleaning And Shaping In Conjunction With Irrigation And Antibacterial Agents. The Aim Of This Study Was To Assess The Ability Of Triple Antibiotic Paste With Diclofenac Potassium Anti-inflammatory Drug Versus Calcium Hydroxide Used As Intra-canal Medication In Reducing Intracanal Bacterial Count. Methods: 84 Patients With Asymptomatic Uniradicular Necrotic Teeth Were Randomly Assigned Into Two Groups According To The Intra-canal Medication Used: Calcium Hydroxide Group (CH) And Triple Antibiotic Paste With Diclofenac Potassium Anti-inflammatory Drug Group (TAPC). After Isolation, Access Cavity Was Performed Followed By Chemo-mechanical Preparation Using Rotary Protaper Universal Files With Saline Irrigation. Bacteriological Samples Obtained From The Root Canals Before (S1) And After Instrumentation (S2) In The First Treatment Session. Subsequently, Intra-canal Medication Was Placed And Bacterial Reduction Was Assessed In The Second Session After 3 Days (S3) Using Colony Forming Unit Test.

Results: Both Intracanal Medicaments Showed A Statistically Significant Bacterial Count Reduction From S2 To S3. TAP+Catafast Intracanal Medication Achieved Significant Bacterial Count Reduction Compared To That Of Ca(OH)2. Conclusion: The Use Of Triple Antibiotic Paste With Diclofenac Potassium Anti-inflammatory Drug As Intracanal Medication Was More Effective Than That Of Calcium Hydroxide In Asymptomatic Uniradicular Necrotic Teeth.

Hassan Mohamed Salah; Manal Mohamed Hosny; Olfat Gameel Shaker And Rasha Wagih Mostafa .,

ABSTRACT

Objectives: The Aim Of The Present Study Was To Evaluate The Possible Effect Of Vitamin E Administration As An Adjunct To Scaling And Root Planing On GCF Levels Of Malondialdehyde And Clinical Parameters In Patients With Chronic Periodontitis. The Adjunctive Effect Of Vitamin E Was Compared To Scaling And Root Planing Alone. Methods: Thirty-two Patients With Chronic Periodontitis Participated In This Study. They Received Scaling And Sub Gingival Debridement With Either Administration Of Vitamin E (Group I) Or Placebo (Group II). The Primary Outcome Was To Measure The Level Of Malondialdehyde (MDA) In Gingival Crevicular Fluid (GCF) Using The Quantitative Sandwich ELISA Technique. In Addition, Clinical Parameters Such As PLI,GI, PPD And CAL Were Recorded At Baseline And 3 Months After Treatment. Results The Mean Difference Between Baseline And 3 Months Scores Presented Significant Difference Between The 2 Groups With Respect To CAL And PD. The Test Group Presented More Gain In CAL (0.78mm Versus 0.46mm) And More Reduction In PD (0.81mm Versus 0.41mm). The Test Group Presented Higher Reduction In GCF Level Of MDA 3 Months Posttreatment. However, The Difference Between Groups Did Not Reach Statistical Significance. Conclusion: Scaling And Root Planing Significantly Reduced GCF Levels Of MDA 1 And 3 Months After Treatment Compared To Baseline Values. The Adjunctive Administration Of Vitamin E Produced Higher Reduction In GCF Levels Of MDA 3 Months After Treatment In Comparison To Control Group. The Adjunctive Administration Of Vitamin E Produced More Significant Reduction In Full Mouth Scores For PD And More Significant Gain In Full Mouth Scores For CAL 3 Months After Treatment.

