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Influence Of Preparation Design Fracture

Author name: ميلاد باسل جرجيس
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
University location: Baghdad

New Concept Of 3D Obturation

Author name: حسين ارشد محمد
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Higher Diploma
University: Mustansiriyah University
University location: Baghdad

Endodontic Regeneration

Author name: هند جمال حمزة
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Higher Diploma
University: Mustansiriyah University
University location: Baghdad

Dental Ceramics

Author name: رشا عبد الحكيم كامل
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Higher Diploma
University: Mustansiriyah University
University location: Baghdad

Evluation Of The Effects Of Cytotoxic Drugs On The Vitality Of Dental Pulp In Patients With Breast Cancer Undergoing Chemotherapy

Author name: al - shamaa yassir mohammed abdul hussein
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
University location: Baghdad
Key words:
  • dental pulp - diseases

Puh Out Bond Strength Of Different Root Canal Obturation Materials

Author name: sundus hussein naser
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
University location: Baghdad
Key words:
  • root canal therapy

دراسة مقارنة لتقييم انتقال جدران القناة وقابليتها في التمركز باستخدام مبارد XP-Endo Shaper,WaveOne Gold and ProTaper NEXT Files. == A Comparative Evaluation of Canal Transportation and Centering Ability Prepared by XP-Endo Shaper, WaveOne Gold and ProTaper Next Files (In-vitro study)

Author name: يسرى حسب جاسب
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:

تقييم تاثير انحناء القناة على القناة الاجهاد الدوري لثلاثة انطمة من النيكل تيتانيوم الدوارة : دراسة مختبرية == Evaluation The Effect Of Canal Curvature On Cyclic Fatigue Of Three NiTi Rotary Systems ( In Vitro Comparative Study)

Author name: مصطفى عباس 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:

تقييم كمية الحطام المقذوف قميا باستخدام ثلاثة انواع من الادوات اللبية WaveOne Gold file system, ( المصنوعة من النيكل تيتانينوم Hyflex EDM file system, XP-endo Shaper file system == Evaluation Of The Apically Extruded Debris During Canal Preparation By WaveOne Gold, Hyflex EDM and XP-endo Shaper

Author name: مروة محمد عدنان
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:

قوة الكسر واستقرار اللون من القشرة المركبة المباشرة باستخدام مركبات تجميلية مختلفة : دراسة مقارنة مختبرية == Fracture strength and color stability of direct composite veneer using different restorative materials (In vitro study

Author name: محمد حمودي السنبلي
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 التسرب المجهري لقشور الاسنان التعويضية المصنوعة بصورة مباشرة وغير مباشرة باستخدام مواد مختلفة == Evaluation of marginal microleakage of laminate veneer restored with different materials (Comparative in vitro study)

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

الاجهاد المتكرر لمختلف انظمة مزلقات المسار في القنوات الصناعية احادية وثنائية الانحناء : دراسة مقارنة == Cyclic fatigue of different glide path systems in single and double curved simulated canals (A comparative study

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

فحص التسريب المجهري للقشور الخزفية المصنوعة من مواد سيراميكية مختلفة باستخدام طرق لصك مختلفة : دراسة مقارنة مختبرية == Microleakage of Different Laminated Veneer Materials with Different Adhesive Methods (A Comparative in Vitro Study)

Author name: عبد الرحمن فاضل حمد
Supervisor name: عمار عطالله علي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

فعالية XP-endo Finisher R, XP-endo Finisher EndoActivator, CanalBrush في ازالة دواء داخل القناة : دراسة مختبرية == Efficacy of XP-endo Finisher, XP-endo Finisher R, CanalBrush and EndoActivator in the removal of Intracanal medicament (An In vitro Study

Author name: طيبة طلال عبد العزيز
Supervisor name: ايمان محمد الزقة
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

قياس كمية الحطام المقذوف قميا خارج الجذر بعد استخدام تقنيات غسيل مختلفه : دراسه مختبريه == Measuring the Amount of Apically Extruded Debris After Using Different Irrigation Techniques (An in Vitro Study).

