Mohamed Riyad AlShikh, Sanaa Soliman Abouzeid, Eman Mohie-Eldin And Rayan Almurtada,

ABSTRACT


Introduction: Effect Of Extraction On The Orthodontic Practice Was Claimed To Cause Decrease In The Airway Diameter And Affect The Hyoid Bone Position. Other Researchers Contradicted This Finding. The Aim Of The Study Was To Systematically Review The Literature To Resolve This Conflict.

Materials and Methods: The Study Included The Clinical Trials, Cohort Studies, Published And Unpublished Thesis And Literature. The Data Bases Searched Included Pubmed, Cochrane, LILACS, And Grey Literature Until 31/12/2017. Total Records Included 1139 Articles. The Participants Were At Least 15 Years Old, With And Pre And Post Cephalometric Radiographs Or CT Scans And Undergone First Premolar Extractions.

Results: Only Two Studies Included The Qualitative Synthesis. Conclusion: The Studies Showed The Orthodontic Extraction Changed The Hyoid Bone Position.

Ahmed Nabil Fahmi, Hanan Eid, Amr H. Gibaly And Mohamed Mostafa Elshamaa,

ABSTRACT
Dermoid Cysts Are Soft Tissue Cysts Of Embryonic Origin That Arise Along Lines Of Skin Fusion. They Formed Due To Abnormal Ectodermal Sequestration During Early Embryological Life. The Variable Types Of Craniofacial Dermoid Cysts May Be Related To The Initial Position Of Ectodermal Inclusion Within The Underlying Mesoderm. Variations In The Degree Of Ectodermal Inclusion Result In Differences In The Histology And Structure Of Dermoid Cysts At The Various Craniofacial Sites. Such Histologic Differences May Directly Influence The Severity Of Clinical Presentation. Five Cases Of Periorbital And Submental Dermoid Cysts Were Operated On Under General Anesthesia; All Cases Were Subjected To Immunohistochemical Staining With Cytokeratin, Vimentin And Chromogranin. There Was Significant Correlation Between The Expression Of Chromogranin In Periorbital And Submental Dermoid Cysts (P=0.007), While There Was Nonsignificant Correlation Between The Expression Of Cytokeratin In The Two Lesions (P= 0.08) And Also Nonsignificant Correlation Between The Expression Of Vimentin In The Two Lesions (P=0.43). Objective To Differentiate Histologically And By Using Immunohistochemitry Between Submental And Periorbital Dermoid Cysts.

Yasmin Hefnawy, Jylan Fouad El-Guindy And Lamyaa Khair Allah,

ABSTRACT
The Aim Of This Study: Was To Measure The Fracture Resistance In Endodontically Treated Teeth Restored With Lithium Disilicate Crowns Retained With Fiber Posts And Core Compared To VITASUPRINITY And CERASMART Endocrowns. Statement Of The Problem: The Risks That Increased The Potential Of Tooth Fracture After Endodontic Treatment, The Risks Included Loss Of Tooth Structure, Post Canal Preparation, Post Selection. Endocrowns Were Revealed To Fail More When Fixed To Premolars. The Influence Of Different Crown Material On Fracture Resistance Of Ceramic Crowns Placed On Endodontically Treated Maxillary Premolars Has Not Been Clearly Established. RESEARCH QUESTION: In Endodontically Treated Maxillary Premolars Will Teeth Requiring (VITASUPRINITY) And Hybrid Ceramics (CERASMART) Endo Crowns Provide Better Fracture Resistance Compared To Lithium Disilicate Ceramic Crowns Retained With Glass Fiber Posts? Hypothesis: 1. Endo-crowns Will Have More Fracture Resistance Than Lithium Disilicate Crowns Retained With Fiber Postsand Composite Core. 2. Endocrowns Restoration Made Of VITASUPRINITY Material Would Show More Fracture Resistance Than Endocrowns Made Of Hybrid Ceramics CERASMART. Conclusion: 1. Both VITASUPRINITY And CERASMART Endocrowns Are As Promising As Fiber Post And Composite Core Supported IPS E.max CAD Crowns. 2.Favourable Mode Of Fracture Of VITASUPRINITY, CERASMART Endocrowns And Fiber Post And Composite Core Supported IPS E.max CAD Crowns Since The Fracture Was Mostly Above CEJ ?repairable?. 3. All Fracture Resistance Loads Obtained Were Far Beyond The Maximum Masticatory Forces, Which Can Withstand The Maximum Intraoral Masticatory Forces In The Maxillary Premolar Region.

