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نتائج البحث: 25 من أصل 669

ترميز القناة المرتكز على الاشارات الفوضوية == Chaos Based Channel Coding

اسم المؤلف: سراب كمال محمود
اسم المشرف: حكمت نجم عبد الله
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:

تقييم اداء نظام الاتصالات المتعدد المستخدمين المرتكز على متجهات فوضوية متعامدة == Performance Evaluation Of Multiuser Communication System Based On Orthogonal Chaotic Vectors

اسم المؤلف: بسمة نزار ناظم
اسم المشرف: ماهر خضير محمود
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: In DS - CDMA systems, the use of orthogonal spreading codes with low cross - correlation values is needed to suppress the effect of multiple access interference (MAI) which increases as the number of active users in system is increased.Currently, the conventional PN sequences, such as (Gold codes, Kasami codes …etc.), generated by linear feedback shift registers (LFSRs) and orthogonal variable spreading factor (OVSF) were used as spreading codes in DS - CDMA system. Using these sequences, it is not possible to increase the number of active users in the system due to the fact that the possible sequences generated in conventional PN - system are limited in number and offer mutual interference as the number of active users is increased due to its non - zero cross - correlation values. The chaotic system can be used to generate very large number of quasi - orthogonal sequences compared with the number of PN sequences due to its sensitivity to initial conditions. Another type of chaotic sequences with zero values of cross - correlation called Orthogonal Chaotic Vectors (OCVs) is generated using chaotic systems and the basic idea of Gram - Schmidt ortho - normalization process.In this work, the use of OCVs in synchronous DS - CDMA system for transmission of data over (AWGN, Flat fading and Frequency selective channels) is introduced. The simulation results show that the DS - CDMA based on OCVs gives better BER performance when spread factor ? is greater than the number of active users due to the reduction of MAI between active users.Results show also that, at BER = - in AWGN channel and for 5 users, there are gain of (0.3, 1.2, 1.75 and 3.75) dB between system based on OCVs and systems based on small set Kasami sequence, Gold codes, large set of Kasami sequence and Non - OCVs respectively. Under the effect of flat fading channel, it can be noted that at BER = - and for 30 user, there is 1.7 dB gain between system based on OCVs and system based on small set of Kasami sequences, and this gain increases to 2 dB for 50 user.Under time invariant frequency selective fading channel and for 8 users at BER= - there is about 6dB gain between the system based on OCVs and system based on Non - OCVs.

حول المجموعة الضبابية المفتوحة في الفضاءات التبولوجية الضبابية == on Fuzzy ? - Open Set In Fuzzy Topological Spaces

اسم المؤلف: غزوان حيدر عبد الحسين
اسم المشرف: منير عبد الخالق عزيز الخفاجي
الموضوع العام: علوم الرياضيات
السنة: 2014
الموضوع الدقيق: التبولوجيا
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تحقق هذه الرسالة اربعة اهدافالهدف الاول هو دراسة بعض انواع المجاميع الضبابية المفتوحة تدعى (المجموعة الضبابية - ?, المجموعة الضبابية المنتظمة, المجموعة الضبابية - ?, المجموعة الضبابية - ?, المجموعة الضبابية ? ) مع بعض المبرهنات وبعض العلاقات فيما بينها ف | The first objective is to study some types of fuzzy open sets namely (fuzzy ? - open set, fuzzy regular open set, fuzzy ? - open set, fuzzy ? - open set and fuzzy ? - open set) with some theorems on them and some relations between them in fuzzy topologica

دراسة اطياف الامتصاص لبعض الجزيئات اللاعضوية في مناطق اطياف الاشعة فوق البنفسجية والمرئية وتحت الحمراء == Study The Absorption Spectra of Some Inorganic Molecules In UV - VIS - IR Rang of Spectrum

اسم المؤلف: مريم سمير عبد الستار هاشم
اسم المشرف: خالد حسن عبد المعموري
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The study is dealt with inorganic compound molecules of polyatomic ions belong to different point groups. Through our study we made used the FT - IR to study of the vibrational spectra, and UV - VIS Spectroscopy to study and diagnosis the electronic spec

تطوير مرشحات رقمية لتحسين الصور الطبية == Adaptive Digital Filters For Medical Images Enhancement

اسم المؤلف: فلاح عابر بيده البيضاني
اسم المشرف: زياد محمد عبود
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد الضوضاء المرافقة للصور الطبية من جملة المشاكلات التي تواجه عملية تشخيص الامراض بواسطة هذه الصور، فضلا عن عدم جودة الصور بسبب الاضاءة والتباين المطلوبين، لانها تجعل عملية تفسير الصور الطبية الناتجة وتحليلها عملية صعبة، وتقلل من الفائدة المرجوة منها، ل | The noise accompanying the images medical among the problems faced by the process of diagnosing diseases by these images, as well as the lack of quality images because of the brightness and contrast wanted, they make the process of interpretation and anal

دراسة نظرية لتحديد افضل قدرة مستحصلة في منظومة القدرة التناضحية المفتوحة == Theoretical Study And Optimization of An Open Cycle Osmotic Power Process

اسم المؤلف: مضر صباح حميد
اسم المشرف: عادل عبيد شريف الحسيني | احمد فرحان عطوان
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: A great quantity of renewable energy can be potentially generated when waters of different salinities are mixed together. The harnessing of this energy for conversion into power can be accomplished by means of the Pressure Retarded Osmosis (PRO). This tec

الخصائص الميكانيكية الكهربائية والحرارية لمتراكبات البوليمر - انابيب الكاربون النانوية == Polymer - Carbon Nanotube Composites Mechanical, Electrical And Thermal Properties

