Eman Saber Bekhit, Neveen Abdel Latife Askar, Nessrine Mohamed Khairy And Omniya Abu El-Dahab,

ABSTRACT


Aim: To Evaluate The Efficacy Of The Bioactivation Of Dental Implant With Platelet Rich Plasma (PRP) For Immediate Loading Implantation Using Periapical Digital Radiography And Clinical Parameters. Methodology: The Present Study Was Conducted On Fourteen Patients (four Males And Ten Females) For Implantation Of 28 Implants .The Ages Ranged From 23 To 56 Years And The Mean Of Ages Was 39.5. They Were All Complaining From Posterior Mandibular Teeth Loss. All Patients Were Subjected To Preoperative CBCT Examination That Was Done By Planmeca ProMax 3D Mid CBCT Unit To Assess Buccal And Lingual Wall Heights And Contours. Insertion Of Platelet Rich Plasma (PRP) Coated Implants And Immediate Loading Of Them Was Performed. After Two Months, Clinical And Radiographic Evaluations Were Performed For The Implants. The Digital Images Were Used To Assess The Implant Height, The Intimate Contact Between Implant And Bone And The Bone Density.

Results: There Was A Statistically Significant Change In The Distribution Of Cases According To Modified Gingival Index In Two Months And Six Months Compared To One Week Between The Two Groups. There Was No Statistically Significance Between The Two Groups At Different Times. Conclusion: The Use Of Platelet Rich Plasma (PRP) Coated Implant Showed Good Results Of Preserving Crestal Bone And Adequate Soft Tissue Healing In Immediate Loading In Restoring Of Posterior Mandibular Teeth.

Marwa Essam EL Dein, Nagla M.H. Nassouhy And Hamdy Abo El Fotooh,

ABSTRACT
Aim Of The Study: To Compare The Retention Of Removable Partial Denture Clasps Made From Thermoplastic Resin Material (acetal And PEEK) And Cobalt Chromium Clasps Using The Universal Testing Machine. Methodology: An Acrylic Resin Model Of Kennedy Class III Was Fabricated To Receive Unilateral Partial Denture Frameworks With Aker Clasps. The Abutments Were Covered With Surveyed Crowns With 0.01 Inch Buccal And Lingual Undercuts. Twelve Partial Denture Frameworks Were Fabricated From Co-Cr, Acetal And PEEK , Four Frameworks Per Group. For Measuring Retention, Universal Testing Machine Was Used, The Vertical Pulling Force Was Applied At The Cross Head Of Speed 0.5 Mm/min Until Disengagement Of The Clasp Occur. The Results Will Be Recorded In Newton On A Computer Display And Printed Out.

Results: A Statistically Significant Difference Was Found Between Co-Cr, Acetal And PEEK Groups Where (p<0.001). A Statistically Significant Difference Was Found Between Co-Cr Group And Each Of Acetal And PEEK Groups Where (p<0.001) Respectively. While No Statistically Significant Difference Was Found Between Acetal And PEEK Groups Where (p=0.992).The Highest Mean Value Of Retention Was Found In Co-Cr Group Followed By PEEK Group, While The Lowest Mean Value Was Found In Acetal Group. Conclusion: Within The Limitations Of This Study, It Was Concluded That The Mean Retentive Force Required To Remove Thermoplastic Clasps (acetal And PEEK) Was Lower Than That Required For Co-Cr Clasps Of The Same Thickness And Engaging 0.01 Inch Undercut.

Mostafa Kamal Abd El Latif, Ibrahim Abd Allah Mohammed , Amany Hussein Nemat And Tarek Ibrahim El Ghareeb .,

ABSTRACT
Objective: The Aim Of This Study Was The Clinical Evaluation Of Intraligamentary Injection Technique Using Computer Controlled Anesthesia ?single Tooth Anesthesia System ?STA? Versus ?Cito-ject ?? Syringe In Extraction Of Posterior Mandibular Teeth. Patients And Methods: One-hundred Patients - 16: 50 Years Old - Were Selected Randomly To Be Included In The Present Study With Different Genders And Extraction Purpose. All Patients Had No Systemic Conditions That May Affect Bleeding And Healing Of Extraction Wounds Or Action Of Anaesthesia And Had At Least Two Mandibular Posterior Teeth In Need To Be Extracted In One Or Both Sides. Each Patient (or His Parent) Signed Consent For Accepting To Be Involved In The Present Study.

