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تاثير الاجهاد لبيئة طب الاسنان على صحة الفم والاسنان وخصائص اللعاب الفزيو - كيميائية بين طلبة طب الاسنان == The Impact of Dental Environment Stress on the Oral Health Status and Salivary Physicochemical Characteristics among Dental Students

Author name: رغد ابراهيم كاظم
Supervisor name: الحان احمد قاسم
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

العلاقة بين كثافة العظام المقدرة بالتصوير المقطعي المحوسب ذات الحزمة المخروطية والثبات الاساسي لزرع الاسنان باستخدام مقياس استقرار الغرسة IST == Relationship between the Bone Density estimated by cone-beam computed tomography and the primary stability of dental implants by using implant stability meter IST®.

Author name: مصطفى فيصل الجمال
Supervisor name: حسنين احمد الجميلي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

تقييم الخوف من طبيب الاسنان عند الاطفال في عيادة طب الاسنان الملونة مقارنة بعيادة طب الاسنان التقليدية == Evaluation of Children’s Dental Anxiety in Colorful Versus Conventional Dental Clinic

Author name: رشا خلف زغير
Supervisor name: زينب جمعة جعفر
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad - Faculty Of Dentistry - Department of Oral and Dental Surgery
Language: English
University location: Baghdad

تقييم ثبات الغرسة ومستوى العظم الهامشي لزرع الاسنان الموضع على الفور في مغرز الاسنان العلوية المقلوعة معززة بنوعين مختلفين من التطعيم العظمي : دراسة سريرية مقارنة == Evaluation of Implant Stability and Marginal Bone Level of Maxillary Immediate Implants Augmented with Two Different Bone Grafting Materials. (A Clinical Comparative Study

Author name: حسام اياد النعيمي
Supervisor name: ثائر عبد اللطيف حسن
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad
First pages:

فاعلية الاستخدام الموضعي لخليط السمفاستاتين مع رغوة الجلاتين على كثافة العظم المتكون في محاجر الاضراب السفلى الاخيرة المقلوعة جراحيا : دراسة مقارنة سريرية == Efficacy of Local Application of Simvastatin and Gel foam Combination on Bone Density, in the Sockets of Surgically Removed Mandibular third Molars (A Prospective Comparative Clinical Study

Author name: حيدر صالح مهدي
Supervisor name: سحر شاكر العادلي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad
First pages:

فعالية الضغط الهيدروليكي لرفع الجيوب الفكية مقارنة مع الاوستيوتوم من خلال الطريقة القشرية باستخدام المنظار : دراسة عشوائية سريرية == The Efficacy of Hydraulic Pressure Sinus Lift Versus Osteotome Lift Via Crestal Approach Utilizing Sinus Endoscopy (A Randomized Clinical Study)

Author name: اسيل حامد مدب
Supervisor name: ثائر عبد اللطيف حسن
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

تاثير العلاج الغير الجراحي لما حول الاسنان على مستوى عامل نخر الورم الفا Cross-linked N-telopeptide و من النوع الاول من الكولاجين في مصل المرضى المصابين بداء السكري من النوع الثاني مع التهاب ما حول الاسنان المزمن == Effects of Nonsurgical Periodontal Treatment on Serum Level of Tumor Necrosis Factor-Alpha and Cross-linked N-telopeptide of Type I Collagen in Type 2 Diabetic Patients with Chronic Periodontitis

Author name: وائل عبد العزيز كزار
Supervisor name: مها شكري محمود
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

دراسة مقارنة في تقييم ذوبان العظم السنخي حول زرعات الاسنان الموضعة بطريقة الجراحة السديلة واللاسديلة اعتمادا على التصوير الشعاعي المقطعي المخروطي : دراسة سريرية وشعاعية == Evaluation of Crestal Bone Resorption around Dental Implants Placed with Flapped and Flapless Surgical Techniques Using Cone Beam Computed Tomography (Clinical and Radiological Comparative Study)