اسم المؤلف: فاطمة احمد خلف
اسم المشرف: نجيبة عبد الله حسن الحمداني | طارق سهيل نجم
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعتبر البوليمرات ذات الاساس البوليمري من اهم المتراكبات بسبب قابليتها على الاندماج مع عدد من مختلف المواد. تم التركيز في هذه الدراسة على تطوير ودراسة خصائص متراكبات نانوية متكونة من الراتنج epoxy)) المتصلد حراريا كمادة اساس مضاف اليها الانابيب الكاربوني | Polymer matrix composites (PMCs) are one of the most important composites materials due to their ability to incorporate a number of different materials. This study focuses on development and characterization of thermosetting resin epoxy based nanocomposit

تصنيع وتوصيف خلايا شمسية مرنة == Fabrication And Characterization of Flexible Solar Cells

اسم المؤلف: علي محسن عبد الحسين اللامي
اسم المشرف: زينب عبد السلام الرمضان | فلاح ابراهيم العطار
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد الانظمة الفوتوفولتائية من مصادر الطاقة النظيفة والتي بدات تاخذ مساحة مهمة من البحث، ان الاغلبية من الخلايا الشمسية تتميز بكونها صلبة ولم يراعى فيها عامل المرونة, لذا توفر الانظمة الفوتوفولتائية المرنة عدة ميزات في مجال سهولة النقل, مقاومة الكسر وخفة | As a source of clean, remote energy, photovoltaic (PV) systems are an important area of research. The majority of solar cells are rigid materials with negligible flexibility. Flexible PV systems possess many advantages, such as being transportable, unbrea

تحضير ودراسة اغشية ZnO : Mn ذات التركيب النانوي بتقنية الترسيب البخاري الكيميائي تحت الضغط الجوي الاعتيادي == Preparation And Study of Nanostructure ZnO : Mn By Atmospheric Pressure Chemical Vapor Deposition Technique

اسم المؤلف: هبة راشد شاكر
اسم المشرف: صلاح قدوري هزاع
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تم في هذا البحث تصميم وتصنيع منظومة الترسيب البخاري الكيميائي عند الضغط الجوي الاعتيادي ذات الجدار البارد محليا, وتشغيل المنظومة للحصول على افضل غشاء بواسطة تغيير ظروف التشغيل من حيث درجة حرارة القاعدة, زاوية ميلان القاعدة, موقع القاعدة داخل المنظومة, ك | In this research, atmosphere pressure chemical vapor deposition system, with cold wall has been designed and locally manufactured. This system operated to get the best thin film by changing the conditions of performing such as; substrate temperature, slop

الخواص التركيبية والبصرية لاغشية Fe2O3 - NiO المحضرة بطريقة التحلل الكيميائي الحراري == The Structure & Optical Properties of (Fe2O3 - NiO) Thin Films Prepared By The Chemical Spray Pyrolysis

اسم المؤلف: نورا جاسم محمد جبر
اسم المشرف: نادر فاضل حبوبي
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: حضرت اغشية اوكسيد الحديديك ( Fe2O3 ) واغشية اوكسيد الحديديك الممزوجة باوكسيد النيكل NiO)) من المحاليل المائية لكلوريد الحديد الثلاثي (FeCl?.6H2O) وكلوريد النيكل (NiCl2.6H?O) بنسب مزج (% 10,20,30,40,50) بطريقة التحلل الكيميائي الحراري على قواعد زجاجية بدرج | Ferric Oxide (Fe2O3) and Nickel oxide (NiO) Mixed with Ferric Oxide thin films were prepared from an aqueous solution of [FeCl¬3.6H2O] Nickel chloride [NiCl2.6H?O] in volumetric concentration (10,20,30,40,50%) by chemical spray pyrolysis method onto glass

تصميم مضخة هجينة شمسية - جيوحرارية == Design of Hybrid Solar - Geothermal Heat Pump

اسم المؤلف: علاء حسين شنيشل السوداني
اسم المشرف: احمد فرحان عطوان | نصير كريم قاسم السوداني
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: مصادر الطاقة التقليدية مضرة بيئيا على العكس من مصادر الطاقة المتجددة. سعى العالم سوية في نهاية القرن الماضي الى تشخيص مشاكل تغير المناخ الذي ادى بدوره الى التفكير في سبل حفظ الطاقة والتقليل من الانبعاثات. تعتبر طاقة الجيوحراري (Geothermal energy) من الطاق | Conventional energy resources are environmentally harmful unlike renewable energy resources. At the end of the last century the world came together to address the problems of climate change; which led to the thinking of ways to conserve energy and reduce

الخزن الموسمي للطاقة الشمسية الحرارية : دراسة نظرية == Theoretical Study of Seasonal Storage Thermal Solar Energy

اسم المؤلف: فاضل محمود عليوي
اسم المشرف: احمد فرحان عطوان | نصير كريم قاسم السوداني
الموضوع العام: علوم الفيزياء
السنة: 2014
الموضوع الدقيق: الفيزياء
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يتناول هذا البحث تخزين الطاقة الشمسية الحرارية الفائضة في فصل الصيف ( من ايار الى تشرين الاول) في داخل التربة، للاستخدام لاحقا ( في فصل الشتاء) للحد من استهلاك العالي للطاقة المستخدمة وكذلك لتقليل انبعاث غاز ثاني اوكسيد الكاربون. استخدم نموذج شبه ثلاثي ال | This research deals with storage of the thermal solar energy in the soil in summer season (from May to October) for latter utilization (in winter) for reduce the energy consumption. The quasi - three - dimensional model and finite line source model are us

دراسة مقارنة للتاثير السمي للزنبور الاحمر Vespa Orientalis L والزنبور الاصفر Polistes Olivaceaus (De Geer) (Hymenoptera : Vespidae على تحلل كريات الدم الحمراء والتخثر لدى الانسان == Poison Effects of Red Wasp Vespa Orientalis L. And Yellow Wasp Polistes Olivaceaus (De Geer) (Hymenoptera : Vespidae) On The Decomposition of Red Blood Cells And Coagulation In Humans