Results: The Results Of The Present Study Showed No Significant Difference In Gender, Age And Tooth Type. Moreover The Results Showed That There Was No Significant Difference In Blood Pressure, Heart Rate, Bleeding, Healing And Also In Pain During Injection And Extraction. Moreover, STA System Had Faster Onset Of Anesthesia, Pain After Extraction And Handling..

Ibram Ibrahim , Mona Riad And Mohamed Mostafa .,

ABSTRACT


Aim: The Aim Of This Study Was Evaluate The Effect Of Mechanical Loading Of Resin Composite Bonded To Dentin In Different Levels Using Fluoride Containing And Conventional Non-containing Self-etch Adhesive Systems On Its Bond Strength.

Materials & Methods: A Total Of 40 Teeth Were Used In The Study. The Teeth Were Randomly Divided Into 2 Groups Of 20 Specimens Each (n=20) According To Bonding Material Used, Clearfil? S3 Bond Plus And Clearfil? SE. Each Group Represented The Two Dentin Depth Levels (D), The (D1) Represented Superficial Dentin Level And (D2) Represented Deep Dentin Level. Each Group Was Divided Into 2 Subgroups Of 10 Specimens Each (n=10) According To The Number Of Received Cycles That Represent 24 Hours And 3 Months (T). Adhesive System As Well As Composite Resin Application Were 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. Data Were Analyzed By Kolmogorov?Smirnov Test For Test Of Normality. Three-way ANOVA Was Used To Show The Effect Of Different Adhesive, Cycling And Dentin Depth On Microtensile Bond Strength Followed By Pairwise Comparison With Bonferroni Correction (�=0.05).

Results: Load Cycling And Dentin Level Showed A Significant Effect On Microtensile Bond Strength At P�0.001 And 0.022 Respectively. The Effect Of Fluoride Containing Adhesive On Microtensile Bond Strength Was None Significantly Different From Conventional Adhesive.

Conclusions: Sodium Fluoride Incorporated In The Adhesive System Did Not Hinder Bonding Of Resin Composite To Dentin In Both Superficial And Deep Dentin.

Soha S. Gad, Hany M.Omar And Ahmed M. Abdalsamad .,

ABSTRACT
Objective: This Study Is To Evaluate The Accuracy Of Digital Panoramic Radiography With Different Frankfort Plane Orientations And CBCT In Linear Measurement As Well As Postoperative Dental Implant Assessment.and Answer The Question If Digital Panoramic Radiograph With Different Frankfort Plane Accurate As Cone-beam CT And Which Is Better For Post-operative Dental Implant Assessment? Material And Method : The Study Was Performed On Seven Dry Mandibles, Free From Any Fractures Or Pathological Lesions. Either Edentulous Or Partially Edentulous In Each Mandible, Three Endo-osseous Implants Were Inserted In One Side While In The Other Side Three Sites Were Marked Using Gutta Percha Cones Which Were Fixed To The Buccal Surface Of The Mandible Using Adhesive Strips. In Each Prepared Implant Site, An Acrylic Resin Mixed With Barium Sulphate In A Ratio Of 4:1 Was Inserted Before Implants Insertiont. In Each Site Marked With Gutta Percha, The Vertical Height Of The Mandible Was Measured Using A Digital Caliper. Then Each Mandible Was Imaged Using Digital Panoramic Radiography And Cone Beam Computed Tomography. Conclusion: Linear Measurements Driven From CBCT Images Are More Accurate Than Measurements Driven From Panoramic Images, Panoramic Image Is Ideal For Postoperative Implant-bone Interface Assessment Compared To CBCT Image.

