نتایج جستجو برای: three resin composites were used

تعداد نتایج: 5259100  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان - دانشکده علوم انسانی 1390

the main purpose of this study was to investigate any relationship between high school efl teachers metaphorical understandings of their role in class and their self-efficacy beliefs. teachers metaphors were elicited through two different prompts: one picturing what they believed a language teacher should be like in class, and the other demonstrating what they are actually like in class; such...

ژورنال: مجله دندانپزشکی 2005
امینی, مریم , عطائی, محمد , یاسینی, اسماعیل ,

Statement of Problem: The relatively poor wear resistance of dental composite in stress bearing posterior situations has restricted wider clinical application of this restorative material. Purpose: The aim of this study was to evaluate the three body abrasive wear of a dental composite based on a new filler (leucite: KAl Si2O6) and to compare it with the wear resistance of a composite based on ...

دانش کاظمی, علیرضا, داوری, عبدالرحیم, مشتاق, ساجده, موسوی نسب, سیدمجید,

Introduction: One of the most important factors affecting the marginal seal of composite restorations is polymerization shrinkage. The aim of this study was to evaluate the micro leakage of two resin composites cured with two light directions. Methods: In this experimental study, forty similar class III preparations were prepared in 40 human anterior teeth. The teeth were randomly divided in t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیخ بهایی - دانشکده زبانهای خارجی 1392

the purpose of this study was to investigate the impact of blended learning and multimedia softwares on iranian efl students vocabulary learning. in addition, the present study tried to examine the extent to which multimedia softwares can be applied into efl classes in iran. it also attempted to find out students attitudes toward using these softwares. to this end, 87 iranian efl learners at el...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده ادبیات و علوم انسانی 1391

‘romanticism’ and ‘romantic’ are among the most controversial terms in literature. most readers, when encountering these words, would think of the well-known period of romanticism of the first three decades of the nineteenth century and the great six english poets known as ‘the big six’ of this period. however, romanticism does not belong to certain artists in a special period; one may seek ele...

Journal: :Dental materials journal 2018
Takatsugu Yamamoto Masao Hanabusa Saori Kimura Yasuko Momoi Tohru Hayakawa

The objective of this study was to investigate changes in polymerization stress and elastic modulus for light-cured bulk-fill resin composites following irradiation. Crack analysis was applied to obtain the stresses for 24 h after irradiation, which were calculated from the lengths of cracks in a glass mold bonded to the composites. The elastic modulus was repeatedly measured by nano-indentatio...

2011
Hye-Jung Park Sung-Ae Son Bock Hur Hyeon-Cheol Kim Yong-Hoon Kwon Jeong-Kil Park

The degree of resin polymerization achieved during a restoration placement is a major factor in the success and predictability of resin composite restorations. The polymerization of resin composite depends on many intrinsic conditions, such as the type of the photoinitiator, composition of filler particles, shade and degree of translucency of the materials. In addition, the effective spectral o...

ژورنال: مجله دندانپزشکی 2013
آرامی, سکینه, حسنی طباطبایی, معصومه, عطایی, محمد, ولی‌زاده, سارا, پهلوان, ایوب,

Background and Aims: Polymerization shrinkage in Methacrylate-based composite is one of the most important factors in composite restorations failure. Silorane-based composite is introduced to compensate this drawback and claimed to have low shrinkage. The aim of this study was to evaluate the polymerization shrinkage of these two composites. Materials and Methods: In this experimental study, 5...

Journal: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
علیرضا دانش کاظمی ar danesh kazemi عبدالرحیم داوری ar davari حسن بیدرام گرگابی h ‍bidram - gargabi

introduction: in different investigations, the destructive effect of ultrasonic scalers on the margins of composites has been studied, but there are very few studies on the effects of ultrasonic scalers on the microleakage of poly-acid modified composite resin and resin modified glass ionomers. the main purpose of this study was to evaluate the marginal microleakage of class v preparations rest...

2007
R. YUSOFF M. K. AROUA A. NESBITT R. J. DAY

The main objective of this work is to compare the difference between microwave heating and conventional thermal heating in fabricating carbon/epoxy composites. Two types of epoxy resin systems were used as matrices, LY5052-HY5052 and DGEBA-HY917-DY073. All composite samples were fabricated using resin transfer moulding (RTM) technique. The curing of the LY5052-HY5052-carbon and the DGEBA-HY917-...

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