اسم المؤلف: شهد فلاح عباس
اسم المشرف: سعدون ابراھیم اسماعیل | محمد عبد الرزاق الصوفي
الموضوع العام: علوم الحياة
السنة: 2014
الموضوع الدقيق: الحيوان - الحشرات
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: To study the impact of toxic of the the Red Wasp Vespa orientalis L. and yellow wasp Polistes olivaceaus (De Geer) from family (Vespidae) the decomposition of red blood cells and clotting in humans. Were collected 508 insect Red wasp was where the number of workes 390 insect the yellow wasp gathered 539 insect where the number of worker 418 insect, and the diagnosis was confirmed based on the taxonomic keys and professors speclalized in the natural history museum and then extracting machine stinging for poisonWasp red and yellow toxin were purified by gel filtration throw Sephacryl S - 200 were obtained on three peaks of proteins, and when estimated the activity of lysis and clotting for peaks separate P1, P2 and P3 for wasp red toxin, the lysis activity of separate P1 was 98% of the poison origin activity and the clotting time was 47.3 minutes, while the lysis activity of separate P2 was 62% of the poison origin activity and the clotting time was 27.53 minutes, and the lysis activity of separate P3 was 29% of the poison origin activity and the clotting time was 13.67 minutes, so P1 separate from Wasp red poison was selected to purification and study the molecular characteristics, while when estimated the activity of lysis and clotting for peaks separate P1, P2 and P3 for wasp yellow toxin, the lysisactivity of separate P2 was 91% of the poison origin activity and the clotting time was 43.8 minutes, while the lysis activity of separate P1 was 49% of the poison origin activity and the clotting time was 19.28 minutes, and the lysis activity of separate P3 was 29% of the poison origin activity and the clotting time was 7.52 minutes, so P2 separate from wasp red poison was selected to purification and study the molecular characteristics The molecular weight of wasp red and yellow toxin the protein cm wasp red toxin P1 was 22387 Da and wasp yellow toxin P2 was 22382 Da using the gel filtration Sephacryl S - 200, while the carbohydrates content were 60.057 and 44.460 mg/ ml for wasp red P1 and yellow P2 toxin respectively as determined by phenol - sulfuric acid method, and type of link between carbohydrates and protein in the separate P1 and P2 investigating by using gel filtration Sephacryl S - 200 and absorbance at 280 and 490 nm.The percentage of iron in wasp red P1 and yellow P2 toxin were 0.88 and 0.44 ppm respectively as determined by atomic absorption, the contain proteins separate P1 and P2 on the iron were investigating by using gel filtration Sephacryl S - 200 and absorbance at 280 and 557 nm. The optimum pH of lysis and clotting activity for wasp red toxin P1 was 6.5, while lysis activity was decrease in pH 4 and 8 to be 38 and 79% respectively from its original activity, and clotting time was decreased from 47.3 min at optimum pH to be 17.9 and 37.3 min at pH 4 and 8, respectively, it was noted that wasp red toxin P1 was constant in the pH range of lysis activity from 6 - 7.5, but it lost 67 and 25% from its original activity at pH 4 and 8 respectively, while the clotting time was constant in the pH range from 6 - 7.5, but it decreased in pH 4 and 8 to be 15.6 and 35.4 minutes respectively The optimum pH of lysis and clotting activity for wasp yellow toxin P2 was 6.5, while lysis activity was decrease in pH 4 and 8 to be 18 and 37% respectively from its original activity, and clotting time was decreased from 48.8 min at optimum pH to be 8.7 and 35.6 min at pH 4 and 8 respectively, it was noted that wasp red toxin P2 was constant in the pH range of lysis activity from 5.5 - 8, but it lost 74 and 19% from its original activity at pH 4 and 8 respectively, while the clotting time was constant in the pH range from 6 - 7.5, but it decreased in pH 4 and 8 to be 12.6 and 39.5 minutes respectively The results for optimum stability temperature of lysis and clotting activity for wasp red toxin P1 refer to increase activity by increasing the action temperature until it reached a maximum at a temperature 35oC, then lysis activity was decreased to be about 4% of its original activity at 80oC, while the clotting time was decrease from 48.8 minutes at the optimum temperature to be 1.8 minutes at 80oC, it was noted that the lysis and clotting activity were stabile at 35oC for 30 min, but it is beginning to decrease with increasing temperature to loses 84% of its original lysis activity at 80oC, and the clotting time was decreased from 47.3 min at 35oCto be 2.3 min at 80oC.The results for optimum stability temperature of lysis and clotting activity for wasp yellow toxin P2 refer to increase activity by increasing the reaction temperature until it reached a maximum at a temperature 35oC, then Lysis activity was decreased to be about 8% of its original activity at 80oC, while the clotting time was decrease from 48.8 minutes at the optimum temperature to be 3.9 minutes at 80oC, it was noted that the lysis and clotting activity were stabile at 35oC for 30 min, but it is beginning todecrease with increasing temperature to loses 98% of its original Lysis activity at 80oC, and the clotting time was decreased from 48.8 min at 35oC to be 5.3 min at 80oC.The results refer to found a relationship between the influence of the wasp type and dose on the red blood cells lysis degree in males and females, it was observed that the concentration had a significant effect (p<0.05) in the red blood cells lysis degree in females, it was 0.401 at concentration 100% for wasp red toxin P1, while it was 0.331 at the same concentrate for wasp yellow toxin P2, the concentration also had a significant effect (p<0.05) in the red blood cells lysis degree in males, it was 1.020 at concentration 100% for wasp red toxin P1, while it 0.842 at the same concentrate for wasp yellow toxin P2, also it refer to found a significant effect (p<0.05) between the effect of the wasp red P1 and yellow P2 toxin and dose on the red blood cells clotting time in females, itwas 46.80 min at concentration 100% for wasp red toxin P1, while it was 46.20 min at the same concentrate for wasp yellow toxin P2, the concentration also had a significant effect (p<0.05) in the red blood cells clotting time in males, it was 47.80 min at concentration 100% for wasp red toxin P1, while it 40.47 min at the same concentrate for wasp yellow toxin P2, there was no significant effects for blood clotting time when making a comparison between the wasp red P1 and yellow P2 toxin for eachconcentration in females and males. The compared between red blood cells clotting time due the wasp red P1 and yellow P2 toxin dose in females and males did not refer to found a significant effect (p<0.05), the clotting time for wasp red P1 was 46.80 and 47.80 min at concentration 100% for females and males respectively, while the clotting time at concentration 6.25% was 17.30 and 17.10 min for females and males respectively, whilst the clotting time red blood cells due wasp yellow P2 toxin in females was 46.20 min and 47.40 min in males at concentration 100%, and it was 17.00 min in females and 17.10 min in males at concentration 6.25%.

