Lotfy Elsayed Lotfy, Abeer Abd El-Aziz El-Gindy And Mohammad Osama M.Shawky,

ABSTRACT


Aim: The Current Study Aimed To Evaluate The Antibacterial Effect Of Curcumin, Photoactivated Curcumin In Comparison To Sodium Hypochlorite As Root Canal Irrigating Solutions Against Enterococcus Faecalis. Methods: Sixty Extracted Single-rooted Mandibular Premolars With A Closed Apex Were Cleaned, Disinfected And Prepared. E. Faecalis?were Inoculated In The Disinfected Root Canals Which Were Randomly Divided Into Four Equal Groups Each Of 15 According To The Type Of Irrigant Used [group (1): Saline, Group (2): 2.6% NaOCl, Group (3): Curcumin And Group (4): Photoactivated Curcumin]. Samples From Each Group Were Subjected To Microbiological Assessment At Two-time Points; Before And After Root Canal Treatment With Different Irrigating Solutions; To Detect Viable Bacterial Cells Using MTT Assay. Collected Data Were Then Statistically Compared To Determine Differences Between The Tested Root Canal Irrigants.

Results: After Using Tested Irrigant Solutions, Photoactivated Curcumin And Sodium Hypochlorite Showed A Significant Antibacterial Effect Better Than Curcumin And Saline.

Conclusions: Within The Limitations Of The Present Study, The Antibacterial Effect Against Enterococcus Faecalis Of Photoactivated Curcumin Is Comparable To 2.6% NaOCl Regarding Its Use As Root Canal Irrigating Solution.

Asmaa Salah El Din Abd El Samea Allam , Sara Ahmed Mahmoudand Sherif Bahgat Eltaweel ,

ABSTRACT
Objective: This Study Was Conducted To Assess The Clinical Efficacy Of Mouthwash Containing (Green Tea With Aloe Vera) Versus Chlorhexidine (0.2%) Mouthwash, On Oral Malodor (Halitosis) And Salivary Streptococcus Mutans Counts In A Group Of Egyptian Children. Subjects And Methods: A Randomized Controlled Clinical Trial Was Performed On 54 Healthy Egyptian Children Who Were Randomly Divided Into Two Groups (27 Patients In Each Group), The First Group Rinsed With (Green Tea With Aloe Vera) Mouthwash And The Second Group Rinsed With (chlorhexidine (0.2%)) Mouthwash. The Mouth Odors Of Children Were Assessed By Investigator Nose By Applying The Smell Identification Test (Organoleptic Measurement), At Baseline Zero Min (pre-rinse), 15 Min, 7 Days (post-rinse), Saliva Samples Were Collected From The Child?s Mouth At The Baseline Zero Min (pre-rinse) And After 90 Min (post-rinse) To Determine Streptococcus Mutans Colony Counts.

Results: The Result Showed That Malodor For Both Groups, Baseline Score Of Malodor Had The Highest Mean Value Of Whole Testing Intervals, Followed By 15 Minutes, Then 1 Week, And Also That There Was No Statistically Significant Difference Between The Two Types Of Mouthwashes Regarding Their Effects On Streptococcus Mutans Counts. Conclusion: Both Group (I) Green Tea With Aloe-Vera And Group (II) Chlorhexidine (0.2%) Mouthwash Were Effective In Reducing Oral Malodor And Had Antibacterial Effects.

Ahmed E. Dawoud*, Nahed A. A. Abo Hamila*, Hussein I. Saudi** And Neveen A. Shaheen***,

ABSTRACT

Objectives: To Compare Pulp Revascularization And Apexification In Immature Non-vital Permanent Incisors Related To Clinical Evaluation.

