Heidar O. Shahin, Samir I. Bakry, Amir Azer And Mona M. Abd El-Latif,

ABSTRACT
Objective: The Aim Of This Randomized Controlled Clinical Trial Was To Evaluate 4-unit Posterior Full Contour Zirconia Fixed Partial Dentures (FPDs) Sintered In Microwave And Conventional Furnaces With Respect To Clinical Performance And Survival Of The FPDs.

Materials and Methods: Twenty Patients In Need Of One Posterior Four-unit FPD Replacing Mandibular Second Premolar And First Molar Were Included. Twenty FPDs Were Milled Using CAD/CAM System And Randomly Assigned Into One Of The Two Groups (n=10) According To The Sintering Technique (Group 1: Microwave Sintering And Group 2: Conventional Sintering). For The Clinical Evaluation At Baseline, 6 And 12 Months, USPHS Criteria Were Used.

Results: Twenty Patients Were Examined. At The 1-year Follow-up The Survival Rate Was 100% In Both Groups.

Conclusions: Monolithic Zirconia Can Be Used For The Construction Of Full Contour FPDs. Both Microwave And Conventional Sintering Of Zirconia FPDs Exhibited Good Clinical Outcomes Without Differences Between Groups. Microwave Assisted Furnace Can Be Used As A Valuable Alternative For Conventional Furnaces For The Sintering Of Monolithic Zirconia Restorations Without Hindering Zirconia Properties.

Eman Gamal Sobh, Salah Hasab Mahmoud, Michael Francis Burrow And Hamdi Hosni Hamama,

ABSTRACT
Glass-ionomer Dental Cements (GICs) Are Widely Used In Dental Clinics. They Are Aqueous Cements Formed By The Reaction Of An Acidic Polymer And A Basic Glass In The Presence Of Water. Glass-ionomer Cements Have Properties That Are Clinically Useful And Promote Longevity. Their Ability To Chemically Bond To Tooth Structure And Anti-cariogenic Effect Made Them Unique. Despite All These Advantages, GICs Have Some Drawbacks; Low Mechanical Properties, Moisture Sensitivity. GIC Limitations Has Led Researchers To Develop Many Modifications To Overcome Its Drawbacks. Many Changes And Modifications To The Basic Glasses And The Chemistry Of The Acidic Polymers Have Been Made. In This Review, All Modifications Of Glass Ionomer Will Be Discussed.

Mahmoud Usama El-Masry, Omniya Abdelaziz And Ragia Mounir,

ABSTRACT
Mineralized Plasmatic Matrix That Is Also Termed Sticky Bone Graft Is A Bone Graft Material With Structural Stability Rich With Growth Factors That Enhances Bone Regeneration Process, Technique Of Preparation Is Easy, Cost Effective, Maintains Grafted Bone Volume During The Period Of Healing Of Guided Bone Regeneration Surgeries. The Goal Of The Present Study Was To Evaluate And Assess The Effectiveness Of Mineralized Plasmatic Matrix (MPM) Versus Autogenous Bone Graft In Horizontal Ridge Augmentation Of Upper Deficient Anterior Region Together With Implant Insertion. Methods:Nine Patients With Total 20 Implant Sites Who Fulfilled Specific Inclusion Criteria Were Assigned Into Two Groups. According To The Surgical Technique Used, In The Study Group Implants Were Placed In The Horizontal Bony Defect In The Maxillary Anterior Alveolar Ridge, The Exposed Threads Were Covered By MPM, In Control Group Threads Were Covered With Autogenous Bone Graft And Collagen Membrane.Facial Horizontal Bone Width (FHBW) Was Assessed Immediate Postoperatively And After 5 Months In Both Groups Using Cone Beam Computed Tomography.

Results: Bone Loss Was Recorded In Both Groups After 5 Months Healing Time In Both Groups , Facial Horizontal Bone Width Loss Was Less In Cases Of The Study Group (mean 1.4 Mm), Compared To (1.6 Mm) In Control Group That Was Found Statistically Significant, P Value (0.047).