دراسة تصنيفية لعويلة الخنافس البرغوثية Alticinaeمن عائلة Chrysomelidae ورتبة غمدية الاجنحة Coleoptera في بعض محافظات العراق == Taxonomic Study On The Flea Beetles (Coleoptera : Chrysomelidae : Alticinae) In Some Provinces of Iraq

اسم المؤلف: رغد عـبيد خضير
اسم المشرف: سعدون ابراهيم اسماعيل
الموضوع العام: علوم الحياة
السنة: 2014
الموضوع الدقيق: علوم الحياة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تناول البحث لهذه الرسالة دراسة تصنيفية لعويلة الخنافس البرغوثية Alticinae في بعض محافظات العراق، علما ان هذه العويلة لم تدرس تصنيفيا في العراق.اختير النموذج Longitarsus ballotae Marsham. لتجسيد صفات العويلة. ولقد درست الاجزاء الرئيسة للجسم وهي الراس والص | The Subject of thesis is a taxonomic study of Subfamily Alticinae in some provinces of Iraq. Knowing that this Subfamily has not been studied taxonomically in Iraq.Was chosen as the model for Longitarsus ballotae Marsham. To embody the gualities of the Subfamily. The detailed study of the head, thorax, abdomen and their appendages was made to evaluate the reliability of the external characters in classifying the species of the Subfamily.There are eight genera and thirteen species for these Subfamily The species are : - Altica deserticola Weise.Aphthona fuentei Reitter.Aphthona sp. Chaetocnema montenegrina Heikertinger.Chaetocnema persica Baly. Epitrix atropae Foudras.Hermaeophaga ruficollis Lucas.Longitarsus ballotae Marsham.Longitarsus membranaceus Foudras.Longitarsus reichei Allard. Longitarsus succineus Foudras.Phyllotreta nemorum Linnaeus.Podagrica fuscicornis Linnaeus.6 Species Register in Iraq are : - Chaetocnema montenegrina Heikertinger.Epitrix atropae Foudras. Longitarsus succineus Foudras.Longitaarsus membranaceus Foudras.Podagrica fuscicornis Linnaeus.Two species Taxonomic keys were designed and developed to is olate the genera of Subfamily Alticinae, sa wellas the genera mentioned and studied in this thesis for each species.

احتمالية حدوث العيوب في عاج الجذر نتيجة لاستخدام انظمة مختلفة من مبارد النيكل تيتانيوم == The Incidence of dentinal root defects caused by different Nickel Titanium instruments

اسم المؤلف: نور الدين علي سعيد
اسم المشرف: ايمان محمد الزقة
الموضوع العام: طب الاسنان
السنة: 2014
الموضوع الدقيق: معالجة الاسنان
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يعد الاعداد الميكانيكي الاحيائي لقنوات الجذر احد الخطوات الرئيسية لتحقيق حشوة جذر ناجحة بسبب امكانية ازالة الاجسام البكتيرية والحطام المتراكم وتسهيل وضع حشوة الجذر داخل القنوات. الغرض من هذه الدراسة هو لملاحظة ومقارنة احتمالية حدوث العيوب في عاج الجذر نتي | Vertical root fracture and crack formation can be seen in root dentin during and after endodontic procedures. Vertical root fracture is one of the most frustrating complications of root canal treatment, which often results in tooth extraction. The aim of this in vitro study was to compare the effect of different Nickel Titanium instruments (ProTaper Universal, EndoSequence, ProTaper Next and RECIPROC) on the dentinal wall in term of dentinal defects.Seventy - five straight palatal roots of freshly extracted human maxillary first molars teeth were used in this study, the palatal roots were sectioned at 11 mm from the apex and wrapped with two layers of aluminum foil, then placed in the center of elastic silicon mold. Fifteen roots were left unprepared to serve as a negative control group, the remaining 60 roots were divided into 4 groups, each group contained 15 roots : • Group I was prepared by rotary ProTaper Universal system.• Group II was prepared by rotary EndoSequence system.• Group III was prepared by rotary ProTaper Next system.• Group IV was prepared by reciprocating RECIPROC system.All canals were prepared to MAF # 40. After each file size of the (rotary files) or after three pecking motion of the (reciprocating files), the file was removed from the canal and the canal was irrigated with 1 ml of 2% of sodium hypochlorite. All files were cleaned periodically to prevent clogging of flutes during instrumentation. The canal remained patent by insertion size 15 K - file.When the instrumentation was completed, the roots were then embedded in a clear acrylic resin blocks and each root was sectioned into three levels : apical, middle and coronal. All samples were examined from coronal direction under Stereomicroscope. The number and the type of dentinal defects were recorded and classified. The collected data was tabulated and subjected to statistical analysis using chi - square test.The EndoSequence group showed the lowest number of dentinal defects followed by ProTaper Next group and then ProTaper Universal group. The highest number of dentinal defects were observed in RECIPROC group. Chi - square test showed that there were highly significant differences among groups (P < 0.01). The results showed a non - significant difference between EndoSequence and Protaper Next group (p > 0.05), and a significant difference with ProTaper Universal group (P < 0.05) and a highly significant difference with RECIPROC group (P < 0.01). The ProTaper Next group showed a significant difference with ProTaper Universal group and a highly significant difference with RECIPROC groups. There was no significant difference between RECIPROC and ProTaper Universal groups.