Materials and Methods: 30 Immature Permanent Incisors Of Children (7-9 Years Old) Had Irreversible Pulpitis Or Necrotic Pulp Were Selected And Randomly Divided Into 2 Groups; Group I: 15 Teeth Were Treated With Pulp Revascularization And Group II: 15 Teeth Were Treated With MTA Apexification. Each Tooth Was Completely Isolated With A Rubber Dam Then Access Opening Was Done. Irrigation Of The Pulp Chamber With 2.5% NaOCl Then Sterile Saline And Water. Then The Root Canal Was Dried With Paper Points And Triple Antibiotic Paste (TAP) Was Applied And It Was Removed By Saline Irrigation After Two Weeks. In Group I (revascularization) Bleeding Enhancement Was Done And MTA Material Was Applied Over The Formed Blood Clot While In Group II (apexification) The Whole Root Canal Space Was Filled With MTA. Finally, Pulp Chamber Was Filled With GIC Filling In Both Groups.

Results: There Were No Statistically Significant Difference Between Groups Regarding Clinical Evaluation Criteria.

Conclusions: Revascularization And MTA Apexification Techniques Resemble In All Clinical Criteria.

Amal Mohamed Basyouni *, Ali Mohamed El-sheikh** And Nahed Ahmed Kashief**,

ABSTRACT
The Aim Of This Study Was To Evaluate The Implant Supported Fixed- Detachable Mandibular Unilateral Distal Extension Bases With Two Different Cantilever Lengths Clinically And Radiographically.

Materials and Methods: 10 Partially Edentulous Patients With Mandibular Class II Kennedy Classification With Their Age Ranged From 25-55 Years And Divided In Two Groups. For Group I Had Received Two Implants At The Second Premolar And At The First Molar Regions. Three Unit Fixed Detachable Screw Retained Partial Denture With Distal Cantilever 7 Mm Was Fabricated. For Group II Had Received Two Implants At The Second Premolar And At The First Molar Regions. Three Unit Fixed Detachable Screw Retained Partial Denture With Distal Cantilever 10 Mm Was Fabricated. The Dental Implants Were Placed Using Conventional Delayed Loading Technique. Patients Were Recalled After 3, 6 And 12 Months As Regards To The Success And Survival Rate, Gingival Bleeding Index(GBI), Probing Pocket Depth(PPI) And Calculus Index(CI) And Radiographic Evaluation Of Marginal Bone Level (MBL) Using (Digora System).

Results: All Fixtures Were Successfully Osseointegrated By The End Of The Study. The Overall Cumulative Survival Rate Was 100%.Implant Level Technical Success Rate Was90% Group I And 80%.Group II. There Was Gradual Increase In The Clinical Parameters((GPI), (PPD) And (CI) And(MBL) From Baseline To The End Of The Evaluation Period. In Comparing The Mean Differences And Standard Deviations Between Both Groups There Was Non-significant Differences Throughout The Whole Evaluation Periods Except For The PPD Of The Implant At The Second Premolar And First Molar Regions At 12 Months Of Evaluation And CI Of The Implant At The First Molar Region At The 6 Months Of Evaluation Period.The Mean MBL For The Distal Surface Of The Implant At The Region Of The First Molar In Group II Was Non Significantly Higher Compared To The Same Implant In The Other Group At 12 Months Of Evaluation Period.

Conclusions: It Was Found That The Concept Of Cantilevered Implant Supported Fixed-detachable Screw Retained Prosthesis Was An Ideal Treatment To The Problem Of Class II Mandibular Kennedy?s Classification And Keeping The Size Of The Cantilever To The Mesiodistally Dimension Of 7 Mm Was Considered Satisfactory.

Ereny Isaac, Mona Riad And Mohamed Mostafa,

ABSTRACT


Aim: The Aim Of This Study Was To Evaluate The Effect Of Different Solvent Type Of Adhesive Systems Applied To Dry And Moist Dentin On The Microtensile Bond Strength Of Resin Composite To Dentin After 24 Hours And 3 Months Of Cyclic Loading.