Author name: شدن صاحب حميد
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:

التسريب المايكروي للتحضير من الصنف الثاني باستخدام نوعين من الحشوات الراتنجية ومختلف بروتوكولات اللصق == Microleakage of class II cavity preparation restored with two different Bulk Fill Composite using different adhesive techniques (In vitro comparative study)

Author name: سيماء عبد الامير كاظم
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:

حدوث العيوب العاجية بعد تحضير قناة الجذر باستخدام مبارد النيكل تيتانيوم الدوارة المختلفة : دراسة مختبرية == Incidence of Dentinal Defects after Root Canal Preparation Using Different Nickel Titanium Rotary Instruments (An in Vitro Study)

Author name: سلسبيل وضاء حسين
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:

تاثير نوعيتين من التحضير الاطباقي على مقاومة الكسر للسن الضاحك بوجود مادتين من القشور الخزفية : دراسة مقارنة مختبرية == TheEffect of Two PreparationsDesign on The Fracture Resistance of Premolar Teeth Restored With TwoDifferent Porcelain Laminated Veneer (In Vitro Study)

Author name: رضاب عباس الزهيري
Supervisor name: عمار عطا الله السعدي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تقييم نظام لحشوات الجذور من حيث الفراغات والفجوات باستخدام المجهر الرقمي : دراسة مقارنة == Evaluation of CPoint Obturation System for Voids and Gaps Using Digital Microscope A Comparative study

Author name: ايس ليث قاسم
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:

مقاومه كسر القشور الخزفية المصنوعة من نوعين من السيراميك بوجود وعدم وجود الحشوة الراتنجية == Fracture resistance of two porcelain laminated veneer materials with and without CL V composite restoration (A comparative in vitro study)

Author name: اسراء محمد سعيد الدولعي
Supervisor name: عمار عطا الله السعدي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

كفاءة التنظيف لمبرد XP - endo Finisher بالمقارنة مع انظمة الارواء بالتردد الصوتي والتردد فوق الصوتي : دراسة خارج الجسم == Cleaning Efficiency of Xp - Endo Finisher File In Comparison With Sonic And Ultrasonic Irrigation Systems (An In Vitro Study)

Author name: مهند غازي عزاوي
Supervisor name: جمال عزيز مهدي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: This in vitro study was conducted to evaluate and compare the efficiency of XP - endo Finisher, EndoActivator sonic irrigation system and the NSK Varios ultrasonic irrigation system in removing dentin debris at three levels of root canals and to compare the percentage of dentin debris among the three levels for each irrigation system. Sixty freshly extracted upper molar teeth with straight palatal root canals were used in this study. All canals were prepared with ProTaper NEXT rotary files to size X4, 1mm from the anatomic apex with irrigation of 1 ml 2.0% NaOCl between the files. After that the samples were randomly distributed into three groups of twenty samples each, irrigated with 1 ml 2.0% NaOCl, followed by irrigant activation for 60 seconds with three different irrigation systems; group one, by using the XP - endo Finisher; group two, by sonic irrigation using the EndoActivator system; and group three, by ultrasonic irrigation using the NSK Varios, then all the groups received a final rinse of 5 ml 2.0% NaOCl. After the final rinse, the roots were split longitudinally into two parts and photographed with a professional digital camera. The digital images were then transferred into a computer and opened in Adobe Photoshop CC 2015 software and the canal was magnified 200x. The percentage of dentin debris remaining at the apical level (0 - 3mm), the middle level (3 - 6mm) and the coronal level (6 - 9mm) was calculated by dividing the number of pixels occupied by the dentin debris at each level by the number of pixels representing the entire canal area. Data were analyzed statistically by ANOVA and LSD at 1% and 5% significant levels. This study showed that cleaning the canal with the XP - endo Finisher or NSK Varios ultrasonic irrigation system resulted in significantly cleaner canals (P<0.01) than the EndoActivator sonic activation system at all canal levels. The XP - endo Finisher resulted in cleaner canals than the NSK Varios ultrasonic irrigation system at all levels, but the difference is not statistically significant (P>0.05). The apical level of all the canals showed a greater amount of dentin debris (P<0.01) compared to the middle and coronal levels, regardless of the irrigation device used.

