Shaimaa MS El Hanafy, Dalia M Moheb , Osama I El Shahawy And Ahmad M Abd Alsamad .,

ABSTRACT
Background: Dental Caries Is The Most Prevalent Disease Worldwide. It?s One Of The Greatest Challenges To The Integrity Of The Developing Tooth. Indirect Pulp Therapy Is Proposed As An Alternative To The Usual Care For Carious Lesion Management. However There Is No Sufficient Evidence That Supports That Technique And Best Capping Materials. Methods: Randomized, Clinical Trial To Evaluate The Clinical And Radiographic Success Of Indirect Pulp Capping. Using Two-step Antibacterial Bonding System Versus Conventional One. This Study Was Carried Out On Thirty Six Children. Divided In Two Groups; One Group Had ?One Step? Indirect Pulp Capping Using Antibacterial Bonding, Another One Had The Same Treatment But With Conventional Bonding. Clinical And Radiographic Follow Up Was Carried Out Immediate Postoperative, Two, And Nine Months.

Results: By Statistical Analysis It Was Found That Both Groups Were Comparable In Postoperative Pain (p=1.000). As Regards Secondary Outcomes, Clinically; There Was No Pain On Percussion, Swelling, Or Sinus Tract. Radiographically; There Wasn?t Any Adverse Radiographic Findings. Conclusion: The ?One Step? Indirect Pulp Capping Technique Has Promising Clinical And Radiographic Success Over 9 Months Follow Up. Perfect Seal Regardless Of Capping Material Is The Key Of Success In Case Of Indirect Pulp Capping.

Hashim N.H, EL-Dokky N.A And Saber H.M,

ABSTRACT


Aim: This Study Aimed To Evaluate The Knowledge, The Attitudes And The Practices Of Minimal Intervention Dentistry (MID) In A Group Of Dental Interns In Egypt.

Materials and Methods: A Self-structured Questionnaire Was Distributed To Dental Interns To Gather Information About Demographics Background, Knowledge About MID In Addition To Dental Interns? Attitude And Practice. The Knowledge Questionnaire Covered Three Main Domains: Caries Risk Assessment, Prevention And Techniques.

Results: 146 Questionnaires Were Statistically Analyzed. The Response Rate Was (73%). The Mean Knowledge Score Of Dental Interns Regarding MID Was Fair (60.52%). They Exhibited Good Attitude Regarding MID With A Mean Score Of (84.15%) And Reported Fair Practice With A Mean Score Of (65.33%). Dental Interns Younger Than 23 Years Of Age Exhibited Significantly Better Knowledge And Attitude Scores (P= 0.001, 0.008). Dental Interns Who Attended All Previous Rounds Exhibited Significantly Better Knowledge Of MID (P=0.028). Dental Interns Who Graduated From Sinai University Exhibited A Significantly Lower Knowledge Grade (P=0.033). Dental Interns Who Attended The Fixed Prosthodontics Round Reported A Significantly Better Practice Of MID Than Those Who Did Not (P=0.043). There Was No Statistically Significant Difference Between Male And Female Dental Interns. There Was A Significant Positive Correlation Between Knowledge And Attitude Scores In This Survey. Dental Interns Showed Good Knowledge About Diagnostic Concepts Of Minimal Intervention Dentistry, But They Had Poor Knowledge Regarding Prevention And Treatment Techniques. Recommendations: There Is A Need To Improve The Undergraduate Dental Curricula Regarding MID. Further Studies Are Recommended To Explore The Needs Of Dental Students And Interns In Distant Provinces Of Egypt.

Hanan M. Abdullah , Laila S. Ghali And Radwa H. Hegazy,

ABSTRACT
The Present Investigation Aimed To Find Out The Impact Of The Diuretics On The Histological Structures Of The Gingival Mucous Membranes And The Immunohistochemical Localization Of The Proliferating Cell Nuclear Antigen In The Aforementioned Structures. Thirty Adult Male Albino Rats With Average Body Weight 150 � 10 Grams Were Divided Into Three Groups, 10 Animals Each. Group I, Served As Controls. Animals Received In Group II Acetazolamide (Diamox) In A Daily Oral Dose Of 8 Mg, And Furosemide (Lasix) In A Daily Oral Dose Of 40 Mg In Group III. The Specimens Were Processed To Be Embedded In Paraffin And Stained With Hematoxylin And Eosin For The Mucous Membrane Of Gingiva And PCNA Mouse Monoclonal Antibody For The Proliferating Cell Nuclear Antigen. The Results Revealed That Furosemide, Though Often Effective For Treating Hypertension, Should Have Significant Limitations Due To The Currently Reported Degenerative And Atrophic Changes Shown In The Gingiva. Acetazolamide, One Of The Carbonic Anhydrase Inhibitors Had The Least Degenerative Effects But Is A Weak Diuretic.

