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تقييم مقارن لقوة الترابط لاربعة انواع من السدادات اللبية باستخدام اختبار الدفع == A Comparative Assessment of the Bonding Strength of Four Types of Endodontic Sealers Using Push - Out Test

Author name: محمد عبد الهادي محمد
Supervisor name: بلند محمد سليم شكري
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

قوة الربط القصية للقشور الخزفية التجميلية للرحى المعمولة من مواد مختلفة بواسطة تصميم وخراطة الحاسوب : دراسة مختبرية == Shear Bond Strength of Posterior Occlusal Veneers Fabricated from Different Types of CAD / CAM Materials : An in Vitro Study)

Author name: محمد ستار جبار
Supervisor name: محمد قاسم غلام
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

مقاومة الكسر للضواحك العلوية المرممة بالتركيبات الجزئية باستخدام المواد المركبة وقوالب ثنائي سيليكات الليثيوم المصممة والمنحوتة بمساعدة الحاسوب : دراسة مختبرية == Fracture Resistance of Maxillary Premolars Restored with Inlay and Onlay Using Composite and Lithium Disilicate CAD/CAM Block Restorations (An In Vitro Study

Author name: محمد جمال عبد الحليم
Supervisor name: حيدر حسن جاسم
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير تطبيق بروتوكولات مختلفة للحشوة الراتنجية السائلة على التسرب الدقيق لحشوة كلية التصلب موضوعة في تجويف صندوقي الشكل : دراسة مختبرية == Effect of Different Application Protocols of Flowable Composite on Microleakage of Proximal Box - Shaped Bulk - fill Restoration: An in vitro Study

Author name: كرار محمد عاجل
Supervisor name: احمد مصطفى صليبي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
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تقييم مقارن للحطام المبثوق قميا اثناء تحضير قناة الجذر باستخدام انظمة ملفات R - Motion وWaveOne Gold وProTaper و EDM HyFle == Comparative Evaluation of Apically Extruded Debris During Root Canal Preparation Using R - Motion, WaveOne Gold, ProTaper Next, and HyFlex EDM File Systems

Author name: فرح باسم محمد صالح الصفار
Supervisor name: حكمت عبد الرحيم الغراوي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تقييم مقارن لانتقال القناة وقدرة التمركز في قنوات الجذر المحاكاة المحضرة باستخدام نظام R - Motion == A Comparative Evaluation of Canal Transportation and Centering Ability in Simulated Root Canals Prepared by R - Motion File System

Author name: عمر مثنى فهران
Supervisor name: حكمت عبد الرحيم الغراوي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

التقييم المختبري لتاثير الادوات اليدوية والسوائل المختلفة على دقة ثلاثة اجهزة محددة لقمم الجذور == In vitro Evaluation of the Influence of Different Instruments and Irrigants on the Accuracy of Three Apex Locators

Author name: عمر احمد بدر
Supervisor name: منال حسين عبد الله
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

مطابقة لون ال كومبوزت Omnichroma وتحليلها باربع طرق لقياس اللون == Shade Matching of Omnichroma Analysed by Four Shade Detection Techniques

Author name: عبد الوهاب ملاذ عبد القادر
Supervisor name: محمد قاسم غلام
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
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تقييم تومغرافي لكفاءة ثلاث انظمة معالجة دوارة من خلال اعادة المعالجة اللبية لقنوات جذور محشوة بطريقتين مختلفتين == Tomographic Evaluation of The Efficacy of Three Rotary Retreatment Systems for Retreatability of Root Canals Obturated with Two Different Techniques

Author name: طارق عزيز حمزة
Supervisor name: مها مساعد يحيى الزاز
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

اختلال حافات الاغلفة المعدنية المصنعة من معدن الكروم كوبلت باستخدام طريقة الخراطة والطباعة : دراسة مختبرية == Evaluation of the Marginal Discrepancy of Cobalt Chromium Metal Copings Fabricated with Additive and Subtractive Techniques (An in Vitro Study

Author name: صفا ثائر نوري
Supervisor name: محمد قاسم غلام
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير تصميم التحضير على توزيع الاجهاد في قشور الليثيوم ثنائي السيليكات الخزفية باستخدام تحليل العناصر المنتهية == The effect of preparation design on stress distribution in lithium disilicate laminate veneer using 3D Finite Element Analysis