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

اسم المؤلف: نغم قطران رحيم
اسم المشرف: رعد محي الدين حلمي
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 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

اسم المؤلف: مهند احمد الحداد
اسم المشرف: حكمت عبد الرحيم الغراوي
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 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

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

اسم المؤلف: مصطفى نبيل عبد الغني
اسم المشرف: عمار عطا الله علي السعدي
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 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.

تقييم صحة الفم والبروتينات اللعابية لدى المرضى المصابين بمرض باركنسن == Assessment of The Oral Health And Saliva Proteins In Patients With Parkinsons Disease

اسم المؤلف: صباح فرحان مشتت
اسم المشرف: هاجر ابراهيم عبد الله | مروان صالح النمر
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Background : Parkinson's disease (PD) is a progressive neurodegenerative disorder related to the loss or absence of dopaminergic neurons in the brain. The deficits caused by PD result in slowness of movement, tremor, rigidity, and dysfunction of behavior and these symptoms negatively influence the patient’s capability to carry out the daily oral hygiene manoeuvres.Aims of study : This study aims at using saliva as a biological fluid for assessment in detecting the biomarkers of Parkinson's disease and to assess the impact of this disease on the oral health of patients.Materials and methods : A total number of fourty participants were involved in the study; twenty subjects who appeared healthy (Group I) and twenty Parkinson's patients (Group II). Patients who are eligible for this study were cases of Parkinson's disease treated with anti - Parkinson's medications, both genders and their ages ranged from 40 - 75 years. Specific information related to the demographic characteristics and illness is obtained from each patient. The Brain Bank Diagnostic Criteria for Parkinson’s disease established by United Kingdom Parkinson's Disease Society was used. Each patient was subjected to oral examination during which DMF index was scored, oral health impact Profile OHIP - 14 was used and from each participant the whole unstimulated saliva was collected for biochemical analysis including total salivary protein, direct determination of saliva proteins and determination of ? - synuclein. Results : many oral and clinical signs and symptoms elsewhere in the body were reported in the patient with Parkinson's disease while the clinical features of Parkinson's disease observed in all patients despite of their treatment. Static tremor observed in 100%, rigidity in 70%, disturbances in the autonomic nervous system reflected on the cardiovascular, gastrointestinal and urinary tracts, orthostatic dizziness observed in 75%, dry mouth in 65% difficulties in swallowing in 40% and constipation in 70%. Teeth examination revealed that Parkinson's patients have a non - significant high means of decay and missing teeth compared with healthy subjects. The total saliva protein in Parkinson's patients is significantly higher than the corresponding value of healthy subjects. The extinction coefficient of uncontaminated protein in Parkinson's patients is significantly less than the corresponding values of healthy subjects and salivary ? - synuclein level is significantly less in Parkinson's patients than healthy subjects.Conclusions : Salivary ? - synuclein may serves as a biomarker for Parkinson's disease. Specific protein with extinction coefficient 27.5 M.Cm - 1 is secreted in saliva of Parkinson's patients. The characteristic saliva protein produced in patients with Parkinson's disease is deficient in tyrosine level and Dental care is required for both groups (Parkinson's patients and healthy subjects).

الاستريتين الفموي مقابل غلوكونات الزنك عن طريق الفم : دراسة علاجية مقارنة وعبورية في علاج مرض بهجت == Oral Acitretin Versus Oral Zinc Gluconate As A Comparative Cross - Over Therapeutic Study In Treatment of Behcet,S Disease

اسم المؤلف: سناء عبد الحميد حسين
اسم المشرف: هاجر ابراهيم عبد الله | عادل عبد الغفور النعيمي
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اساس البحث : مرض بهجت هو اضطراب جهازي حيث ان اسبابه المرضيه ليست محدده جيده.المظاهر الاكثر شيوعا هي الاغشيه المخاطيه الجلديه ولكن يمكن ان يشمل العين, انظمة القلب,الاوعيه الدمويه والجهاز العصبي. هناك العديد من طرائق المعالجه الموضعيه والجهازيه. تمت محاول | Background : Behcet’s disease is a systemic disorder where its etiopathogenesis is not well determined. The commonest manifestations are muccocutaneous but can involve eye, cardiovascular and neurological systems. There are many modalities of therapy topical and systemic.Isotretinion has been tried as an effective therapy of muccocutaneous manifestations. In present work was to try a new retinoid like acitretin which has longer half life than isotretinoin.Aims of the study : To evaluate the effectiveness of oral acitretin versus oral zinc gluconate in the treatment and prophylaxis of Behcet’s disease as a new therapeutic model.Materials and methods : This cross over controlled therapeutic study that conducted in the Department of Dermatology - Baghdad Teaching Hospital the period from August 2013 - May 2014.Twenty patients with fulfilled criteria of Behcets’s disease was included in this work. History and full examination were done for all patients regarding all demo - garaphic points related to the disease. They were given acitretin 25 mg orally once daily for three months to be seen on the day fourteenth firstly and then monthly to be assessed depending on the clinical manifestation index for Behcets disease. After three months, acitretin was stopped and patients were given zinc gluconate 25 mg twice daily for another three months. Results : Twenty patients were treated 12 males (60%), and 8 females (40%), with male to female ratio 1.5 : 1. All these patients completed the study and their ages ranged between 20 - 59 years with mean± SD (37.3±12.3). Pathergy both ordinary and oral were also minimized by this therapy while C - reactive protein was not much effective by this therapy. Zinc gluconate also had the same therapeutic action against these manifestations. Clinical manifestations index before treatment ranged between 1 and 11 with mean ± SD of 5.65±1.98.After acitretin therapy the mean of CMI started to decline to reach 2.65 ±2.03 in first month of the therapy with (p=0.00001) which was statistically high significant and continued high significant till the end of the third month with (p - value > 0.000001). After cessation of acitretin and zinc gluconate started the mean continued to decrease to reach 2.05±2.52 at the end of the first month with (p=<0.000001) which was statistically high significant then; started to increase to reach 3.3 ±2.31 at the end of six month of the therapy but statistically remained high significant (p - value=0.0007). Both acitretin and zinc gluconate have statistically significant effect in reducing severity and frequency of oral ulcers, genital ulcers, skin and rheumatologic manifestations. Conclusions : oral acitretin was found to be an effective therapy in addition to its prophylactic action in treatment of muccocutaneous manifestations of Behcet,s disease. Also zinc gluconate had effective therapeutic action against these features of Behcet’s disease.