Mohamed Salah M. Fahmy Ali Hegazi, Magdy Mohamed Ali And Reham El Sayed Hassan,

ABSTRACT


Aim: The Present Study Was Performed To Evaluate The Post-operative Pain Reduction After Application Of Three Intracanal Medicament Within Necrotic Root Canals. Material And Method: Thirty Three Medically Free Patients With Necrotic Single Rooted Teeth Were Randomly Assigned Into Three Groups According To Intracanal Medicament Used; Conventional Calcium Hydroxide Paste, Calcium Hydroxide Nanoparticle And Combined Calcium Hydroxide With Silver Nanoparticle. After Opening Access Cavity And Completing Mechanical Preparation, Proper Irrigation And Dryness Of The Canals, Application Of Intracanal Medication Was Done. Patients Were Instructed To Record Their Postoperative Pain Level In Pain Chart (Numerical Rating Scale (NRS)) After 6, 24 And 48 Hours.

Results: There Was No Statistically Significant Difference Between The Three Groups At 6 And 24 Hours But There Was A Statistically Significant Difference Between Them After 48hours. Conclusion: The Combination Of Calcium Hydroxide With Silver Nanoparticle As Intracanal Medication Could Be Used As An Alternative For Reduction Of Postoperative Pain.

Alaa S. El-Ashkar, Maha A. Taymour And Adel M. El-Tannir,

ABSTRACT
Statement Of The Problem: The Precision Of Fit Of Chair-side CAD-CAM Zirconia Reinforced Lithium Silicate Crowns Is Still Under Research And The Effect Of Post Milling Protocol On The Marginal Adaptation Is Not Yet Clearly Stated In Literature.

Purpose: The Aim Of This Study Was To Evaluate The Marginal Adaptation Of Fully Crystallized Versus Partially Crystallized Zirconia Reinforced Lithium Silicate (ZLS) Ceramic Computer-aided Design/computer-aided Manufacturing (CAD/CAM) Fabricated Crowns Using Stereomicroscope.

Materials and Methods: A Total Of 16 Ceramic Zirconia Reinforced Lithium Silicate Crowns. They Were Divided Into Two Groups According To The Degree Of Crystallization. The Marginal Adaptation Of The Fully Crystallized Zirconia Reinforced Lithium Silicate CELTRA DUO (Dentsply, Sirona, Germany), Were Compared With The Partially Crystallized Zirconia Reinforced Lithium Silicate VITA SUPRINITY (VITA Zahnfabrik,Germany) After Its Crystallization. The 16 Crowns (n=8 Each Group) Were Fabricated Using A Chair Side CAD-CAM System. The Crowns And Die/crown Assembly Were Viewed Under Stereomicroscope. 36 Measurements Were Made For Each Crown, 9 Measurements On Each Surface. The Vertical Marginal Gap Was Directly Viewed And Measured Using Stereomicroscope. Data Were Recorded And Statistically Analyzed Using The T- Test And Two-way ANOVA Test. The Significance Level Was Set At P � 0.05.

Results: It Was Found That Partially Crystallized ZLS Crowns Recorded Statistically Significant Higher Marginal Gap Mean Value (99.52 � 6.67 �m) Than Fully Crystallized ZLS Crowns (85.88�3.79�m), (P=0.0002< 0.05). Conclusion: Within The Limitations Of This In-vitro Study, The Vertical Marginal Gap Values Were Within A Clinically Acceptable Range For All Tested Crowns. The Fully Crystallized ZLS Crowns Showed Better Marginal Adaptation Than The Partially Crystallized ZLS Crowns.

Bassima Edris , Lamiaa Sayed Kheiralla And Gihan Abd Elhady Elnaggar .,

ABSTRACT
Aim Of The Study: The Aim Of The Present Study Was To Compare The Marginal Integrity Of Occlusal Veneers Made From Hybrid Ceramic (Cerasmart) And Zirconia Reinforced Lithium Disilicate (Vita Suprinity) Under Thermal Cycling And Cyclic Loading.