Rana A. Abdulatif And Cherif A.Mohsen,

ABSTRACT
Objective: The Aim Of This Study Is To Evaluate In An In Vitro Study, The Influence Of Straight And Angulated Implant In Lower First Molar And Upper Central Incisor On The Fracture Resistance And Failure Location Of Zirconia Crowns Fabricated Using CADCAMtechnology.

Materials and Methods: In This Study 20 Casts Were Used , Epoxy Resin Mixed And Loaded In The Sockets, Then Implant Was Loaded And Fixed Into All 10 Missed Lower Molar And 10 Upper Central Incisor. According To Position Of Implants The Samples Divided Into Two Groups Anterior And Posterior. Each Group Divided Into 2 Subgroups (5 Samples Each) According To The Degree Of Abutment Angulation Straight Abutment And 15 Degree Angulation. The Specimens Were Then Subjected To Compressive Loading By Universal Testing Machine (Shimadzu Autograph AG-50kNE, Shimadzu Co., Ltd, Japan) . The Force Required (N) To Cause Fracture Of The Crown, And The Mode Of Failure Were Recorded Using A Classification Designed For The Investigation.

Results: The Mean Values �SD Of Loads At Failure (n -5) For Each Group Were As Follows In Newton (N): Posterior Straight Angle (A- I) 1361.6�245.3-,posterior 15 Angulation,(A-II) 1820.6�168 , Anterior Straight Angulation(B-I) 1117.5�112, Anterior 15 Angulation (B-II) 1435�135.9 0There Was Significant Increase In The Maximum Resistance At Angle 15 Compared With Angle 0 At Anterior E And Posterior Site.(p<0.05). Conclusion: Within The Limitations Of The Invitro Study, The Following Can Be Concluded: (I) Angulation 150 Abutment Increases Fracture Resistance Of The Overlaying CAM-milled Zirconia Single Crowns Than Straight Abutment. (II) All The Values Of Fracture Resistance Obtained In This Study Were Higher Than The Average Of Normal Occlusal Forces . (III) There Was Insignificant Difference Between The Posterior And Anterior Sites At Straight And Angulated.

Aya A. Hamzawy, Omneya M. Wahba And Iman S. ElShamy,

ABSTRACT
Background: Oral Cancer Represents 3% Of All Body Lesion With High Mortality Rate And Poor Prognosis. Lymph Node (LN) Metastasis Is One Of The Most Important Prognostic Factors Related To Survival Of Oral Squamous Cell Carcinoma (SCC). Overexpression Of Metastasis-associated Protein 1 (MTA1) Has Been Demonstrated In A Variety Of Human Cancers And Significantly Associated With The Tumor Size, Lymph Node Metastasis, Clinical Stage, Tumor Invasion, And Prognosis Of These Cancers; However, Its Role In Determining Lymph Node Metastases In Oral SCC Remains Unclear. OBJECTIVES: Detect And Compare The Expression Patterns Of MTA1 Immunohistochemically In Metastasizing And Non-metastasizing Oral SCC. MATERIALS AND METHODS: MTA1 Expression Was Detected Immunohistochemically In 40 Oral SCC Specimens And The Correlation With LN Metastasis Was Evaluated. RESULTS: Upregulation Of MTA1 Nuclear Expression Had A Significant Correlation With LN Metastasis But Not With The Histologic Grade Of The Tumor. CONCLUSIONS: The Present Study Suggests That Increased MTA1 Epithelial Cell-expression At The Invasive Front Reflects Its Potential Role During Invasion And Metastasis. Whereas, Nuclear Expression Of MTA1 Can Be Used A Predictor Of SCC Aggressiveness.