تاثــير مستوى الاسترادايول والبروجستيرون في اللعاب على حالة صحة الفم عند النساء اثناء الحمل == Effects of Salivary Level of Estradiol And Progesterone On Oral Health Status In Women During Pregnancy

اسم المؤلف: زينة كامل كاظم
اسم المشرف: هاجر ابراهيم عبد الله
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: الحمل هو حالة فسيولوجية تجلب مجموعة واسعة من التغييرات في حياة المراة، بما في ذلك التعرض لامراض اللثة، ربما بسبب التغيرات الهرمونية المرتبطة مع الحمل. قد تؤثر الهرمونات الجنسية على اغشية الفم واللثة وربما هذا يؤدي الى العديد من الامراض اللثوية. ان هرمونا | Pregnancy is a physiological state that brings a wide range of changes in a woman’s life, including a susceptibility to gingival disease, probably due to hormonal changes associated with pregnancy. These female sex hormones may modify the oral mucosa and may lead to various degrees of gingival inflammation. The hormonal changes occurring during pregnancy may be associated with pregnancy gingivitis and gingival bleeding. Sex hormones are specific regulatory molecules have long been considered to play an influential role on periodontal tissues especially gingiva, bone turnover rate, wound healing and periodontal disease progression. Aims of the study1. Assessment of oral hygiene level and dental status in both second and third trimester pregnant women and compares results.2. Assessment salivary hormonal levels of endogenous female sex steroids in both second and third trimester pregnant women and compares results.3. Comparison of oral health status and endogenous female sex steroids salivary hormonal levels between gingivitis and non - gingivitis subgroups of both second and third trimester pregnant women groups.4. Find out the association between the gingival health status and salivary hormonal levels of endogenous female sex steroids (Estradiol and progesterone).Materials and methods This study was carried out on seventy - eight pregnant women who were attended for routine and regular follow up visits in obstetrics and gynecology department at Al - Yarmouk Teaching Hospital, from February 2013 to July 2013. This study was approved by the scientific committee in the department of oral medicine college of dentistry Al - Mustansiriya University. They were divided according to gestational age in to second trimester group and third trimester group. Fifty pregnant women (age range 18 - 38 years) and at gestational age was ranged between (20 - 27 weeks) were recruited as 2nd trimester group and Twenty - eight pregnant women (age range 18 - 39 years) at gestational age ranged between (28 - 33 weeks) were recruited as 3rd trimester group and according to Loe and Silness gingival index these two groups subdivided into gingivitis and non - gingivitis groups. Oral clinical examination including an assessment of gingival inflammation (Loe and Silness Gingival Index), Plaque amount (Silness and Loe Plaque Index), dental status (Decayed Missing Filling Teeth), and salivary flow rate (SFR) had also been done. Samples of whole unstimulated (resting) saliva were collected from all participants then investigated for sex steroids salivary hormonal levels of Estradiol, Progesterone. Results and discussion Oral health measurements including : GI, PLI, SFR and DMFT showed no significant difference between 2nd trimester and 3rd trimester groups. Sex steroids salivary hormonal levels of Progesterone showed a significant difference with higher mean value in 3rd trimester pregnant women than 2nd trimester pregnant women while sex steroids salivary hormonal levels of Estradiol showed no significant difference between two groups. Comparisons between gingivitis and non - gingivitis subgroups of 2nd trimester pregnant women group showed that there was highly significant difference in SFR with higher mean value in non - gingivitis group, and there was highly significant difference in PLI with higher mean value in gingivitis group, DMFT showed non - significant difference between the subgroups and (Estradiol and progesterone) salivary hormonal levels showed highly significant difference with higher mean values in gingivitis group. Comparisons between gingivitis and non - gingivitis subgroups of 3rd trimester pregnant women group showed that there was a non - significant difference in SFR, DMFT and a highly significant difference in PLI with higher mean value in gingivitis group, while progesterone salivary hormonal levels showed non - significant difference and Estradiol salivary hormonal levels showed a highly significant difference with higher mean value in gingivitis group. Comparison of GI between gingivitis groups of both 2nd and 3rd trimester pregnant women showed that there was a significant difference with higher mean value in 3rd trimester. Estradiol and progesterone salivary hormonal levels were non - significantly correlated with PLI and GI for gingivitis and non - gingivitis group of 2nd trimester pregnant women. Progesterone salivary hormonal level was non - significantly correlated with PLI and GI for gingivitis and non - gingivitis group of 3rd trimester pregnant women while Estradiol salivary hormonal level was non - significantly correlated with PLI and GI for non - gingivitis group and significantly correlated with PLI and GI for gingivitis group. GI and PLI for gingivitis groups of both 2nd and 3rd trimester revealed that there was a highly significant correlation.Conclusions Female Sex steroids hormones (Estradiol and Progesterone) salivary hormonal levels significantly increase from the second to the third trimester especially Estradiol and Play an important role in influencing gingival inflammation during pregnancy. These hormones are neither necessary nor sufficient to produce gingival changes by themselves. However, they may alter periodontal tissue responses to microbial plaque and thus indirectly contribute to gingivitis. Dental status in pregnant women is not significantly different between 2nd and 3rd trimester pregnant women groups. Women should be offered training in good oral hygiene habits, and community awareness programs should be conducted to increase their awareness of the crucial importance of such habits especially during pregnancy