تحليل القوى المستقرة لثلاثة انواع مختلفة من المواد الراتنجية بطريقة عملية وعددية == Static Stress Analysis For Three Different Types of Composite Materials Experimentally And Numerically

Author name: محمد وائل سعيد
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:
Abstract: t is important to analyze and compare the stresses induced in different composite material types during load application to know which type of composite will behave as preferred under the loading in the same circumstances. This study aimed at measuring and comparing the stress induced in Filtek ™ Z350 XT (3M ESPE) composite, Tetric EvoCeram ® (ivoclar vivadent) composite and BRILLIANT ™ NG (Coltène/Whaledent) composite experimentally and numerically.Experimental analysis included cavity preparation in the Brass block with a concave (U - shape) cavity which represent a proximal cavity preparation. This cavity was used as a mold for sample preparation. The internal line and point angles of the cavity (mold) were rounded and the dimensions of the cavity (mold) were 10mm × 10mm × 10mm (Total height of the box × Width of the top side of box × Length of the top side of box). The internal diameter of “U” was 5 mm at the base of the box. The mold was used to prepare forty five samples, fifteen samples for each type of composite material. So, three groups were prepared : Group A filled with Filtek ™ Z350 XT composite material, Group B filled with Tetric EvoCeram ® composite material and Group C filled with BRILLIANT ™ NG composite material.Electrical strain gauge (Tokyo Sokki, Japan) was embedded in composite material horizontally at the same level in each sample. Static load of 50 N was applied perpendicular to the center of the occlusal surface of composite restoration in each sample testing. The strain gauge was connected to a Wheatstone bridge with a signal amplifier which measures the strain during load application and gives the amplified signal from (0 to 4.8 volt) to LabJack data acquisition where a stream software give the final values of strain with the aid of a scaled equation of voltage. Then, the von Mises stress (effective stress) was calculated by using equations. Numerical analysis was done by using ANSYS 16.1 - (2015) (finite element tool) software that was used to create the 3 - Dimensional models represented the same materials and dimensions used experimentally. The physical characteristics of the composite models were inserted in the software which included Elastic modulus and Poisson’s ratio (?). Analysis was selected in a finite element method according to boundary conditions. A mesh size and an element size were estimated during the study. The stresses were calculated at static load of 50 N with the ANSYS 16.1 - (2015) software.The data were analyzed statistically by One - way ANOVA test and Least Significant Difference (LSD) test. One - way ANOVA test and LSD test results showed that there was a highly significant difference (P<0.001) presented between groups A and B, groups A and C and between groups B and group C. The Stress induced in BRILLIANT ™ NG composite after load application was the lowest stress value followed by Tetric EvoCeram ® composite and followed by Filtek ™ Z350 XT composite which was the highest stress value experimentally and numerically.

التسرب المايكروي لنوعين من القشرة الخزفية بوجود وعدم وجود الحشوة الراتنجية تحت جهاز التحميل الدوري == Microleakage of Two Porcelain Laminate Veneers Materials With And Without Composite Filling Under Cyclic Loading

Author name: ياسر علي النقيب
Supervisor name: عمار عطا الله علي السعدي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: Although investigators have evaluated the microleakage of porcelain laminate veneers, there is insufficient data regarding the durability of porcelain laminate veneers bonded to existing composite fillings. The aim of this study was to evaluate the microleakage of porcelain veneers restorations fabricated from two types of CAD/CAM ceramic blocks bonded to teeth with or without composite class V composite filling.Forty eight sound, crack - free human maxillary first premolar extracted for orthodontic reasons were selected for this study. Teeth were divided randomly into.2 main groups, which further divded into 2 groups (12 sample each). Group A1 : IPS e.max CAD veneers with standardized class V composite filling, Group A2 : IPS e.max CAD veneers, Group B1 : VITA Suprinity veneers with standardized class V composite filling, Group B2 VITA Suprinity veneers. The class V cavities was restored with nanofilled composite (Filtek™ Z350 XT, 3M ESPE). Standard veneer preparations were made using Ceramic veneer burs system (Keramikveneers. de, Komet). All the veneers were milled by CAD/CAM technology (CEREC MC XL, inLab SW 15, Sirona Dental Systems) Composite fillings (groups A1 and B1) were sandblasted with alumina oxide.Porcelain veneers were cemented in place using light - cured resin cement (Rely Veneer Cement, 3M ESPE), Then the specimens were stored at 37? in distilled water for 2 weeks. Then mechanical load cycling (50,000 load cycle of 49 N at 2.5 Hz) and thermocycling procedure (500 cycles of 5 - 55 Co with 20 sec dwell time) were done. The specimens’ crowns were immersed in 2% methylene blue dye for two days, then mounted in clear acrylic before sectioning with a 0.35 mm microtome. Microleakage percentage were recorded using stereomicroscope and ImageJ program. Results were checked for normality of distribution (Kolmogorov - Smirnov test and Shapiro - Wilk test), and were analyzed with twoway ANOVA and independent samples t - tests. Two way ANOVA shows the significant effect of type of ceramic restoration and the highly significant effect of composite filling, however, the interaction between the main factors was non - significant. The results showed that the lowest mean of microleakage percentage was recorded for group A2 (4.6058% ± 1.5091) which considered statistically significant compared to group B2 (6.105%±1.456), and statistically highly significant compared to group A1 (6.6075%±1.3259) while group B1 recorded the highest mean of microleakage percentage (7.3158%±1.38713). In conclusion, the type of ceramic restoration and the presence of class V filling both had significant effects on microleakage of porcelain veneers. IPS e.max CAD veneers had significantly lower microleakage percentages compared to VITA Suprinity veneers. The presence of class V composite filling within the cervical finishing line of porcelain veneers had a highly significant higher microleakage percentage compared to groups without composite filling.