Author name: مصطفى عبد الحسين عبد الواحد
Supervisor name: سحر شاكر العادلي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

مقارنة كفائة هلام الاوزون والكلور هكسيدين كعلاج موضعي مساعد في التهاب اللثة الناجم عن تراكم اللويحات البكتيرية : دراسة سريرية ومناعية

Author name: مها زهير احمد
Supervisor name: ايسر نجاح محمد
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

تاثير الحالة الصحية للثة مع المدورات الخلوية اللعابية واللبنيه المرافقه للالتهاب على نمو الرضيع وترابط الام والرضيع فيما يتعلق بتكوين الجسم للام المرضعة في فترة ما بعد الولادة == The Impact of Periodontal Health Status with Salivary and Milk Pro-Inflammatory Cytokines on Infant’s Growth and Mother-Infant Bonding Related to Body Composition of Lactating Mother in Postpartum Period

Author name: لقاء صباح حسن
Supervisor name: بان صاحب ذياب
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Doctorate
University: University of Baghdad
Language: English
University location: Baghdad

تقييم تاثير الليفين الغني بالصفيحات الدموية على الكثافة العظمية المتكونة في عظم السنخ بعد عملية القلع بواسطة التصوير الشعاعي المقطعي المخروطي == Evaluation of platelet Rich Fibrin Effect on the Bone Density after Teeth Extraction by Cone Beam Computed Tomography

Author name: كمال صاحب مزعل
Supervisor name: سحر شاكر العادلي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

تقييم تعدد اشكال النوكليوتيدات احادية الجينات لمستقبلات فيتامين د وعلاقتها بـ Porphyromonas gingivalis في مرضى النساغ المزمن الشديد == Evaluation of Single Nucleotide Polymorphisms of Vitamin D Receptor Gene and their Association with Porphyromonas gingivalis in Patients with Severe Chronic Periodontitis

Author name: غسق عاصم عبد الوهاب
Supervisor name: بان فاضل الدروبي | بتول حسن هاشم الغرابي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Doctorate
University: University of Baghdad
Language: English
University location: Baghdad

تقييم ثبات الغرسة ومستوى العظم الهامشي لزرع الاسنان الموضع على الفور في مغرز السن المقلوع معززة بفوسفات بيتا ترايكلسيوم خالص الطور == Evaluation of Implant Stability and Marginal Bone Level of Immediately Placed Dental Implants in Fresh Extraction Sockets Augmented With Phase- Pure Beta-Tricalcium Phosphate

Author name: علي غيث احمد
Supervisor name: ثائر عبد اللطيف حسن
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

تقييم فعالية استعمال الفايبرين الغني بالصفيحات الدموية كمادة وحيدة للطعم والغشاء في ترقيع عيوب العظم المصاحبة لعملية زراعة الاسنان == Evaluation of the Effectiveness of Using Platelet Rich Fibrin (PRF) as a Sole Grafting Material and Membrane in Augmentation of Dehiscence and Fenestration Defects Encountered during Dental Implant Surgery

Author name: احمد مكي عباس حسين
Supervisor name: سلوان يوسف بدي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

تقييم عملية الشفاء للتجويف العظمي القريب من ذروة السن الممتلئ بالفايبرين الغني بالصفيحات الدموية باستخدام التصوير الشعاعي المقطعي المخروطي : دراسة سريرية مقارنة == Evaluation the Healing Process of Periapical Defect Filled by Platelet‑rich fibrin Using Cone Beam CT scan : Comparative Clinical Study)

Author name: احمد مهدي صاحب
Supervisor name: سحر شاكر العادلي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad

كسور محجر العين في مرضى اصابات الراس : دراسة سريرية لمدة سنة واحدة == Orbital Fractures in Gead injured Patient : on Year Clinical Study

Author name: نبراس حمدان البيضاني
Supervisor name: شكر ارسلان | رافد الصفار
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad
First pages:

العوامل المؤثرة على زراعة الاسنان : دراسة حاضرة ودراسة استعادية == Factors Affecting Endosseuos Dental Implant (Root form) Prospective and Retrospective study

Author name: جبار جاسم كريم
Supervisor name: خالد يوسف كزير
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad
First pages:

الظهور النسيجي الكيميائي المناعي للمعلمات المناعية MMP - 9, TIMP - 1, CD105, Ki - 67, erbB3, NFKB, Calponin and NGF في السرطان الغدي المتعدد الاشكال ذو الدرجة الواطئة والسرطان الكيسي الغدي للغدد اللعابية == Immunohistochemical Expression Of Matrix Metalloproteinase - 9, Tumor Inhibitor Matrix Metalloproteinase - 1, CD105, Ki - 67, ErbB3 Binding Protein - 1, Nuclear Factor Kappa Beta, Calponin And Nerve Growth Factor Proteins In Polymorphous Low Grade Adenoca

Author name: محمد احسان عبد
Supervisor name: لحاظ محمد العزاوي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Doctorate
University: University of Baghdad
Language: English
University location: Baghdad
First pages:

انسلاخ المبيضات اللعابي المقاس بواسطة تفاعل البوليميراز المتسلسل الكمي اللحظي كاداة تنبؤ لحصول التهاب المبيضات الفموي عند مرضى الربو المتعاطين لدواء بيكلوميتازون المستنشق == Salivary Candidal Shed Measured By Real Time Quantitative Polymerase Chain Reaction As A Predictor of Oral Candidiasis In Asthmatic Patients On Inhaled Beclomethasone Dp Therapy

Author name: نغم قطران رحيم
Supervisor name: رعد محي الدين حلمي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: الربو القصبي المزمن يمثل مشكله صحيه جديه في كل العالم وهو عادة يبدا في عمر الطفوله ويبقى المريض في كثير من الاحيان يتعاطى العلاجات المستنشقه مدى الحياة.انتشار الربو القصبي يزداد في كثير من دول العالم مما يجعله احد الامراض المعيقه والمهدده للحياة باعتبا | Asthma is a serious global health problem that usually starts in childhood and continues along patient’s life and most of them have to take inhaled therapy lifelong. The prevalence of asthma is rising in many countries of the world, making asthma one of the most disabling and life threatening diseases effecting patients with different age groups and social classes with variable clinical spectrums and outcomes starting from mild to severe disabling syndrome rendering nonproductive individuals to severe life threatening and sometimes fatal disease. Those patients continue inhaled steroid therapy for long duration, considered by GINA as first line treatment , however such a treatment is associated with local adverse effects on oral tissues, and one of the main concerns is the development of oral candidiasis, a chronic, potentially invasive, infection of oral tissues with fungus candida species resulting in failure of treatment. The scientific interests about such a serious complication have been raised over the past years and debates continued as the candida is considered one of the normal flora of the oral cavity in most of healthy population, however oral candidiasis in pathogenic forms still occur in immunocompromised patients including asthmatics on inhaled corticosteroid therapy.Aim of the study1. To investigate the effect of inhaled corticosteroid therapy in form of Beclomethasone Dipropionate250 microgram/dose CFC free in asthmatic patients on salivary candidal shed estimating by Real Time quantitative Polymerase Chain Reaction (RT qPCR) applied on direct unstimulated saliva samples.2. Evaluation of this shed as prediction of occurrence of oral candidiasis. Patients, Materials and MethodsThis study was conducted at Al Zahraa consultational Asthma and Allergy center - Baghdad Al Karkh Health Directorate from September 2013 to February 2014.The included patients were divided into 3 groups. Group A included asthmatic patients on inhaled Beclomethasone therapy, group B included asthmatic patients that never used any form of inhaled steroid therapy and group C was those asthmatic patients on inhaled Beclomethasone therapy who developed oral candidiasis. All patients were receiving two daily doses. The same exclusion forma was applied to choose Group D who were control healthy individuals. Each included patients and control cases were instructed to give saliva samples in the standard way and samples taken for estimation of candidal count by real time quantitative Polymerase Chain Reaction.Results During the study period, 698 patients were examined, however only 63 patients were included in the study. Those 63 were classified as follows : 28 patients were found on group, 28 were found on group B and only 7 patients were found on group C and 20 cases were selected in group D as a control.Group C patients were having the highest salivary candidal shed (mean=58.7x106 cn/ml) and longest duration of asthma (Mean=2718 days) and longest duration of Beclomethasone therapy (Mean=2224 days) and this was significantly higher than other groups (p<0.05).Group A patients were having the second highest rank after group C in regard of salivary candidal shed and both duration of asthma and Beclomethasone therapy. Inside each group, duration of asthma and duration of Beclomethasone therapy were associated with moderate positive correlation with salivary candidal shed (R>0.5).Age difference between groups were insignificant and age factor had no correlation with salivary candidal shed inside the groups.Discussion : Salivary candidal shed over the groups was directly related to the duration of inhaled Beclomethasone therapy and duration of asthma. They are significantly higher (p<0.01) as we go further from each group to the next, both appear as the reason behind increased candidal shed in groups A and C.The salivary candidal shed curve will gave us a very useful tool for follow up those patients on inhaled steroid therapy ,In addition , predict the risk of developing oral candidiasis and when to interfere prior to the establishment of Oral Candidiasis state as that we have noticed in the group C, in which it was recommended to stop inhaled steroid therapy and the patients would lose the benefits of the therapy.Conclusions1. Resting saliva samples with realtime quantitative PCR was a rapid and accurate tool in diagnosis of oral candidiasis.2. Salivary Candidal Shed could be used as a tool in predicting oral candidiasis in asthmatic patients on inhaled Beclomethasone therapy.3.Longer duration of asthma and longer duration of Beclomethasone therapy were associated with increased salivary candidal shed and established oral candidiasis have the highest amount of shed.4. Candida albicans are present in the oral cavity of any individual of our population