Ragia Mounir , Omniya Abdel Aziz And Khaled Jamal,

ABSTRACT
The Use Of Mineralized Plasmatic Matrix Derived From Autogenous Bone In Grafting Of The Residual Socket (socket Preservation) Aims To Preserve The Bone At The Same Level And To Regenerate New Bone With Better Quality As Compared To Socket Preservation Using Particulate Autogenous Bone Graft. The Goal Of The Present Study Evaluate And Assess The Effectiveness Of Mineralized Plasmatic Matrix (MPM) Versus Autogenous Bone Graft In Socket Preservation In Mandibular Anterior And Premolar Area. Methods:Ten Patients With Total 20 Extraction Sites In Lower Anterior And Premolar Area Who Fulfilled Specific Inclusion Criteria Were Assigned Into Two Groups Group A(Study Group), Group B (control Group). According To The Surgical Technique Used, In Study Group MPM Was Placed In Extraction Sockets Of Mandibular Anterior And Premolar Region, In Control Group Extraction Sockets Were Grafted With Autogenous Bone Graft, After 3 Months And Comparison And Implants Were Placed And Standardized X-ray Was Performed, Three Months Later Another X-ray Was Taken To Compare Crestal Bone Loss In Both Groups.

Results: Bone Loss Was Assessed In Both Group After 3 Months Following Implant Placement And Showed No Significant Difference.

Dalia Walid Mamdouh , Mahmoud Hamdy And Rania Abd Allah Nasr,

ABSTRACT
Objective: To Assess The Satisfaction Of Pediatric Patients And Their Caregiver, Taken From 3 Different Health Care Services Towards The Quality Of The Dental Care Services. Subjects And Methods: A Stratified Random Cross Sectional Observational Study Was Conducted At The Pediatric Dentistry Department At Faculty Of Oral And Dental Medicine Cairo University, Governmental Hospital And Medical Center At Ministry Of Health On 510 Patients (267 Girls And 243 Boys), Modified PSQIII (Patient Satisfaction Questionnaire III) Was Used To Collect The Data From The Caregivers.

Results: There Was No Association Between The Satisfaction Score And Sociodemographic Variables, There Were More Girls At Faculty Of Oral And Dental Medicine 100 Girls (58.8%) Compared To Medical Center 76 Girls (44.7%) And Governmental Hospital 91 Girls (53.5%), Pediatric Patients In Governmental Hospital With Mean Age( 7.7) Years Are Older Than Other 2 Groups, The Highest Satisfaction Score Was At The Faculty Of Oral And Dental Medicine With (Median Score=4) Conclusion: Pediatric Patients And Their Caregivers Were Satis?ed With The Mean Of Communication With The Dentist And Interpersonal Aspects, Time Spent With The Dentist And Technical Quality. Access, Availability, Waiting Time And Waiting Room Were Identified As Reasons For Dissatisfaction.

Mohamed S. Elbehairy, Nora Cheta, Tamer M. Nassef And Hamdy A. Hamed,

ABSTRACT
Background Comparing The Effect Of Implant Inclination On Stress Distribution In Peri-implant Bone In Mandibular All On Four Hybrid Prosthesis. Material And Methods Bone Model Was Reconstructed From CBCT Scan Segmentation, Implants And Cad/cam Prosthesis Were Exported As STL Files And Converted Into Solid Parts By Reverse Engineering Followed By Part Assembly, Meshing And Load Application. Results A Large Decrease In Von-mises Stresses Was Observed In The Model With 30 Degrees Tilted Implants. Conclusion Model D30 Was The Best Treatment Design Regarding Stress Distribution Compared To The Other Two Models.