Radwa Ibrahim El-Tahwi, Enas Fathelbab Abdelhalim And Shams Waaz Amgad .,

ABSTRACT

Objectives: The Purpose Of This Study Was To Assess The Retention Strength Of Resin Nano Ceramics And Polyetheretherketone After Different Surface Treatments.

Materials & Methods: Forty Human Upper Central Teeth Were Prepared For Crowns And Divided Into Two Main Groups According To The Type Of Material Used; Twenty For Lava Ultimate And Twenty For Bio HPP. Each Group Was Further Divided Into Four Subgroups; 1) No Treatment, 2) Airborne-particle Abrasion With 50 ?m Alumina, 3) Airborne-particle Abrasion With110 ?m Alumina, And 4) 5% HF Acid Etching For 20 Sec. Thereafter, Crown Specimens Were Luted To Dentin Abutments Using Self-adhesive Resin Cement RelyX U200 And Stored In Water For 60 Days. All Specimens Were Thermocycled (5000 Cycles, 5�C To 55�C). Retention Strength Of Crowns Were Measured Using Pull-off Test In A Universal Testing Machine. Subsequently, Failure Types Were Determined Using SEM. Data Were Analyzed With 2-way And 1-way ANOVA Followed By Tukey?s Post Hoc Test.

Results: There Was No Significant Difference Between Retention Strength The Two Tested Materials. Air-abrasion With 50 ?m Alumina Recorded The Highest Mean Values For Maximum Pull Out Load (N) Followed By Air-abrasion With 110 ?m Alumina, HF Acid Etching, And Control Group, Respectively.

Conclusions: Airborne-particle Abrasion With 50 ?m Alumina Before Cementation Enhances Retention Strength Of Both RNC And PEEK Crowns. Adhesive Failure Mode At The Cement-dentin Interphase And Cohesive Within The Ceramic Material Denoted Adequate Bonding Between The Tested Materials And Luting Agent.

Shaimaa Sayed Ahmed, Enas Fathelbab Abdelhalim And Shams Waaz Amgad,

ABSTRACT

Objectives: The Study Evaluated Color Stability Of Two Machinable Restorative Materials, Resin Nano Ceramics (Lava Ultimate, 3M ESPE) And Poly Ether Ether Ketone Ceramics (Bio HPP, Bredent GmbH) After Immersion In Different Staining Solutions (coffee, Tea, Pepsi And Distilled Water As Control Group).

Materials and Methods: Forty Upper Central Teeth Were Prepared For Crowns And Divided Into Two Main Groups According To The Type Of Material Used; Twenty For Lava Ultimate And Twenty For Bio HPP. Each Group Was Subdivided Into Four Subgroups Five Specimens Each To Be Immersed In Three Different Staining Solutions; (coffee, Tea And Pepsi( And Distilled Water As Control Group, For Color Stability Test After A Month Using Spectrophotometer.

Results: A Statistical Insignificant Difference In Color Change Mean Values Was Found Between Lava Ultimate Group And Bio Hpp Group, Coffee Showed The Highest Mean Value Of Color Change Followed By Tea Then Pepsi. Conclusion: Resin Nano Ceramic Materials Are More Susceptible To Discoloration Than PEEK Ceramics. Coffee Has The Highest Ability To Stain Restorative Materials.

Kareem Abd El Hamid Lotfy, Heba Salah El Din Hamza And Dina Wafik Elkassas,

ABSTRACT
Objective: The Aim Of This In Vitro Study Was To Evaluate The Penetration Efficacy Of A Caries Infiltrant Resin With Different Etching And Application Times.