التاثيرات الدوائية لمادة - كاپا كراجينان - في مهنية طب الاسنان : دراسات داخل وخارج الانبوب == The Pharmacological Effects of Kappa Carrageenan In Dental Practice : An In Vitro And In Vivo Studies

اسم المؤلف: اسيل جاسم علي
اسم المشرف: هاجر ابراهيم عبد الله | مروان صالح النمر
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: كاراجينان هومركب يحتوي على پولي كلايكان الكبريتي وهو مستخلص من الطحلب الاحمر. الكراجين بطبيعته الغروية المائية يمتلك خواص هلامية,مثخنة ومستحلبة تسمح باستخدامه بكثرة في الصناعات الغذائية,مستحضرات الصحة الفموية والكماليات.وبسبب مركباته الحياتية الفعالة فقد

Evaluation of the Involvement of the Tempromandibular Joint in Patients with Osteoarthritis and the Accuracy of Ultrasonography as Compared to Computed tomography for Detection of Osteoarthritic Changes.

اسم المؤلف: احمد عادل عثمان
اسم المشرف: هاجر ابراهيم عبد الله
الموضوع العام: طب الاسنان
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: خلفية البحث : اضطرابات المفصل الفكي الصدغي تشير الى مصطلح مركب يحتوي على عدة حالات تتضمن المفصل الصدغي ,التركيبات المحيطة او كلاهما , تظهر على شكل الم في منطقة المفصل والعضلات المرتبطة,وتحدد بالقدرة على الحركة الطبيعية مثل المضغ, الكلام والبلع. مرض التهاب | Tempromandibular joint disorders is a collective term embracing a number of conditions affecting the TMJ, the surrounding structures or both,manifested by pain in the area of joint and associated muscles, and limitation in the ability to make normal movement like mastication,speech and swallowing. Osteoarthritis is a group of mechanical abnormalities involving degradation of joints, including articular cartilage and subchondral bone. Symptoms may include joint pain, tenderness, stiffness, locking, and sometimes an effusion. A variety of causes—hereditary, developmental, metabolic, and mechanical deficits may initiate processes leading to loss of cartilage. When bone surfaces become less well protected by cartilage, bone may be exposed and damaged. As a result of decreased movement secondary to pain, regional muscles may undergo atrophy, and ligaments may become more lax.Objective of the study : • To determine the extent of tempromandibular joint involvement in patients with osteoarthritis.• To evaluate the correlation between clinical and radiographical findings. • To evaluate the accuracy of sonography in detection of osteoarthritic changes compared to Computed tomography.Materials and method : A comparative study had been done using thirty six symptomatic patients(24 female and 12 male) above 40 years diagnosed as osteoarthritis by specialist rheumatologist in Alkarkh general hospital, with clinical finding related to osteoarthritis like pain,tenderness,crepitation, clicking and limited mouth opening. these patients were exposed to computed tomography(CT) scan (Philips - Brilliance 64) in Al - Karkh general hospital and then the results were compared with sonographic findings (Philips 12.5 MHz transducer) to see the disc displacement, effusion, erosion, flattening, osteolytic and osteophytic lesions in the condylar head.The period of the study started from (october - 2013 to june - 2014).Results : The result of the study showed that the mean age of osteoarthritic patients was (49.69) years, and female percentage (66.7%) and male(33.3%). Chief complaine showed more predilection in the left side (28%) and bilateral showed(56%).Clinically : limitation in mouth opening (50%),crepitation(36.11%), clicking (27.7%), and tenderness (20.8%). Radiographically Computed tomography(CT) scan showed disc displacement (50%), joint effusion (37.5%), flattening(36.11%), osteophyte(18,05%), and erosion(11.1%). There was significant correlation between clicking and joint effusion in computed tomography(CT),while tenderness showed significant correlation with osteophyte and joint effusion in sonography. Other correlations were non significant correlation between clinical and radiological changes. Association between computed tomography(CT) and sonography showed fair agreement in osteophyte detection,fair agreement in joint effusion,moderate agreement in detection of joint erosion,moderate agreement in reduction of space and anterior disc displacement and also moderate agreement in condylar head flattening. Conclusions : Osteoarthritis in tempromandibular joint may be unilateral or bilateral. About 50% of Patients with osteoarthritis have limitation in mouth opening. Clinical findings play a major role in diagnosis of osteoarthritis. The tempromandibular joint changes in osteoarthritis were the results of degenerative processes, in contrast to rheumatoid arthritis were the changes as a result of the disease. Sonography was more likely to be sensitive rather than specific in detection of osteoarthritic changes

حدوث وشدة الالم بعد استخدام ثلاثة انظمة مختلفة لتحضير قنوات الجذور == Incidence And Severity of Pain Following The Usage of Three Different Root Canal Instrumentation Systems