Abdullah Ahmed F. M. Elmasry, Ahmed M. Abd Alsamad And Mushira M. Dahaba .,

ABSTRACT

Objectives: The Present Study Was Designed To Assess The Accuracy Of Surgical Guide Designed From Dental Model Optical Scan Versus Impression Inversion With Markers Techniques In Computer Guide Implantology

Materials and Methods: In Our Study, Twelve Patients (one Males And Eleven Females) With Age Range From 22 To 46 Years Were Selected From Outpatient Clinic, Faculty Of Dentistry, Cairo University. Patients Were Selected According To Inclusion And Exclusion Criteria To Assess Their Eligibility For The Study. Twelve Guides (with Sixteen Implants) Were Designed For The Patients

Results: For Surgical Guides Manufactured Using Dental Model Optical Scan And Impression Inversion With Markers, There Was An Excellent Agreement Between Both Observers Regarding All Measurements As Intra-class Correlation Was Higher Than 0.75 Except For Buccolingual Deviation Cervically Which Was Good. This Emphasizes On The Accuracy And Reproducibility Of The Measurements? Steps In Our Study. For Linear Accuracy In BL Direction, There Was No Statistically Significant Difference Between Median Linear Deviation With Surgical Guides Fabricated By Both Techniques. For Angular Accuracy In BL Direction, There Was No Statistically Significant Difference Between Median Linear Deviation With Surgical Guides Fabricated By Both Techniques. Conclusion: There Was No Significantly Clinical Difference Was Found In Linear And Angular Accuracy Between Surgical Guides Fabricated From Dental Model Optical Scan And Surgical Guides Fabricated From Impression Inversion Surgical Guides Fabricated From Impression Inversion Showed Higher Range Of Deviation Than Surgical Guides Fabricated From Dental Model Optical Scan.

Karim Abdel Rahman Sallam, Wafaa Ahmed Omar Segari And Farid Medhat Farid,

ABSTRACT


Aim: The Aim Of The Current Study Was To Evaluate The Canal Transportation And Centering Ability Of HyFlex EDM In Comparison To Reciproc Using CBCT.

Materials and Methods: Twenty-six Curved Mesiobuccal Canals Of Human Extracted Mandibular Molars With A Range Of Curvature From (25o- 40o) Were Selected And Assigned Into Two Equal Groups. Access Cavities Were Prepared, Distal Halves Of The Teeth Were Discarded And The Mesial Halves Were Used For The Study. The Occlusal Surface Of The Samples Was Reduced So That The Sample Length Was Fixed To 17 Mm And Working Length Was Adjusted To Be 16mm. The Samples Were Scanned By CBCT After Being Mounted On Customized Acrylic Base And Then Rescanned After The Instrumentation Using The Exact Scanning Protocol. Root Canals Of Each Group Were Prepared Following The Manufacturers? Instructions Using OneFile And R25 Instruments For Hyflex EDM And Reciproc Groups Respectively. The Software OnDemand 3D App Was Employed To Superimpose Pre- And Post-instrumentation Scans Using The Fusion Module. Axial Slices Were Taken From Both Scans At 3 Mm, 5 Mm And 8 Mm From The Root Apex. The Change In Dentin Thickness Was Measured From Both Scans Simultaneously. Canal Transportation Values As Well As The Centering Ability Of The Instruments Were Evaluated Based On Two Formulae Developed By Gambill Et Al. Data Was Statistically Analyzed Using Mann-Whitney Test For Comparisons Between The Two Groups. A P-value Less Than Or Equal To 0.05 Was Considered Statistically Significant.

Results: The Results Showed That The Transportation Value Of Hyflex EDM Was Not Statistically Significantly Different From Reciproc At All Root Canal Levels. The Centering Ability Of The Two Instruments Is Similar Except At 3mm From The Apex; Hyflex EDM Was Statistically More Centered Than Reciproc.