Materials and Methods: A Total Of 60 Teeth Were Used In The Study. The Teeth Were Randomly Divided Into 3 Groups Of 20 Specimens Each (n=20) According To The Solvent Type Used (A), Single Bond Universal (ethanol-water), Futurabond M+ (ethanol) And Solobond M (acetone). Each Group Was Subdivided Into Two Subgroups Of 10 Specimens Each (n=10) According To Wet Or Dry Dentin Technique Used (D). Each Subgroup Was Divided Into 2 Classes Of 5 Specimens Each (n=5) According To The Number Of Received Cycles Of Mechanical And Thermo Cycling Loading That Represent 24 Hours And 3 Months (T). Adhesive System As Well As Composite Resin Application Was Done According To Manufacturer?s Instructions. Mechanical Aging Was Performed Using Programmable Logic Controlled Equipment (ROBOTA Chewing Simulator). Restored Teeth Were Serially Sectioned To Obtain Beam-shaped Specimens, With A Cross Section Area 1.0mm2. Results Were Tabulated And Statistically Analyzed Using Three-Way ANOVA Followed By Pairwise Comparison With Post Hoc Tukey Analysis And The Significance Level Was Set At P ? 0.05.

Results: Cyclic Loading Showed A Significant Effect On The Microtensile Bond Strength At P?0.026.The Different Adhesives Performed Almost In A Similar Manner In Dry & Moist Conditions After 24h Cyclic Loading Except For The Ethanol-water Based Adhesives Which Performed Better In Dry Condition Compared To The Moist One. Conclusion: Under The Limits Of The Present Study It Could Be Concluded That: The Solvent Type Of The Adhesive System Does Not Affect The Bond Strength. Ethanol-water Based Adhesive Systems Act Better When Applied To Dry Dentin Compared To Moist Dentin.

Heba Mahmoud Awad Mansour , Ahmed Hosny El Khadem , Ramy Ragab El Beialy And Emad Saeed Helmy,

ABSTRACT
This Review Is Performed To Describe The Minimally Invasive Techniques For Management Of Degenerative Temporomandibular Joint Diseases Mainly Osteoarthritis Regarding Pain And Mouth Opening Improvement. Population Included Patients With Primary Or Secondary Degenerative Joint Diseases. Patients Were Diagnosed With Degenerative Joint Disease Clinically And Confirmed With An Imaging Technique (MRI, CT Scan Or CBCT).

Shaimaa Mostafa Omar, Mohamed Farag Ayad And Mohammed Sedikk Mohammed,

ABSTRACT
Statement Of Problem: Most Clinical Failures Of Endodontically Treated Teeth Restored With Dowels Are The Result Of Cementation Failure At The Resin / Dentin Interface. Purpose : This In-vitro Study Evaluates The Influence Of Reinforced Dental Adhesive On Push-out Bond Strength Of Glass Fiber Dowels. Materials And Method: Thirty Freshly Extracted Human Upper Central Incisors Were Selected. All Root Canals Were Instrumented, Obturated And The Dowel Space Was Prepared To Depth 9 Mm. The Specimens Were Classified Into Two Groups According To Cementation Technique Of The Dowels. Group I: Self-etch Adhesive Cement. Group II: Self-etch Adhesive Cement With Bond Incorporate With Hydroxyapatite Nanoparticles. Relyx? Ultimate Resin Cement Was Used For Dowels Cementation. From Each Specimen, 3 Dowel/dentin Sections Were Obtained, Each 1-mm Thick. Three Sites Along The Root Were Evaluated (cervical , Middle And Apical). Specimens Were Submitted To Push-out Bond Strength Test Using A Computer Controlled Materials Testing Machine With A Load Cell Of 5 KN And Loaded At A Crosshead Speed Of 0.5 Mm/min. Data Were Analyzed With One-way Analysis Of Variance (ANOVA) And Independent T-test (? =0.05).