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

Author name: نور الدين علي سعيد
Supervisor name: ايمان محمد الزقة
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: 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.

قوة الدفع الرابطة الى الخارج والتسرب القمي للمواد (MTA Plus, Biodentine and Bioceramic) بتقنية حشوة ثلث القمي للجذر : دراسة مختبرية == Push - Out Bond Strength And Apical Microleakage of (Mta Plus, Biodentine, And Bioceramic)As Apical Third Filling (An In Vitro Study)

Author name: عبير علي عباس
Supervisor name: جمال عزيز مهدي
General topic: Dentistry
Specific topic: Dental Treatment
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
Abstract: اجريت هده الدراسة المختبرية لتقيم قدرة ختم لثلاث مواد استعملت ( بتقنة حشوة ثلث القمي لقناة الجذر ) باستعمال اختبار قوة الربط الدفع الى الخارج ودراسة التسرب القمي.ستين جذر حلقي الاسنان العلوية ذو قناة مستقيمة ذات فتحة قمية مكتملة التكوين مختارة بعناية وفق | This study was conducted to evaluate the sealing ability of three materials used as apical third filling by using push - out bond strength test and apical microleakage study.Sixty straight palatal roots of freshly extracted maxillary first molars were selected. All teeth had mature apices, selected carefully according to specific criteria. The roots were instrumented using crown down technique with rotary Protaper universal system, instrumentation were done with 5ml of 2.5% sodium hypochlorite used as irrigation between files, 17% buffered solution of EDTA was used as final irrigant followed by 2.5% sodium hypochlorite then 10ml distilled water to remove any remnant of irrigant. Roots were randomly divided into three groups according to the filling materials used ( twenty roots for each group) : Group (1) : MTA Plus ( 4mm thickness) using as apical third filling. Group (2) : Biodentine (4mm thickness) using as apical third filling.Group (3) : Bioceramic root repair material (4mm thickness) using as apical third filling.Easy and Quick (E&Q) obturation system were used to complete obturation of roots. After incubation period at 37 °C for three days. Ten roots from each group were used for push - out test, after root were embedded in clear acrylic resin, sectioned at apical level in 2mm and 4mm from root apex to provide slice 2mm in thickness. The bond strength was measured using computerized universal testing machine, each section fixed in the machine so that the load applied from apical to coronal direction at 0.5mm/min speed and the computer drew curve to show the higher bond force before dislodgment of the filling material. These force were divided by surface area to obtain the bond strength in MPa.After debonding each sample was examined under Stereomicroscope and the type of failure mode was recorded. The result showed non significant different between Biodentine group and MTA Plus group. Biodentine group showed a very high significant difference with Bioceramic material group. Also high significant difference between MTA Plus group and Bioceramic material group. The Biodentine group showed highest mean of bond strength in comparison to other test group.Ten roots remain from each group used for apical microleakage study. The roots submerged in 2% methylene blue for three days. The roots were cleared and the degree of linear dye penetration was measured in millimeter by stereomicroscope under 40 X magnification with calibrated scale ocular grid. The result showed the Biodentine group lowest mean of microleakage than other group while Bioceramic material group showed high mean of microleakage than other groups. There are no significant difference among groups. There is positive correlation between push - out bond strength and an apical dye penetration in microleakage for each group of material.
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