Moataz Moktar, Eman Mohie, Fady Fahim And Amr Labib .,

ABSTRACT
Objective: To Detect Influence Of Bend-back Of The NiTi Wires During Leveling And Alignment On The Maxillary Incisors.

Materials and Methods: The Sample Comprised 42 Females And Males Aging About 20+2 Years. They Were Randomly Allocated Into Two Groups: Control Group (A) And Intervention Group (B) With Bend-back Of All Leveling Arch Wires. Lateral Cephalomtric Radiographs Were Performed And The Data Were Statistically Analyzed.

Results: Significant Increase In The Maxillary Incisors? Proclination Was Manifested In Both Groups, Where There Was Increase In The U1/PP, U1/NA And U1-NA(mm) Measurements.

Conclusions: Bend-back Of The Niti Wires During The Leveling And Alignment Stages Did Not Prevent Or Decrease The Incisors? Proclination Of The Maxillary Incisors.

Yasmine Nader Elsayed Matter, Manar Yehia Fouda And Hany Samy Sadek .,

ABSTRACT


Aim: Is To Compare The Effect Of Pulpotec And Ca(OH)2 Intra-coronal Dressing On Inter-appointment Pain Relief For Symptomatic Posterior Teeth With Acute Pulpitis With Periodontitis.

Materials and Methods: The Trial Design Is A Parallel Double Blind Randomized Controlled Study; The Patients In This Study Were Randomly Assigned Into Two Groups, 22 Patients In Each Group (using Random Allocation Sequence That Was Done In The Center Of Evidence-based Dentistry ? Cairo University) GROUP A: Will Receive Ca(OH)2 Dressing And GROUP B: Will Receive Pulpotec Dressing. All Selected Patients Were Subjected To Pulpotomy. The Primary Outcome Was The Degree Of Pain Relieving After The Procedure By 8, 12, 24, 48 Hrs And Was Measured Using The Visual Analogue Scale (VAS). Secondary Outcome Was Following Up Pain Using The (VAS) After 1, 3 And 6 Mos. And To Evaluate Procedure Effect Both Clinically And Radiographically.

Results: The Outcome Of This Study Showed That Using Ca(OH)2 And Pulpotec As Intracoronal Dressing Materials Resulted In Clinically Significant Reduction In Post Endodontic Pain At All Post-operative Follow-up Periods (8,12,24) Hrs, While Significant Reduction Of Pain For Pulpotec At The 48 Hrs Of The Post-operative Follow-up Period. After 8 Hrs,�Group B Showed Statistically Significantly Higher Prevalence Of No Pain And Mild Pain. Group A Showed Higher Prevalence Of Moderate Pain.�After 12 Hrs And 24 Hrs,�Group B Showed Statistically Significantly Higher Prevalence Of No Pain. Group A Showed Higher Prevalence Of Mild Pain. After�48�hours,�there Was No Statistically Significant Difference Between The Two Groups. After 1 Mo,�Group B Showed Statistically Significantly Higher Prevalence Of�no Pain. Group A Showed Higher Prevalence Of�severe�pain. All Cases In Group A Needed Root Canal Treatment After 3 And 6 Mos In Comparison To One Case In Group B That Needed Root Canal Treatment After 6 Mos Due To Persistence Of Pain On Percussion. Conclusion: Although Ca(OH)2 Succeeded In Relieving Pain Of Acute Pulpitis With Apical Periodontitis Within 48 Hours From Its Initial Insertion In Pulp Chamber; However, It Failed To Relief Pain Over Long Period Of Time And Failed To Improve The Periodontal Condition. While High Levels Of Effectiveness Of Pulpotec, For Sealing The Pulp Stumps Of Teeth Treated For Pulpitis By The Vital Pulpotomy Method And In Relieving Acute Pain In Apical Periodontitis.