Results: The Bond Strength Of Fiber Dowels Affected By Hydroxyapatite Nanoparticles Incorporation. It Was Found That Experimental Group Recorded Statistically High Significant Mean Value (10.3?2.5 MPa) Than Control Group (8.3 ? 1.6 MPa) As Indicated By Independent T-test. Conclusion: Incorporation Of Hydroxyapatite Nanoparticles In Self-etch Adhesive System Increase Push Out Bond Strength Of Fiber Dowels In Comparison To Conventional Type.

Nesren M. Abo Elmagd Masry, Ahmed H Khalil And Rasha N M Sami ,

ABSTRACT
Statement Of Problem: All Ceramic Restorations Became A Popular Alternative To Esthetically Restore Missing Teeth. A Variety Of Different Cements Could Be Used For Cementation. Tooth Preparation With Different Convergence Angle Affect The Success Rate Of This Ceramic Restoration By Affecting The Cement Layer. However, The Quality Of The Selected Cement Cannot Be Evaluated Unless Determined After Being Subjected To Conditions Simulating Intraoral Stresses. Aim Of The Study: Was To Investigate The Route Of Failure Of Two Types Of Cement Lining Namely Glass Ionomer Conventional Cement, Rely X Ultimate Resin Adhesive Cement Under All Ceramic Crowns Fabricated From IPS E.max With Two Degrees Of Total Occlusal Convergence Namely, 10? And 18o. Materials And Methods Teeth Were Selected And Prepared By Computer Numerically Controlled CNC Milling Machine. A 5 Axis Line Scanner And Sirona Dental System Was Used For Ceramic Crown Fabrication, And Finally A (3D) Finite Element Model Was Constructed Under An ANSYS Environment. Fracture Resistance Was Measured With A Load Cell Of 6.5 KN By Instron Testing Machine. Two Way Analysis Of Variance ANOVA Test Of Significance Comparing Variables Affecting Mean Values (occlusal Convergence And Cement). One Way ANOVA Followed By Pair-wise Tukey?s Post-hoc Tests Were Performed To Detect Significance Interaction Between Subgroups. Statistical Analysis Was Performed Using Graph-Pad Statistics Software For Windows. P Values ? 0.05 Are Considered To Be Statistically Significant In All Tests.

Results: Regarding The Effect Of Occlusal Convergence Angle And Type Of Cement On Finite Element Analysis For IPS E.max Ceramic, Cement And Cortical Total Deformation There Was No Clinical Significance Difference Between The Two Types Of Cement At The Same Convergence Angle While Crowns, Root And Spongy There Is Moderate Clinical Significance Difference Between The Two Types Of Cement At The Same Convergence Angle. For Cement, Root, Crown, Spongy And Cortical Von Misses Stresses There Was A Clinical Significance Difference Between The Two Types Of Cement With 18o Occlusal Convergence Angle, Therefore 18oocclusal Convergence Angle Produced More Stresses On Cement Layer Than 10o Occlusal Convergence Angle. Regarding The Effect Of Cement Type On Fracture Resistance Of IPS E.max Ceramic Crowns, The Highest Bond Strength Was Obtained By Rely X Ultimate Cement, Which Was Statistically Significantly Higher Than Glass Ionomer Cement This Study Showed Less Prosperity For Cement Layer Failure And Crack Propagation.

Conclusions: Cementing IPS E.max -ceramic Crowns Using Adhesive Resin Cement Showed Superior Fracture Resistance Than Those Cemented Using Conventional Cement. Total Convergence Angle10ois Less Liable For Cement Layer Failure And Crack Propagation Than 18? Total Convergence Angle Of The Prepared Tooth In Order To Receive A Ceramic Crown.

Bahaaeldeen M. Elgarba, Ahmed Alam-Eldein And Mohamed M. El-Sheikh,

ABSTRACT


Purpose: The Purpose Of This In-vitro Study Was To Examine The Effect Of Cleansing Solutions On Surface Changes Of Retentive Clips Of Overdenture Bar Attachments.