تقيم التسريب الجزني لمركبات الراتنج للحشوات الخلفية سونك فل مركب مستند على السيلورين ومركب نانوفل مستند على الميتاكرليت في : دراسة مقارنة == Microleakage Evaluation of Sonicfill

Author name: مهند احمد الحداد
Supervisor name: حكمت عبد الرحيم الغراوي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: Resin composites have improved greatly since their introduction and are now the materials of choice for most of the restorations. This study was conducted with aim of comparing in vitro the marginal adaptation of three different, low shrink, direct posterior composites Sonic fill™ (nanohybrid composite), Filtek™ P90 (Silorane - based composite) and Filtek™ Z350 (nanofill composite) of a standardized Class V cavity after thermoal cycling. Sixty sound, freshly extracted human premolars were prepared with standardized Class V cavities. The specimens were divided into three groups of twenty teeth each according to the material used : Group A : The teeth were restored with Sonic fill™ posterior composite unidose capsules, Group B : The teeth were restored with a silorane - based posterior composite (FiltekTM P90), Group C : The teeth were restored with nanofill methacrylate - based composite (Filtek™ Z350 XT).After specimens were stored in distilled water at 37°C for 7 days, all specimens were subjected to thermocycling at (5° to 55 °C), then immersed in 2% methylene blue dye for 24 hours. For each group microleakage at the occlusal and gingival regions was estimated by determining dye penetration using scoring system under steromicroscope (10X). The statistical analysis of the results showed that, Filtek™ P90 silorane based composite exhibited the lowest mean of microleakage, with statistically highly significant difference (P < 0.01) when compared with Sonicfill™ composite and Filtek™ Z350 XT nanofill composite. On the other hand, the results of this study showed that Sonic fill™ composite exhibited no significant difference (P > 0.05) as compared with Filtek™ Z350 XT nanofill composite. Also, the results in this study showed that there is a highly significant difference (P < 0.01) in dye penetration between occlusal and gingival regions for each group