Author name: شهد عماد عبد
Supervisor name: محمد قاسم غلام
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير حركتين على انتقال القناة وتمركزها لمبارد WaveOne Gold وOne Curve == Influence of Two Kinematics on Canal Transportation and Centering Ability of WaveOne Gold and One Curve files

Author name: رغدة عبد الكريم رجب
Supervisor name: ايمان احمد محمد
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تقييم مقدار الافراز الفوري والتجميعي للفلورايد لحشوات الالكاسايت مع وبدون الالتصاق بهيكل السن == Evaluation of Immediate and Cumulative Fluoride Release of Alkasite Filling Materials with and without Bonding to Tooth Structure

Author name: حسين ارشد محمد
Supervisor name: منال حسين عبدالله
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تقييم مقارن لقوة الكسر للتيجان المتجانسة المدعومة بالزرعات السنية المصنعة من مواد راتنجية هجينة مختلفة والمنحوتة بمساعة الحاسوب : دراسة مختبرية == Comparative Evaluation of the Fracture Strength of Monolithic Implant Supported Crowns Fabricated from Different Hybrid Composites CAD/CAM Materials : An in vitro Study

Author name: جعفر محمد علي
Supervisor name: حيدر حسن جاسم
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة تاثير التسخين المسبق للمركبات الراتنجية ذو الطبقة الواحدة على انحراف الاحداب والفجوات الحافية لتجاويف MOD بطرق تقنية مختلفة == Effect of Preheating and Different Placement Techniques of Bulk-Fill Composite Resin on Cuspal Deflection and Marginal of MOD Cavities

Author name: تقى جميل ابراهيم
Supervisor name: منال حسين عبد الله
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير اختلاف بعد مسافة التصليب على درجة التقارب والصلابة الدقيقة لمواد الحشوات المركبة السائلة == The Effect of Different Curing Distances on the Degree of Conversion and Microhardness of Flowable Bulk Composite Materials

Author name: اية عصام سلمان
Supervisor name: منال حسين عبد الله
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تحليل مقارن للتطابق الحافي لسدادات مختلفة لحشو الاقنية الجذرية باستخدام المجهر الالكتروني الماسح == Comparative Analysis of Marginal Adaptation of Different Root Canal Sealers Using Scanning Electron Microscope

Author name: انس سامي عواد
Supervisor name: ايمان محمد الزقة
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير تقنيات التقوية بالالياف على مقاومة الكسر للضواحك المعالجة لبيا : دراسة مقارنة مختبرية == Effect of Fiber Reinforcement Techniques on Fracture Resistance of Endodontic Treated Premolars : Comparative In Vitro Study

Author name: ان ضرغام هاشم
Supervisor name: حيدر حسن جاسم
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير التعقيم بواسطة الاوتوكلاف على مقاومة الاجهاد و EdgeFile X الدوري لادوات النيكل تيتانيوم 7 F - One 2 وShape : دراسة مقارنة == Influence of Autoclave Sterilization on the Cyclic Fatigue Resistance of EdgeFile X7, 2Shape and F - One NiTi Instruments : A Comparative Study

Author name: اركان حسن علي
Supervisor name: حكمت عبد الرحيم الغراوي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

الاجهاد الدوري الداينميكي لمبارد Race Evo وVdw. Rotate وOne Curve و2Shape في قناة منحنية على شكل حرف S بدرجة حرارة الجسم : دراسة مقارنة == Dynamic Cyclic Fatigue of Race Evo, Vdw. Rotate, One Curve and 2Shape Files in S - shaped Canals at Body Temperature : A comparative study

Author name: احمد نهاد حميد
Supervisor name: احمد صليبي مصطفى
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

مقاومة الاجهاد الدوري لمبارد الهايفلكس اي دي ام والبروتيبر جولد في مواقع مختلفة من انحناء القناة == Cyclic Fatigue Resistance of Hyflex EDM and ProTaper Gold Files at Different Locations of Canal Curvature

Author name: احمد عبود مالك
Supervisor name: ايمان محمد الزقة
General topic: Dentistry
Specific topic: Dentistry
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