Materials and Methods: 40 Yellow Hader Bar Clips Were Equally And Randomly Divided Into Two Groups According To Type Of Cleansing Solution(Tape Water And Corega), Each Group Divided Into 2 Equal Numbers According To Storage Time (1/2hour, 1hour). Each Tested Specimen Consist Of Two Parts Block A Contained Of Two Implants And The Bar In Custom Made Rectangular Acrylic Resin Block , Block B Contained Of Yellow Hader Clip And Metal Housing. Retention Force Was Measured Using Universal Testing Machine And Wear Of The Clips Were Checked Before And After Immersion In Cleansing Agents For 6 Months Simulation, The Clips Were Observed Under The Microscope Using Scanning Electron Microscope. The Peak Load-to-dislodgement Of The Specimens After Each Pull Was Recorded, The Data Were Collected And Analyzed By T Student-test And Analysis Of Variance (ANOVA) And Followed By Tukey?s HSDtest When P Value ?0.05 Considered Significant.

Results: There Was Decreacse In Retention Force After ? Hour And 1 Hour Immersion In Water And Corega But It Was Not Significant.Observation Of Plastic Clip Under Scanning Electron Microscope Indicated That Surface Changes As Cracks And Voids And Roughness Increase After 1/2 Hour And 1 Hour Immerssion In Both Water And Corega When Compared To The Initial Images.

Conclusions: Different Storage Times Of Denture Cleansing Solutions Corega Tabs And Water Have No Effect On The Retention Of Bar Overdenture Attachments. Scanning Electron Microscopic Revealed Surface Changes In Plastic Clips After Immersion In Corega And Water.

Mohamed M. Farag, Hesham M. El-Hawary And Mostafa M. Ezz,

ABSTRACT
Background And Objective: The Aim Of The Present Study Was To Assess The Bone Formation Around Dental Implants Placed Simultaneously In Posterior Maxilla Using Tutogen Xenograft Material Versus Autagenous Bone Graft. Patient And Method: The Lack Of Sufficient Height Of The Dental Bone In The Posterior Region Of The Upper Jaw Or The Expansion Of The Nasal Sinus Cavity Causes Many Difficulties When Trying To Replace This Area By Installing Dental Implants. It Was Found That The Increase In The Expansion Of The Nasal Sinus Cavity And The Accompanying Atrophy Of The Bone Has A Significant Impact On The Possibility Of Successful Implantation, And There Is No Doubt That The Length Of The Extraction Of The Tooth Has A Significant Impact On Atrophy Of The Dental Bone And Also The Expansion Of The Nasal Sinus In These Bones. This Study Included Twenty Number Of Implants Performed On Fourteen Male Patients Suffering From Atrophy Of The Posterior Jawbone Or Excessive Expansion Of The Nasal Sinus Cavity, Or Both. These Patients Were Chosen After Making Sure They Are Completely Free Of Any Organic Diseases That May Cause Any Complications During The Surgery Or Affect Bone Formation Around Implants. In This Study, The Nasal Sinus Was Raised By Making A Small Opening In The Upper Jawbones, The Side Wall Of The Nasal Sinus With Rotating Tools Under The Abundant Flow Of The Salt Solution, In Preparation For The Detection Of The Opaque Inner Layer Of The Nasal Sinus.

Results: The Results Of The Message Showed That The Value Of Measuring Bone Density Adjacent To Implants Increased During The Healing Period Of Dental Implants Except For Their Value During The First Month After Implantation. The Results Showed A Decrease In Bone Density. Conclusion: Within The Context Of This Study, The Following Conclusions Can Be Listed: The Placement Of The Implant Using The Lateral Window Technique Was A Predictable And Safe Procedure For Both For Patients And Surgeons. Tutogen As A Graft Material Had Shown A Good Results Regarding The Healing And Volumetric Changes Of The Graft As In Autogenous Bone Graft.