تقييم اصابة المفصل الفكي الصدغي عند مرضى الصدفية باستعمال التصوير المقطعي المحوسب للكشف عن التغيرات المفصلية == Evaluation of The Involvement of The Tempromandibular Joint In Patients With Psoriasis Using Computed Tomography For Detection of Psoriatic Arthritis Changes

Author name: منتهى فوزي صالح
Supervisor name: هاجر ابراهيم عبد الله
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: اضطرابات المفصل الفكي الصدغي تشير الى مصطلح مركب يحتوي على عدة حالات تتضمن المفصل الصدغي,التركيبات المحيطة او كلاهما.اضطرابات المفصل الفكي الصدغي هي مجموعة اعراض معقدة اكثر من كونها حالة معينة واحدة, ويعتقد انها تنتج من عدة عوامل مثل : العوامل الجينية, ال | Tempromandibular disorders is a collective term, embracing several clinical problems involving the muscles of mastication, temporomandibular joint (TMJ), or both.Tempromandibular disorders is a symptom complex rather than a single condition, and it is thought to be caused by multiple factors like : genetic, developmental and metabolic.TMDs form a cluster of related disorders with common symptoms which include localized pain, limited or asymmetric movement, and clicks or grating on opening.Psoriatic arthritis is a chronic inflammatory arthropathy that affects patients with psoriasis. Psoriatic arthritis is most commonly a seronegative oligoarthritis found in patients with psoriasis and therefore occurs more commonly in patients with tissue type HLA - B27. The clinical findings for Tempromandibular Psoriatic arthritis are pain, tenderness, limitation of movement , joint stiffness, clicking as the jaw is opened or closed, difficulty in opening the mouth, locking of the jaw,and crepitations. These findings are essentially the same as for Tempromandibular disorders.• Objective of the study : • To determine the extent of tempromandibular joint involvement in patients with psoriatic arthritis.• To correlate between clinical findings and radiographic finding.Materials and method : In this study 98 patients were selected ,50 male and 48 female, their age ranged between(18 - 68)years. They were collected at Al - yarmook teaching hospital/department of dermatology during the period from ( NOV 2014 - May 2015).They were diagnosed as having psoriatic arthritis by a dermatologist according to (Moll and Wright diagnostic criteria 1973).These patients were sent to rheumatoid factor test RF to exclude the presence of rheumatoid arthritic disease, then the patients were exposed to CT scanning for the Tempromandibular joint in Al - Yarmook teaching hospital for screening the involvement of TMJ with psoriatic arthritis by the presence of any radiographic changes such as erosion, flattening,osteophyte and sclerosis in the condylar head.Results : The result of the study showed that the mean age of psoriatic arthritic patients in TMJ was (44.2) years, and the female percentage was (48.4%) and the male was (51.6%). Psoriatic arthritis in TMJ showed high significance in the unilateral side symptoms (100%) it was significant in patients with positive family history (54.8%), and non significant in the right/left ratio (41.9%). Oligo type was found in twenty six patients (83.9%) with significant p - value. Clinically, all symptoms including clicking, tenderness and tempromadibular joint pain were highly significant, limitation showed (54.8%), TMJ pain showed (64.5%) and tenderness showed (54.8%).Radiologically : CT scan showed sensitivity for erosion in TMJ (54.8%), for osteophyte (32.3%), for condylar flattening (16.1%) and for sclerosis (9.7%) while specificity for all were (100%). Association between clinical symptoms and radiological changes showed non significant correlation. Conclusions : Psoriatic arthritis of TMJ has been found oftenly unilateral (oligo type). Female/ male ratio is about 1 : 1. nearly 50% of patients were having limitation in mouth opening. Most of the patients were having positive family history.The development of psoriatic arthritis in TMJ is related to the duration of the disease. Plaque psoriasis is the most associated type with the psoriatic arthritis in TMJ. Most of patients with psoriatic arthritis show psoriatic nail changes. The most radiographic findings found in patients with psoritic arthritis was erosion in the condylar head. There is association between clinical and radiologic findings for psoriatic arthritis in TMJ.