Materials and Methods: Ninety Sound Human Incisors Were Immersed In A Demineralizing Solution In Order To Create Artificial Subsurface Carious Lesions. Specimens Were Divided Into Three Equal Groups According To Etching Time [30, 60,90 Sec] Then Further Divided Into Three Subgroups According To Application Time [4, 3+1, 2+1 Min]. After Application Of The Infiltrate Resin, Specimens Were Embedded In Transparent Scaffolds And Sectioned. Specimens Were Immersed In A 100�Mj/sodium Fluorescein For 3 Hours. Digital Images Were Obtained Using Light Stereo Microscope At 120x. Results Were Analyzed Using ANOVA Test.

Results: Etching Time Had No Significant Effect On The Depth Of Penetration Of The Resin Infiltrant Material. However Significant Difference Between Different Application Times (P<0.0001) Was Evident. Using 30sec. Etching Time, The Highest Significant Mean Value Was Recorded In 4min Application Time, Whereas The Lowest Significant Mean Value Was Recorded In 2min Application Time. Conclusion: Application Time Is A Crucial Factor That Affects The Penetration Depth Of The Resin Infiltrant Material.

Asmaa Yousry Tawfiq, Hoda Abdel Kader Saleh And Salma Belal Eiid,

ABSTRACT


Purpose: To Investigate The Diagnostic Accuracy Of Ultra Low Dose-Cone Beam Computed Tomography Protocol In Detection Of External Root Resorption In Mandibular Teeth.

Materials and Methods: Twenty Extracted Human Mandibular Intact Roots Were Recruited In This In-vitro Diagnostic Study. Simulated Resorptive Defects Of Various Standardized Sizes (0.5mm-0.9mm-1mm) Were Drilled On Each Root Using Inverted Cone Burs With Different Sizes Mounted On Low Speed Hand-piece. Some Sites Were Left Intact On Each Root To Act As Control Sites. The Total Number Of Simulated Defects Was 180 Distributed Randomly On Different Root Surfaces, While A Total Of 60 Sites Were Left Intact. Prepared Roots Were Fitted Into Corresponding Sockets Of A Mandible To Be Scanned By Ultra Low Dose-Cone Beam Computed Tomography Protocol (90 Kvp, 5.6 MA, 4 Seconds) Using A 0.2 Mm Voxel Size And A Field Of View 4x5 Cm .

Results: Ultra Low Dose-Cone Beam Computed Tomography Protocol Had An Overall Sensitivity Of (71%), And Overall Specificity Of (96%). The Diagnostic Accuracy In This In Vitro Study Was (77%). The Positive Predictive Value Recorded Was (98%), While The Negative Predictive Value Was (52%). The Positive Likelihood Ratio Was (18) And The Negative Likelihood Ratio Was (0.3). Conclusion: Ultra Low Dose-Cone Beam Computed Tomography Protocol Could Be Used For Detection Of External Root Resorption With Comparable Diagnostic Accuracy To Standard Protocols But With Significantly Less Radiation Dose.

Ahmed Ahmed Rashed Alfar, Mohammed Abd Alaleem Bushnaq, Somia Abd Allateef Eissa And Eman Mohie Eldin Elsayed,

ABSTRACT
The Aim Of The Study: The Aim Of This Observational Study Was To Compare The Severity And Type Of Malocclusion In Caries-positive Versus Caries-free Adolescents.

Materials and Methods: Ninety Six Subjects In The Age Range Of 12-19 Years Old Were Recruited And Classified Into Two Groups; Caries-positive And Caries-free Groups. Age, Sex And Socioeconomic Status Were Matched In The Two Groups To Control These Confounding Factors. Caries-positive And Caries-free Groups Were Compared As Regard To Severity And Type Of Malocclusion. Dental Aesthetic Index (DAI) Was Used To Assess The Severity And Type Of Malocclusion. Decayed Missing And Filled Teeth (DMFT) Was Used For Assessment Of Dental Caries.