اسم المؤلف: احمد حمد عبيد
اسم المشرف: جمال عزيز مهدي
الموضوع العام: طب الاسنان
السنة: 2014
الموضوع الدقيق: معالجة الاسنان
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Postoperative pain after endodontic procedures is an undesirable occurrence for both patients and clinicians. Certain factors may predispose to the development of postoperative pain. Knowledge of the causes and mechanisms behind interappointment pain in endodontics is of utmost importance for the clinician to properly prevent or manage this undesirable condition. The causative factors of interappointment pain encompass mechanical, chemical, and microbial injuries to the pulp or periradicular tissues, which are induced or exacerbated during root canal treatment. Ninety patients were recruited and included in this study out of one hundred and twenty patients, those patients requiring endodontic treatment on their permanent upper or lower molar teeth with asymptomatic irreversible pulpitis preoperatively, access opening and instrumentation was performed at the same visit.Patients ranged in age from 19 to 50 years old, and all were in good health, as determined from a written health history and oral interview.The patients were assigned randomly into three groups of 30 patients each : ? First group (n=30) : Teeth were instrumented using Universal ProTaper System (Full Rotary technique).? Second group (n=30) : Teeth were instrumented using ProTaper Next System (Full Rotary technique).? Third group (n=30) : Teeth were instrumented using WaveOne System (Reciprocating technique).Pain assessment carried out at day 1, 2, 3 & 7 using Verbal Rating Scale (4 - Point Scale). Patients recorded the incidence and severity of pain experienced.Patients were called at 24, 48 and 72 hours to obtain their reports for the first three days. Seven days after treatment their records were reviewed and percussion test was performed. Result showed that all groups induced Post - operative Pain, the difference is some systems cause more Post - Operative pain than other do : group 3 (WaveOne group) showed higher incidence and severity of PostoperativePain, followed by group 1 (Universal ProTaper group) that has shown less incidence and severity of Post - operative Pain than group 3 (WaveOne group), last group which it was group 2 (ProTaper Next group) has shown the lowest incidence and severity of Post - operative Pain. The data obtained were analyzed statistically using Chi Square test, total score for Verbal Rating Scale at day 1, 2, 3, and 7 showed that there was a highly significant differences between ProTaper Next group and other twogroups (P ? 0.001), and non - significant differences between ProTaper group and WaveOne group (P ? 0.05).

مستخلصات الشاي تاثيرها الذاتي او الاضافي على حياة خلايا السرطان : دراسة داخل وخارج الانبوب == Herbal Tea : Its Own Or Additive Effect On The Survival Of Cancer Cell Line : An In Vitro And Ex Vivo Study

اسم المؤلف: هدى غسان حميد
اسم المشرف: مروان صالح النمر | ناهي يوسف ياسين
الموضوع العام: الطب
السنة: 2014
الموضوع الدقيق: الادوية والسموم
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اجريت هذه الدراسة في فرع الفارماكولوجي في كلية الطب في الجامعة المستنصرية بالتعاون مع مركز ابحاث السرطان والوراثة\الجامعةالمستنصرية خلال الفترة من شهر كانون الثاني - شهراب لسنة 2014. الدراسة اقرت من قبل مجلس كلية الطب. صممت هذه الدراسة لتوضيح فعالية نبات ا | This study was conducted in the Department of Pharmacology at College of Medicine with incorporation of the Iraqi Center for Cancer and Medical Genetic Research at Al - Mustansiriya University, Baghdad, Iraq during 2014. This study was designed to elucidate the anti - cancer effect of Camellia sinensis by using four types of tea (black, green, white and oolong). Two experimental cancer models applied in this study; cancer cell lines (In vitro) and mice - bearing tumor (ex vivo). Several methodological and extracted aqueous and organic solvents were used to extract the tea. Microwave assisted extraction using distilled water as a solvent is applied in this study as the yield of bioactive substances are higher than other methods and organic solvents. The antioxidant activity was evaluated through the quantification of total flavonoids, total polyphenolic compound (bioflavanoids), total flavonols, reducing power, and proanthocyanidines. The scavenging property against reactive nitrogen species also was studied. The result showed that the different tea types contain approximately the same quantity of phenolic compounds; the only significant difference was in the proanthocyanidins level, which is a class of flavanols, found in high quantity in green tea compared with other tea extracts. Moreover, a significant scavenging property of peroxynitrite radical observed with all tea extracts. The extracts of black, green and oolong tea prevented or halted nitric oxide generation whereas the white extract tea promoted its generation, that is, a nitric oxide donor. The in vitro cytotoxic activity of Camellia sinensis in form of black, green, white and oolong tea was evaluated against four different types of cell lines. These are the AMN3 mammary cell carcinoma, Rhabdomyosarcoma, HeLa cells and Rat embryo fibroblast cells). The results showed greater effect of green and black tea over white tea and oolong tea against mammary cell carcinoma while the results of rhabdomyosarcoma cell line, which is an aggressive cancer cell, revealed a significant inhibitory effect of the growth of these cells by white and oolong tea extracts. All four types show almost equal percent of growth inhibition on HeLa cell line with the white tea been the most significant. A significant inhibitory effect of all tea extracts against the growth of rat embryo fibroblast cells indicated that the cytotoxic effect of the Camellia sinensis extended to normal cells and not specific to cancer cell. In addition, the antitumor effect of tea extracts was investigated (ex vivo) on BALB - c mice bearing - tumor. The volume, shape and color of the tumor masses were examined, in addition to measurement of the tissue malondialdehyde level as a biomarker of the lipid peroxidation, total tumor protein measurement and a histopathological study were done. The white tea showed antitumor effect by attenuating all the biomarkers of tumorogenesis. Herbal tea extracts induced DNA damage in term of separation the double strands molecule of calf thymus double stands DNA and human genomic DNA which may partly explained anti - cancer effect. We concluded that white tea extract is a promising nutrient that ameliorates the histopathological changes in mice bearing mammary tumor via generation reactive oxygen species by the evidence of activation lipid peroxidation process. Camellia sinensis plant can induce non harmful effect on DNA
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