Radwa M. Fayez , Jealan M. El Shafei And Alaa El Baz,

ABSTRACT
Objective: The Objective Of This Study Was To Assess And Compare The Effect Of Calcium Hydroxide/ Nano Silver Particulate Combination Intracanal Medicament Versus Calcium Hydroxide Intracanal Medicament On Postoperative Pain In Cases With Necrotic Pulp. Subject And Methods: Forty Patients With Necrotic Pulp In Anterior Teeth Were Included. After Through Clinical And Radiographic Diagnosis, Patients Were Enrolled Into Two Equal Random Group Each Of 20 Patients. All Caries Were Removed And The Pulp Chamber Was Accessed With Sterile High Speed Carbide Burs Under Sterile Saline Irrigation, Standard Endodontic Treatment Was Performed In Two Visits Using Rotary Nickel Titanium Files For Shaping, 2.5% Sodium Hypochlorite For Cleaning. Using Lentulo Spiral Filler, Medicaments Were Placed Under Aseptic Conditions Into The Canals According To Each Group At The End Of The First Visit, Lateral Condensation Technique With Resin Sealer For Obturation Was Done 7 Days Later. Pain Was Assessed Pre-operatively, Then After 6, 12, 24 And 48 Hours After Root Canals Obturation. Numerical Rating Scale (NRS) Was Used As The Primary Outcome Measure. Patients Were Given Analgesics To Be Administrated In Case Of Emergency. All Demographic Data And NRS Scores Were Collected From The Patients And Statistically Analyzed.

Results: Results Showed That There Was No Statistically Significant Difference In Pain Incidence Between The Two Groups After 6 Hrs. However Combining Pain Categories (mild And Moderate) The Comparison Between 2 Groups Become Statistically Significant. There Was No Significant Difference In Incidence Of Analgesic Intake Between The Two Groups.

Conclusions: Nano Silver Seems To Have A Good Potential To Be Used As An Appropriate Vehicle Of Ca (OH) 2 In Order To Reduce The Incidence Of Post-operative Pain In The First 24 Hours Following Root Canal Treatment.

Nourhan A. El-Maghrabi, Yehia S. Aboushady And Seham A. Hanafy,

ABSTRACT
Objective: The Aim Of This Study Was To Evaluate The Effect Of Sintering, Surface Treatment And Different Types Of Cements On The Shear Bond Strength Of Zirconia-reinforced Lithium Silicate Restorations.

Materials and Methods: Forty Specimens Of Zirconia-reinforced Lithium Silicate Of 10 Mm In Diameter And Thickness Was 2mm Were Randomly Divided Into Two Groups (N=20), One Group Was Cut And One Surface Polished While The Other Group Was Cut And Sintered. Each Group Was Randomly Subdivided According To The Method Of Surface Treatment; One Group Was Sandblasted While The Other Group Was Sandblasted And Etched With Hydrofluoric Acid And Luted To Composite Cylinders By Using Two Types Of Resin Cements: A Dual-curing (Calibra Resin Cement) And Dual-curing (Panavia V5) Adhesive Systems According To The Manufacturer�s Instructions. Specimens Were Thermo-cycled Between 5�C And 55�C In Water For 500 Cycles, Shear Bond Strength Test Was Performed In A Universal Testing Machine At 0.5 Mm/min Until Failure Occurred. All De-bonded Samples Were Examined Under A Stereomicroscope To Identify The Failure Mode.

Results: The Effect Of Type Of Surface Finish (sintered /one Surface Polished) Within The Specimens Showed That Sintered Provided Higher Bond Strength Than One Surface Polished . On Comparing Between The Type Of Surface Treatment Sandblasted Or Sandblasted + Hydrofluoric Acid Etched And Silanation Used In Each Subgroup, The Sandblasted Followed By Hydrofluoric Acid Etched And Silanation Provided Higher Bond Strength Than Sandblasted . Moreover, Calibra Resin Cement Provided Higher Bond Strength Than Panavia V5 Resin Cement.

Conclusions: It Was Concluded That The Type Of Surface Finish, Surface Treatment And Type Of Resin Cement Had A Significant Effect On The Shear Bond Strength Of Zirconia Reinforced Lithium Silicate Ceramics.

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.