Results: There Was No Significant Difference Between Caries-positive And Caries-free Groups As Regards To The Percentage Of Minor, Definite, Severe And Very Severe Malocclusion. There Was No Significant Difference Between Caries-positive And Caries-free Groups In DAI Score Or In Any Component Of DAI. Conclusion: Severity And Type Of Malocclusion Had No Correlation With Dental Caries

Yasmine Y. Gaweesh, Maha A. Abu Khadr Mahmoud M. Fata, Islam M. Abdel Raheem And Nourhan M. Aly .,

ABSTRACT

Objectives: Evaluation Of A Newly Performed Modification In Digital Volumetric Analysis Used To Assess Volume Changes After Soft Tissue Volume Augmentation Using Subepithelial Connective Tissue Graft In Localized Horizontal Ridge Defects Methodology: The Study Was Designed As A Single Armed Clinical Trial Including 13 Localized Horizontal Ridge Defects. Soft Tissue Volume Augmentation Using Subepithelial Connective Tissue Graft Was Performed In The Ridge Defects. Impressions Were Taken At Baseline, 10 Days, 1 Month, 2 Months And 3 Months Follow Up. The Casts Were Optically Scanned, Digitized And Transferred To Stereolithography (STL) Files. Casts Of Each Defect Were Superimposed, Trimmed Together, And The Volume Of The Defect Area Was Measured By The Software. Afterwards, Volume Gain Was Calculated At Each Follow Up Time Point. Descriptive Analysis Was Computed And Paired T Test For Normally Distributed Variables Was Used To Compare The Baseline And Last Follow Up.

Results: The Mean Volume Of The Defect Site Was 727.38 � 290.72 Mm?, And 783.46 � 298.48 Mm? At Baseline, And 3 Months Follow Up, Respectively With A Statistically Significant Volume Increase. The Final Volume Gain Between Baseline And 3 Months Follow Up Was 57.46 � 18.22 Mm? With A Statistically Significant Difference From The Initial Volume Gain.

Conclusions: The Modified Method Of Volumetric Analysis Is An Accurate Method For Assessing Soft Tissue Volume Augmentation That Is Easy To Standardize.

Manal Sayed Abdel Latief , Sara Ahmed Mahmoud And Sherif Bahagt Eltawil,

ABSTRACT
The Aim Of The Present Study Was To Assess The Effect Of Garlic With Lime Extract Mouthwash On Gingival Bleeding, Dental Plaque Formation And Salivary Streptococcus Mutans Counts In A Group Of Egyptian Children, And Compare Its Effect With 0.2 % Chlorhexidine Mouthwash. The Study Includes A Total Of 36 Children Aged From 9 To 12 Years, Divided Randomly Into Two Groups: Group A (garlic With Lime Extract) And Group B (chlorhexidine). The Plaque And Saliva Samples Were Taken, Then They Were Instructed To Rinse For 14 Days, Twice Daily With 10 Ml Of The Assigned Mouthwash For 30 Second. Again After 14 Days, The Saliva And Plaque Samples Were Taken And Inoculated On Blood Agar Plates To Determine The Streptococcus Mutans Count. We Found That There Was A Statistical Significant Difference Between Streptococcus Mutans Counts In Dental Plaque And Saliva Before And After Using Garlic With Lime Extract Mouthwash (P<0. 001 And P<0. 0001; Respectively). Similarly There Was A Statistically Significant Decrease In Bleeding After The Study (P<0.0001). There Was A Statistical Significant Difference Between The Two Mouthwashes Regarding Their Effects On Streptococcus Mutans Counts In Dental Plaque (p= 0.0001). However, There Was No A Statistical Significant Difference Between The Two Mouthwashes Regarding Their Effects On Streptococcus Mutans Counts In Saliva And Bleeding (p= 0.428 And 1.00; Respectively). The Conclusion Is That The Efficacy Of Garlic With Lime Exctract Was Higher Than Chlorhexidine In Decreasing Gingival Bleeding. It Is An Effective Antibacterial Mouthwash On Streptococcus Mutans Counts In Dental Plaque And Saliva.