قدرة النقل والتمركز لانظمة النيكل تيتانيوم Race Evo,Edgefile X7,Fanta Af F One and 2shape التي تم تدويرها في قنوات جذر محاكاة : دراسة مقارنة == Transportation and Centering ability of Race Evo, Edgefile X7, Fanta Af - F One, and 2Shape Ni - Ti systems rotated in simulated root canals: A comparative study

Author name: احمد جودت رشاد
Supervisor name: مها مساعد يحيى
General topic: Dentistry
Specific topic: Dentistry
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تقييم التوافق الحيوي والخواص الميكانيكية لسيليكون الوجه والفكين معزز بجزيئات نيتريد البورون السداسية == Evaluating the Biocompatibility and Mechanical Properties of Maxillofacial Silicone Enhanced by Hexagonal Boron Nitride Particles

Author name: منتظر سلام علي
Supervisor name: فائزة محمد حسين عبد الامير
General topic: Dentistry
Specific topic: Prosthodontics
Degree: Master
University: University of Baghdad
Language: English
University location: Baghdad
Key words:
  • Maxillofacial prostheses
  • Maxillofacial silicone
  • Biocompatiblity
  • Mechanical properties
  • Hexagonal boron nitride
First pages:
Abstract: Maxillofacial silicone is the most popular material in the fabrication of maxillofacial prostheses. However, the material did not meet the desired qualities of maxillofacial prosthesis due to mechanical properties limitations. This study aims to evaluate maxillofacial silicone’s biocompatibility after the addition of hexagonal boron nitride (H-BN) particles concerning cytotoxicity and skin irritation, as well as its mechanical properties. Methodology: Eighteen specimens of maxillofacial silicone (VST-50F) incorporated with different percentages of H-BN (0, 0.1, 0.3, 0.5, 0.7, and 1 wt%) were tested for cytotoxicity in vitro by direct contact test. Then, cell viability was determined by cytotoxicity assay. Twelve specimens were applied in vivo to the backs of five rabbits for 4 hours, followed by evaluations of the skin irritation. The experimental groups (control, 0.5 wt%, and 0.7 wt%) were selected after the pilot study. 10 specimens out of 120 specimens were utilized to assess each mechanical property (tear strength, tensile strength, elongation percentage, Shore A hardness, and surface roughness). The specimens were studied using field emission-scanning electron microscope (FE-SEM) with energy dispersive X-ray spectroscopy (EDX) and Fourier transform infrared spectroscopy (FTIR). One-way ANOVA and Tukey’s tests were used to assess the data, with P-value < 0.05 indicating statistical significance. Results: The results revealed a negligible effect of the modified maxillofacial silicone to the cell viability after 72 hours of incubation and there was no skin irritation. The FE-SEM and EDX findings showed evenly dispersed H-BN within the VST-50F silicone. The FTIR revealed no chemical interaction between the silicone and H-BN. Both experimental groups showed a significant increase in tear strength and a significant decrease in Shore A hardness and surface roughness. The 0.5 wt% group showed a non-significant drop in tensile strength and elongation percentage. However, the 0.7 wt% group showed a significant decline. Conclusion and recommendations: This study suggests that maxillofacial silicone is safe up to 1 wt% of H-BN in terms of cytotoxicity and skin irritation. As the percentages of H-BN increased, tear strength improved, whereas tensile strength, elongation percentage, Shore A hardness, and surface roughness were reduced. However, the remaining biocompatibility tests need to be investigated before being used on humans.
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المتغيرات الذوقية والشمية لدى اطباء الاسنان المصابين بمرض كوفيد-19 فيما يتعلق بالتغير الجيني ل FUT2 ومستويات الاجسام مضادة في المصل واللعاب == Gustatory and olfactory changes among dentists with COVID-19 in relation to FUT2 gene polymorphism, serum and salivary antibody titers