ضبط الحواف ومقاومة الكسر لاغلفة ال Ceramill Sintron المعدنية المصممة والمصنعة بالحاسوب مكسوة بثلاث انواع مختلفة من الخزف == Marginal Discrepancy And Fracture Resistance of CAD\CAM Ceramill Sintron Metal Copings With Different Porcelain Materials

Author name: مصطفى نبيل عبد الغني
Supervisor name: عمار عطا الله علي السعدي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: دقة الحواف والقوة، لاي ترميم معوض للاسنان هي صفة مهمة. ويمكن اعتبارعدم تطابق للحواف او قلة القوة سبب مهم يؤدي الى فشل التعويضات الاصطناعية للاسنان.لذلك تم اجراء هذا البحث لغرض تقييم اختلاف ظبط حافات ومقاومة الكسر لتيجان السيراميك المصنعة من اغلفة الC | Marginal fit and strength are important criteria for any restoration; poor marginal fit and low strength may be considered as a source of prosthesis failure. This study was performed to compare the marginal fit changes and facture resistance of metal ceramic crowns constructed from Ceramill Sintron metal coping veneered with three different porcelain veneering materials (Vita Master Koromikos VMK, Willi Geller Creation CC and GC initial MC). Also evaluating the influence of thermocycling on load at fracture value. The method included the use of master brass die which was milled to represent the prepared maxillary central incisor. Sixty metal copings were milled directly using Ceramill Sintron blank, then divided randomly into three groups. Each group consist of twenty metal copings, then veneered with porcelain : VITA for group A, Creation for group B and GC for group C. The marginal gap was measured before and after porcelain veneering for each group using travelling light microscope, then marginal fit changes was calculated. Fracture resistance test was done by Instron®, the master die was duplicated to sixty analogs then each analog was fixed into acrylic base. After that each crown was cemented onto the corresponding die analog using zinc phosphate cement. Ten samples of each group were subjected to compressive loading to fracture and other ten subjected to thermocycling followed by compressive loading to fracture.The result showed that GC group was highly significant different from other tested groups in marginal fit changes, whereas there was no significant different between VITA and Creation group. While there was significant difference among tested group at (P < 0.01) in fracture resistance, and the effect of thermocycling process did not significantly reduce the load at fracture for all groups.This study concluded that GC group present the least marginal fit changes, while the fracture resistance was highest for VITA group follow by Creation then GC. Thermocycling reduce load at fracture but not significantly.

A Comparative Study To Evaluate Canal Transportation And Centering Ratio At Different Levels of Simulated Curved Canals Prepared By Irace, Protaper NEXT And Protaper Universal Files == A Comparative Study To Evaluate Canal Transportation And Centering Ratio At Different Levels of Simulated Curved Canals Prepared By Irace, Protaper NEXT And Protaper Universal Files