Materials and Methods: A Standardized Tooth Preparation Was Applied To 34 Human First Maxillary Molars Using CNC Machine With Anatomical Occlusal Surface Preparation With 1 Mm Ferrule And 1 Mm Deep Chamfer Finish Line. All Teeth Were Restored With Occlusal Veneers With 1.8 Thickness At The Cusp Tip And 1.2 Mm At The Central Groove (CEREC AC CAD /CAM System). Hybrid Ceramic (Cerasmart) And Zirconia Reinforced Lithium Disilicate (Vita Suprinity) Were Used To Mill The Restorations (n=17). The Intaglio Surfaces Were HF-etched And Silanated (Vita Suprinity) Or Airborne-particle Abraded And Silanated (Cersasmart). All Restorations Were Adhesively Luted With Self Adhesive Resin Cement (Rely X Unicem). All Specimens Were Subjected To Thermal Cycling And Cyclic Loading For 25000 Cycles Simulate 2 Months. A Weight Of 5Kg Which Is Comparable To 50 N Of Chewing Force Was Exerted With Thermal Aging Between 5? C And 55? C. The Marginal Gap Distance Of The Specimen Was Photographed Using USB Digital Microscope With A Built-in Camera Connected With An IBM Compatible Personal Computer Using A Fixed Magnification Of 45X. Shots Of The Margins Were Taken For Each Specimen. Then Morphometric Measurements Were Done For Each Shot [4 Equidistant Landmarks Along The Cervical Circumference For Each Surface Of The Specimen (Mesial, Buccal, Distal, And Lingual). Measurement At Each Point Was Repeated Five Times. Then The Data Obtained Were Collected, Tabulated And Then Subjected To Statistical Analysis.

Results: The Marginal Gap Mean �SD Values Recorded For Vita-Suprinity Group Were (58.42�10.15 ?m) With Minimum Value (46.12 ?m) And Maximum Value (78.11 ?m). Meanwhile The Marginal Gap Mean �SD Values Recorded For Cerasmart Group Were (44.71�9.12 ?m) With Minimum Value (28.71 ?m) And Maximum Value (54.73 ?m).It Was Found That Vita-Suprinity Group Recorded Statistically Significant Higher Marginal Gap Mean Value (58.42�10.15 ?m) Than Cerasmart Group (44.71�9.12 ?m) As Indicated By Unpaired T-test (P=0.0084< 0.05). Conclusions 1. Hybrid Ceramic Restoration (Cerasmart) Provided Superior Marginal Accuracy Than Zirconia Reinforced Lithium Silicate (Vitasuprinity) Restoration. 2. All Occlusal Veneers Constructed From Both Tested Materials (Cerasmart And Vitasuprinity) Proved To Have A Clinically Acceptable Marginal Gap Distances.

Mohamed Magdy, Salma El Ashry, Hossam Tewfik And Ahmed Ghobashy .,

ABSTRACT


Introduction: Root Canal Treatment Yields A High Success Rate Reaching Above 90%. However, For Several Reasons, Including The Persistence Of Apical Periodontitis, Failed Cases Require Non-surgical Retreatment.

Aim: To Evaluate The Efficacy Of ProTaper Universal Retreatment Files Versus Mtwo Retreatment Files In Removing Gutta-percha Sealed In Curved Root Canals Using Two Types Of Sealers

Materials and Methods: A Total Of 40 Extracted Mandibular Molars With Mesio-buccal Canals Exhibiting Between 20 And 35 Degrees Of Curvature Were Mounted On Plastic Blocks. After Coronal Access Preparation, Root Canal Cleaning & Shaping Was Carried Out Using A ProTaper Universal System And Obturated Using Gutta-percha With 2 Different Sealers (zinc Oxide Eugenol Sealer, Epoxy- Resin Sealer). The Samples Were Pre-operatively Scanned Using Cone Beam Computed Tomography (CBCT). After 7 Days, Retreatment Procedures Were Performed Using Both Systems. The Retreatment Procedure Was Considered To Be Complete When The Last File Reached The Root Apex. Samples Were Postoperatively Scanned Using CBCT. The Samples Were Longitudinally Sectioned And Then Split Into Two Halves And Examined Under A Stereomicroscope, Followed By Photography And Assessment Using Image Analysis Software. The Percentage Of Remaining Filling Material In The Coronal, Middle And Apical Thirds Of The Canal Was Calculated In Mm�.