Author name: فريال محمود عبد الرضا
Supervisor name: امينة ريحان دعيجل
General topic: Dentistry
Specific topic: Dentistry
Degree: Doctorate
University: University of Baghdad - Faculty Of Dentistry - Department of Oral Medicine
Language: English
University location: Baghdad
Key words:
  • covid-19
  • Anti s and anti n specific to corona virus titers
  • gustatory and olfactory loss
First pages:
Abstract: Background: Corona virus disease (COVID-19) manifested as acute respiratory distress syn-drome affected millions of people worldwide. Dentists are at increased risk of acquir-ing occupational infections. The infection susceptibility is linked with the both Anti-gen blood grouping system (ABO) and the alpha (1,2) fucosyl transferase (FUT2) se-cretor. Sudden onset of anosmia and/or ageusia symptoms could be enough to isolate patients and vaccinated participants even without doing the COVID-19 test. This study aimed to assess the changes in the chemical sense by one of objective methods the Connecticut Chemosensory Clinical Research Center Test (CCCRC). Assessed post-COVID Immuno-globulin A and G immunity, quantification of salivary biomarkers for prognostication, and immune surveillance. to find any association between specific ABO blood groups and FUT2 secretor status and COVID-19 in a sample of Iraqi den-tists. Methodology: For each 133 participants, a questionnaire including demography, COVID-19 status, blood grouping, Rhesus factor, with chemo sensitive symptoms was recorded using n-butyl alcohol and environmentally realistic odorants and calculated in a modi-fied way for the detection of olfactory function. The gustatory test scoring was done using the four standard primary tastes. A cross-sectional study was done on 91 out of 133 working Iraqi dentists from June to August 2022. The dual IgG and IgA for both spike and Nucleocapsid proteins (s1 & n) specific to COVID-19 were measured by En-zyme linked immunosorbent assay (ELISA)-specific kits from serum and saliva. For randomly selected 36 out of 91 participants Cluster of Differentiation 4 (CD4) and subtypes T helper 1 and T helper 2 were counted by flow cytometry from fresh whole peripheral blood. The DNA was extracted from salivary leukocytes for all study partic-ipants. Molecular detection of the FUT2 gene by real-time Polymerase Chain Reac-tion and the data were sequenced and the phylogenetic tree was drawn for randomly selected 20 participants. Results: participants were more commonly females (81,61%) with the majority were be-low 35 years of age (97,72%). Half of the participants experienced smell and/or taste loss during the COVID-19 infection; whereas (133;99.2%) recorded by CCCRC had olfactory dysfunction and (105,78.2%) had gustatory dysfunction. Males were with a higher significant rate of taste loss (P=0.009) whereas females with a higher recovery rate within the first two weeks after the onset than males. The Pfizer vaccine was sig-nificantly related to smell loss (P=0.038). All cells’ levels were reduced and signifi-cantly associated with a positive COVID-19 infection whereas the CD4 was signifi-cantly related to the Pfizer vaccine, loss of both sense and recovery time within 15 days. A high significant positive correlation was found between CD4 and Th2, IgG n in serum; was highly significantly related with positive COVID-19 infection higher than that of serum IgG s1. Noticeably, the IgA (s+n) in serum was negatively correlated with Th1 and Th2, could be detected in individuals with a duration from last infection >1-2 years and last vaccine duration > 6- 12 months. Blood group O was the most pre-dominant among this study participants (40%), followed by B, A, and AB with (90%) of them were RH+. A significant relationship between smell dysfunction and infected blood group A and RH+ (p =0.044, 0.038) while taste dysfunction was negatively and significantly correlated with AB group (r=-0.73; p=0.008). The FUT2 secretor showed a significant relation with COVID-19 infection and frequency. The majority of COVID-19-infected participants experienced a significant loss of both smell and taste with fast recovery within 2 weeks. Conclusions: The COVID-19 infection susceptibility and reinfection associated with FUT2 secretor status and greatly related to olfactory and gustatory sense loss. Sex variation was noticed with more predominant to females in dysfunction and faster recovery from dysfunction. The blood group A was associated with olfactory dysfunction and more with Pfizer vaccine. The low level of CD4 and an imbalance Th1/Th2 ratio made the recovered individual more susceptible to re-infection but the significantly high percentage of specific COVID antibodies followed one time of infection or booster vaccine dose gave their protection.
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التحليل العملي والعددي لمواد متراكبة من البولي ميثيل ميثاكريلات لتطبيق طقم الاسنان == Experimental and Numerical Analysis of PMMA Composite Materials for Denture Application

Author name: وسن سهيل حسين
Supervisor name: جواد كاظم عليوي | قحطان عدنان حمد
General topic: Dentistry
Specific topic: Orthodontics
Degree: Doctorate
University: University of Technology - Department Of Materials Engineering
Language: English
University location: Baghdad
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