Conclusions: Within The Limitation Of This In Vitro Study, It Can Be Concluded That Hyflex EDM Can Prepare Severely Curved Mesiobuccal Root Canal With Amount Of Transportation That Is Approximately Similar To Reciproc. Although, Hyflex EDM Was Significantly More Centered Than Reciproc At 3mm From The Tooth Apex.

Ahmed Tarek Mohamed Salah , Nivin Askar And Mohamed Atef,

ABSTRACT
Horizontal Ridge Deficiency In The Anterior Maxilla Represents One Of The Challenging Situation In Bone Regeneration. Guided Bone Regeneration (GBR) Has Become A Major Treatment Option For Such Deficiency To Provide Optimal Bone Quantity For Installation Of Endosseous Dental Implants. However, There Is A Good Prognosis For This Treatment, As The Residual Ridge Height Can Be Used To Stabilize A Bone Graft, Making It Less Subjectable To Move Which Is One Of The Factors That May Lead To Graft Failure. Numerous Technique In Guided Bone Regeneration Have Been Introduced Using A Varies Types, Combinations Of Grafting Materials And Different Types Of Barrier Membranes Either Rigid, Non-rigid Or Resorbable, Non-resorbable Materials.

Nancy El Salmawy, Nancy A. El Salmawy, Norhan A. El Dokky, Manal A. El Sheikh And Eithar K. El ?Adham,

ABSTRACT


Aim: Clarify The Prevalence Of Early Childhood Caries In Egyptian Children With Serum Vitamin D Deficiency, Determine If Vitamin D Deficiency Is A Risk Marker For (ECC). Patients And Methods: The Study Was Conducted On 294 Egyptian Children Ages From 2-5 Years Of Age With Serum Vitamin D Deficiency Attending Abo El Rish Hospital, Malnutrition Clinic, Cairo University. Structured Questionnaire Was Done Followed By An Oral Examination And Laboratory Investigation For Confirmation And Standardization Of Results.

Results: The Percentage With Vitamin D Deficiency Was More In Girls Than In Boys. The Prevalence Of Early Childhood Caries In Egyptian Children With Serum Vitamin D Deficiency Was High .The More Prevalent Early Childhood Caries Stage Was The Deep Stage. No Significant Statistically Difference Between Insufficient And Deficient Vitamin D Serum Level And Bleeding On Brushing.

Conclusions: Vitamin D Deficiency Is A Risk Marker For Early Childhood Caries. The Finding Highlighted The Value Of Providing Consistent Message About The Importance Of Vitamin D To The Public.

Arwa Mabrouk Issa, Nadia A Abbas And Ahmad Fayyad .,

ABSTRACT
This Study Aimed To: Compare The Biting Force By Using (I Load Sensor) In Class III Modification I Maxillary Partially Edentulous Patients Wearing Removable Partial Dentures Constructed From Two Different Injectable Thermoplastic Materials PEEK And BRE.FLEX (second Edition).

Materials and Methods: Forty Patients Having Kennedy Class III Modification I Maxillary Partially Edentulous Ridges With Fully Dentate Mandibular Arch Were Divided Into Two Equal Groups To Fabricate The Thermoplastic Materials. The First Group Received Bre.Flex Material. The Second Group Received PEEK Material. The Biting Force From Two Groups Were Measured By Using (I Load Sensor): At The Time Of Denture Insertion, After Two Weeks And After Four Weeks Of Denture Insertion. The Collected Data Were Tabulated And Statistically Analyzed.

Results: Showed That The Difference Between The Two Groups Was Statistically Significant Was Reported Between Two Groups Regarding Biting Force. Conclusion: Within The Bre.Flex Group, The Biting Force Has Increased As The Follow Up Period Increased. Within The PEEK Group, The Biting Force Has Decreased As The Follow Up Period Increased. The PEEK Group Showed A Greater Biting Force Than The Bre.Flex Group In All The Follow Up Periods And The Difference Was Statistically Significant.