Results: Significant Differences Were Observed Between The Both Systems Regardless Of The Sealer Type. Either AH Plus Or TubliSeal Sealer, ProTaper System Showed Significantly Less Remaining Filling Material Than Mtwo System. A Difference Was Found Between Apical And Cervical Levels In ProTaper System And AH Plus Group, While In Mtwo System And AH Plus Group, A Difference Was Found Between Apical Versus Middle And Cervical Levels. Conclusion: Retrieval Of Root Canal Filling Material During The Retreatment Procedure Is Best Performed Using ProTaper Universal Retreatment Files. Caution Should Be Taken While Using The ProTaper Universal System In Order Not To Jeopardize The Remaining Dentin Thickness Of The Root Canal.

Ahmed Hassanein, Nihal Sabet And Mohamad Fakhr .,

ABSTRACT


Aim: Assess The Remaining Dentin Thickness During The Retrieval Of A Separated File Within A Root Canal Using Different Ultrasonic Tip Designs. Methods: 48 Extracted Maxillary Molars Having A Broken Rotary Nickle-titanium (NiTi) File In The Apical Third Of The Mesiobuccal Root Were Used In This Study. Teeth Will Be Divided Into Two Groups Of 24 Teeth Each; Group A, Non-diamond Coated E7 Endodontic Ultrasonic Tips Will Be Used To Retrieve The Separated Files. While Group B, Diamond Coated E7D Endodontic Ultrasonic Tips Will Be Used To Retrieve The Separated Files. Cone Beam Computed Tomography (CBCT) Scans Were Made Before And After The Procedure To Assess The Remaining Radicular Dentin Thickness In The Mesiobuccal Root At 3mm, 6mm, And 9mm From The Apex. Special Blocks Were Made Using Silicon Putty Impression Material To Standardize The Exact Position Of All The Samples During Pre-operative And Post-operative Dentine Thickness Measurements Using The CBCT Scanner. All Data Were Statistically Analysed.

Results: Group B Showed Statistically Significant Lower Remaining Dentine Thickness Than Group A At 3 Mm From The Apex. At 6 Mm And 9 Mm, There Was No Statistically Significant Difference Between Group A And Group B. Conclusion: Diamond Coated Ultrasonic Tips Are More Aggressive At Cutting The Radicular Dentinal Tissue Than Non-coated Ones. Water Coolant Does Not Affect The Amount Of Lost Radicular Dentine During Ultrasonic Activation.

Hoda Mostafa Omar , Amira Farid Elzoghbi And Maha Abd.Elsalam Elbaz,

ABSTRACT
This Study Was Conducted To Investigate The Influence Of Self-etch Conditioning On Micro-shear Bond Strength Of Different Types Of Glass Ionomers When Used Underneath Nano Filled Composite Restoration Compared To Direct Application Without Surface Treatment.

Materials and Methods: In This Study, 15 Glass Ionomer Cement Base Material Discs Were Prepared Using A Specially Designed Cylindrical Teflon Mold. Moreover A Total Number Of 84 Specimens Were Prepared And Divided Randomly Into 3 Groups (28 Specimens Each), According To Type Of Glass Ionomer Base Materials Either Nano Glass Ionomer, Zinc Containing Or Conventional Glass Ionomer Cement Base. Each Group Was Further Subdivided Into Two Groups (14 Specimens) According To The Surface Treatment Protocol To Glass Ionomer Disc: Either No Surface Treatment Or Using Self-etching Adhesive. Micro-shear Bond Strength Test Was Performed Using Universal Testing Machine And Mode Of Failure Was Assessed Using Digital Microscope And Classified Either Adhesive, Cohesive Or Mixed. Two Way- ANOVA Used In This Study Showed A Significant Effect On Mean Micro-shear Bond Strength (?SBS) (Mpa) At P�0.001 For Different Glass Ionomer Cement Base Materials And Surface Treatments.

Results: Results Showed That Higher Value Was Obtained When Using Self-etching Adhesive System As Surface Treatment Protocol With All Types Of Glass Ionomer. Nano Glass Ionomer Gave Higher Results In Comparison With Zinc Containing And Conventional Glass Ionomer Cement Base Materials.

Mohamed Mostafa Talaat, Hamed Gad And Abdullah Hammuda .,

ABSTRACT
Marsupialization Is Surgical Procedure Of Cutting Slit Into Cyst And Suturing The Cyst Wall With Mucosa To Remains The Window Open And Drain Freely, We Measured The Volume Of The Cysts Before And 3, 6, 9, Month After Decompression In 20 Radicular Cysts. The Velocity Of Volumetric Shrinkage In The This Groups Was Calculated. Relationships Between The Age Of The Patient And The Volumetric Shrinkage Velocity Were Investigated We Found That There Are No Significant Difference Between The Volumetric Shrinkage In Different Age After Marsupialization