Author name: محمد علي فاضل
Supervisor name: Hikmet A. Sh. Al | Gharrawi
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: تحضير قناة الجذر يشمل كلا من تشكيل وتوسيع المساحة اللبية بالاضافة الى تطهيرها من الجراثيم، من دون اي خطا اجرائي هو من اقصى درجات التفضيل. حديثا، في مجال تطبيقات حشوات الجذور، ادوات النيكل تيتانيوم اصبحت تستخدم بصورة شائعة لتنظيف وتشكيل قناة الجذر. ادوات ا | Root canal preparation includes both shaping and enlargement of the endodontic space in conjunction with its disinfection, without any procedural error is of the utmost preference. Recently, in endodontic practice, the nickel - titanium instruments are used commonly for the preparation of the root canal space. Nickel - titanium instruments are much more flexible than stainless steel files and have superior cutting efficiency. Super - elasticity of nickel - titanium rotary instruments allows the clinicians to produce the desirable tapered root canal form with a reduced tendency to canal transportation and instrument fracture. The target of this study was to measure and compare the canal transportation and centering ability of iRaCe and ProTaper NEXT nickel titanium instruments with ProTaper Universal instruments in simulated curved canals at different levels and compare canal transportation and centering ability among different levels for each tested instrument.Sixty simulated curved canals of 40°curvature were randomly divided into three groups of twenty canals each; the first group (group A) was prepared with iRaCe instruments, the second group (group B) was prepared with ProTaper NEXT instruments and the third group (group C) was prepared with ProTaper Universal instruments. The canals were prepared to an apical size 30 by crown - down instrumentation technique. Removal of material was measured at five different levels : at the canal orifice (O), half way to the orifice in the straight sections (HO); the beginning of the curve (BC); the crest of the curve (AC); the end point (EP). Pre - and post - operative photos of the simulated canals were taken in a standardized technique at magnification of 40X. An assessment of canals shape has been determined using Photoshop CC 2014 and AutoCAD 2014 software program. The data of canal transportation as well as centering ratio were analyzed statistically using Shapiro - Wilk, ANOVA and LSD tests.Within the limitation of this study, it is shown that canals preparation with the three designs of NiTi instruments produced canal transportation. However, the iRaCe instruments showed a significantly less canal transportation and a significantly better centering ability than both ProTaper NEXT and ProTaper Universal instruments at all levels of measurements, followed by ProTaper NEXT instruments that showed a significantly less canal transportation and significantly better centering ability at all levels when compared with ProTaper Universal, while the ProTaper Universal instruments showed the highest values of canal transportation and the worst ability to stay centered in the canals at all levels. Considering the direction of canal transportation, the iRaCe instruments showed minimal transportation towards inner aspect of canal at coronal and at the apex of curve and towards outer aspect of canal at middle, beginning of curve and at the end point of the preparation, while ProTaper NEXT instruments were showed transportation usually towards the inner aspect of the canal at middle part of the canal and towards the outer aspect at coronal, beginning of curve, apex of curve and at the endpoint of the preparation, while ProTaper Universal files were usually towards the inner aspect at middle part of the canal and towards the outer aspect at coronal, beginning of curve, apex of curve and at the endpoint of the preparation.

الانتشار والعلاقة بين اضطرابات المفصل الصدغي بين طلاب طب الاسنان على اساس معايير التشخيص والاجهاد والاضطرابات الفموية == Prevalence And Correlations Between Temporomandibular Disorders In Dental Students Based On Diagnostic Criteria (DC/TMD) , Parafunctions And Psychoemotional Stress

Author name: علا علي خلف
Supervisor name: هاجر ابراهيم عبد الله
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: اضطرابات المفصل الصدغي والاضطرابات الفموية يبدو انها مشكلة متكررة في المجتمعات الحديثة. ويرتبط الباثولوجيا السببية المفصل الصدغي الى العضلات، واقواس الاسنان، ودواعم الاسنان. وتشمل الاسباب الرئيسية على حد سواء العوامل الفيزيولوجية المرضية والنفسية وا | Bagkground : The temporomandibular disorders (TMD) and oral parafunctions seem to be a frequent problem in modern societies. The etiopathology of the temporomandibular joints is related to muscles, teeth arches, and periodontium. Their main causes involve both pathophysiological and psychosocial factors. In the literature, a significant impact of the psychoemotional factor is reported, comparable to the impact of other factors concerning physical health such as systemic diseases, malocclusions, loss of teeth, and traumas. Stress, fatigue, anxiety, depression, sleep disorders, and a fast pace of life affect negatively the human psyche.Aim of study : The aim of the study was to assess the prevalence of temporomandibular disorders (TMD) and oral parafunctions, as well as their correlation with psychoemotional factors among dental students by using diagnostic criteria (DC/TMD).Subjects, materials and methods : the sample’s size of 407 students (169 males and 238 females) of dental college (100 fifth stage , 102 fourth stage ,99 third stage and 106 second stage ). Firstly students subjected for stress questionnaire (perceived stress scale - 10) , secondly they subjected to different clinical and questionnaire measures according to diagnostic criteria of temporomandibular disorders DC/TMD (axis1) which have standerized series of diagnostic tests based on clinical signs and symptoms , finally the dental students subjected for oral parafunctions questionnaire using oral behavior checklist.Results : the results obtained from this study showed that the prevalence of TMDs was significantly greater among students with oral parafunctions. We also observed that the prevalence of TMDs according to DC/TMD was higher among students with headache.In this study, the prevalence of psycho - emotional stress , TMD according to DC/TMD and oral parafunctions were higher in females than males and in fifth stage greater than other stages.Conclusion : • the prevalence of TMDs according to DC/TMD were significantly higher among females than males.• Oral parafunctions ( bruxism , cheek/lips biting , objects biting and nail biting ) showed greater prevalence in fifth stages than others and higher in females than males • In all stages females showed greater prevalence of psycho - emotional stress than males and among students of fifth stage the prevalence of psycho - emotional stress was higher than other stages.

