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.

Mostafa K. Abdo, Mohamed G. Elshal, Nessren M. Abd El-Rady And Wael M. Refai,

ABSTRACT
Objective: To Study The Effect Of Gentamycin (aminoglycoside) Antibiotic Administration On Orthodontic Tooth Movement.

Materials and Methods: The Study Was Conducted On Twenty Male Rabbits. They Were Divided Into Two Groups. Control Group In Which Only Orthodontic Tooth Movement (OTM) Was Conducted And The Gentamycin Group In Which Rabbits Were Given Gentamycin IM Injections In Regular Doses (3-5 Mg/kg/day) And OTM Was Conducted. Appliance Was Applied To The Lower Right Side. A Closed Coil Spring Was Connected Posteriorly To The First Premolar And Anteriorly To The Central Incisor. Animals Were Sacrificed After 21 Days. The Lower Right Halves Of The Mandible Of All The Animals Were Prepared For Specimen, Decalcified And Prepared For Histological Evaluation To Detect Changes In Osteoblastic And Osteoclastic Activity.

Results: There Were No Significant Changes In The Rate Of OTM Between Both Groups. Conclusion: Aminglycoside Antibiotics Are Safe To Be Administered During Orthodontic Treatment As They Do Not Alter The Bone Metabolism Yet Care Should Be Taken For Their Adverse Affect On The Kidneys.

Kareem Shafik Diab, Magdy Mohamed Mohamed Aly And Dalia Ali Ahmad Moukarab,

ABSTRACT
Objective: The Purpose Of This Study Was To Evaluate And Compare The Regenerative Potential Of Platelet Rich Fibrin And Plasma Rich In Growth Factors In Regeneration Of Mechanically Removed Coronal Pulp In Mature Teeth Histologically. Methods: Pulpotomy Was Performed In 24 Teeth From 2 Dogs, And The Pulp Chambers Were Filled With The Following Materials: (a) Groups 1: Platelet Rich Fibrin PRF; (b) Groups 2: Plasma Rich In Growth Factors PRGF. After 14 Days (groups 1/14-2/14) And 35 Days (groups 1/35-2/35), The Animals Were Euthanized And The Pieces Containing The Teeth Were Removed And Processed For Histological Analysis.

Results: Dentine Bridge Was Not Observed. The Radicular Pulp Response In Group 1/14 And Group 2/14 Consisted Generally Of Blood Vessels Dilatation, Diffusion Of The Platelet Concentrates Components, Areas Of Vacuolation Of The Odontoblastic Layer, Areas Of Pulp Tissue Disintegration And Fibrosis While In Group 1/35 And 2/35 These Findings Were Less Prominent Except For Fibrosis And Calcified Tissue Formation. Conclusion: The Observations Of This Study Might Help Develop A Predictable, Safe, And Cost-effective Vital Pulp Therapy Strategy, However Further Long Term Investigation And Research Is Needed To Reach More Conclusive Results About Their Possible Application In Human Patients.

Osama Abdelaziz Alafifi, Hamida Refai Hassanien And Osama Taema,

ABSTRACT


Aim: The Objective Of This Study Is To Examine The Benefit Of An Intra-articular Platelet-rich Plasma (PRP) Injection And To Compare This With Arthrocentesis In Patients With Temporomandibular Disc Displacement With Reduction. Patients And Methodes: Twenty Four Patients Who Did Not Respond To Conservative Treatment Of Anterior Disc Displacement With Reduction Were Included In This Study. They Were Randomly Allocated To One Of Two Study Arms: The ?intervention? Group Who Treated With Intra Articular PRP Injection Or The Control Group Who Treated With Arthrocentesis.

Results: In This Study, Both Groups Showed Significant Improvement In TMJ Pain, Maximum Mouth Opening (MMO) And Clicking 2 Weeks After Treatment That Maintained Thereafter. Conclusion: It Is Possible To Conclude That Intra-articular PRP Injection Was Equivalent To Arthrocentesis Regarding Reduction Of TMJ Pain With More Beneficial Effects Of Arthrocentesis On MMO And TMJ Sound.

Laura Yehia Zanati , Mohammed Adel Ezzat And Shereen Hafez,

ABSTRACT


Aim: To Evaluate The Effect Of Arginine Versus Fluoride Containing Toothpaste On The Neutralization Of Microbial Acid Produced By Cariogenic Bacteria In Adult Population Using Chair Side Assessment Method.

Materials and Methods: A Total Number Of 14 Volunteer Participants Were Assigned Into This Study. Since It Is A Linear Cross Over Trial, All Subjects Were Exposed To Two Types Of Toothpaste In Two Phases. The Salivary PH Was Assessed According To Time In Relation To The Brushing With Toothpaste Before Brushing With Toothpaste And 10 Minutes After Brushing With Toothpaste.

Results: The PH Results Of The Current Investigation Revealed That For Resting PH (Baseline); Fluoride Toothpaste (5.49?0.83) And Arginine Toothpaste (5.54?0.85), Results Showed Insignificance Differences At P=0.876. The Same Applied For Terminal PH, Fluoride Toothpaste (5.69?0.76) And Arginine Toothpaste (5.94?0.79), Where Results Showed Insignificance Differences At P=0.389. Conclusion: Fluoride Containing Toothpaste As A Gold Standered Has The Ability To Neutralize The Acidic PH Of Saliva In High Caries Risk Patients And Arginine Containing Toothpaste Provided Similar Buffering Capacity As Fluoride Containing Toothpaste. However, The Immediate Efficacy Of Arginine Solely In Arginine Containing Toothpaste Was Not Revealed In This Study Over Fluoride Containing Toothpaste.