نتایج جستجو برای: based composite

تعداد نتایج: 3026893  

جولانی, محمد, زاجکانی, الهام, فقیه‌زاده, سقراط,

Background and Objective: Polymerization shrinkage in composite resins is responsible for microleakage restoration. A recently introduced composite resin Filtek P90 is based on siloxanes and oxiranes which polymerize by cationic "ring opening" polymerization resulting in reduced polymerization shrinkage. The aim of this study was comparative evaluation of microleakage in class II cavities resto...

Wood is a naturally renewable material with both continuous and isolated pore systems. Wood-composite panels have the privilege of offering a homogeneous structure to be used as constructional and structural materials. However, its nature makes it susceptible to biological wood-deteriorating agents, water absorption and thickness swelling, fire, etc. Using nano-materials are very easy in the wo...

Journal: :علوم و فنون بسته بندی 0
محمد رضا عبدالهی مقدم ناصر صداقت

protein based films used for food packaging despite having numerous benefits like biodegradability and renewability suffer from essential drawbacks of weak mechanical and water vapour barrier properties. in recent years efforts for improving functional properties of such films from various resources, through modifying formulation, molecular crosslinking and promote proteins based composite film...

Journal: :journal of dentistry, tehran university of medical sciences 0
masoumeh hasani tabatabaei sedigheh sheikhzadeh hamidreza ghasemi monfared rad ahmad beygi hossein bagheri

objectives: several studies have assessed the characteristics and properties of silorane-based composites and adhesive systems. considering the extensive application of tooth-whitening agents, possible deteriorative effects of tooth bleaching agents on these restorative materials must be studied. the aim of this study was to evaluate the effect of an in-office carbamide peroxide-based tooth ble...

ژورنال: مجله دندانپزشکی 2015
خسروانیان, محدثه , دانش کاظمی, علیرضا , داوری, عبدالرحیم , یاسایی, صغری ,

  Background and Aims: Orthodontic bracket failure during treatment is a common problem. With the introduction of low shrinkage composites the question is that whether: this sufficient has coefficient bond strength for bonding bracket during orthodontic treatment. The aim of this study was to compare the shear bond strength (SBS) of silorane-based and metacrylate-based composites to metal brack...

Wood is a naturally renewable material with both continuous and isolated pore systems. Wood-composite panels have the privilege of offering a homogeneous structure to be used as constructional and structural materials. However, its nature makes it susceptible to biological wood-deteriorating agents, water absorption and thickness swelling, fire, etc. Using nano-materials are very easy in the wo...

S.Jadid, S.Jalilzadeh,

This paper presents a new composite index to analyze power system transient stability. Contingency ranking in power system transient stability is a complicated and time consuming task. To prevail over this difficulty, various indices are used. These indices are based on the concept of coherency, transient energy conversion between kinetic and potential energy and three dot products of the s...

هدایتی مرزبالی, مهدی, احمدی زنوز, غزاله, اسمی, فاطمه, امیری دانشور, فرشید, خفری, ثریا, زابلی, امین,

Background and purpose: Microleakage occurs in posterior composite restorations due to polymerization shrinkage. In recent years low shrinkage silorane-based composites have been introduced to reduce microleakage. The aim of this study was to evaluate the effect of three different restoration techniques on gingival microleakage of a silorane-based composite in class II restorations. Materials ...

Journal: :Statistical Analysis and Data Mining: The ASA Data Science Journal 2020

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