فشل القشور الخزفية المصنوعه من السيراميك باستخدام تقنيات اللصق المختلفة : دراسة مقارنة مختبرية == Failures of Porcelain Laminate Veneers Using Different Techniques of Bonding (A Comparative In Vitro Study)

Author name: صفا عدنان كعيد
Supervisor name: عمار عطا الله علي السعدي
General topic: Dentistry
Specific topic: Oral and Maxillofacial Surgery
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: Esthetic dentistry as a concept and adhesive materials development as a functional element make the new dawn of dentistry especially with the continuous development of adhesive techniques. This study is to evaluate the failure patterns of porcelain laminate veneers used to esthetically restore maxillary first premolar by bonding them to enamel and dentin with two different techniques.Forty eight extracted human maxillary first premolar were used for this study. Teeth were divided randomly into one control group and three experimental groups of twelve teeth eachGroup (A) were prepared in enamel (0.5 mm) depth of preparation. Group (B) were prepared in dentin (1 mm) depth of preparation and their veneers were bonded by DDS technique. Group (C) were prepared in dentin (1 mm) depth of preparation and their veneers were bonded by IDS technique. Standard preparation for each tooth in the experimental groups with ceramic veneer set burs especially designed for laminate veneer preparation. All the experimental groups were restored with the same type of veneer which was lithium disilicate ceramic CAD/CAM blocks (IPS e. max CAD, ivoclar vivadent) and were milled by CAD/CAM technology (CEREC inLab 4.02 milling system, Sirona).For all the experimental groups, Choice™2 veneer cement (Bisco, USA) was used for the luting of veneers. After cementation, teeth were stored in distilled water in 37°C for one week. The specimens were loaded to failure using instron universal testing machine. Specimens in experimental groups were examined by stereomicroscope at magnification of 20x to evaluate the mode of failure.Results were statistically analyzed and showed that the highest mean of failure load was recorded for the control group (548.1 N ± 93.2), for group (A) the mean of failure load was (393.4 N ± 84.2), and for Group (B) had the mean of failureAbstract IIIload was (237.8 N ± 91.6), and for group (C) the mean of failure load was (318 N ± 82.2).The one way ANOVA test was carried out and showed that there is a statistically high significant difference among the groups.Then the LSD test have shown that there is a statistically high significant difference between the control group and all three of the experimental groups, and there was a statistical high significant difference between group (A) and group (B), while group (C) have shown that there is a statistical significant difference with groups (A) and (B).The mode of failure varied from only debonding in groups (B and C) to deboning and fracture in group A.In conclusion, this study found that although enamel is still the most favorable tooth substrate for indirect adhesive restorations, the development of bonding techniques like IDS made dentin as acceptable tooth substrate for indirect adhesive restorations when it's unavoidable.
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