نتایج جستجو برای: color stability

تعداد نتایج: 418007  

Elham Zajkani

Introduction: The growing demand for esthetic dental procedures has resulted in the increased development of new restorative composite resins. The success of composite resin restorations depends on their color stability over time. The present study aimed to evaluate the effects of 0.2% chlorhexidine (CHX) and re-polishing on the color stability of nanofilled composite re...

Journal: :Journal of dentistry 2012
Yan-Fang Ren Lin Feng Diana Serban Hans S Malmstrom

OBJECTIVES To study the color stability of dental composite resins using a thermocycling stain challenge model accounting for the complex effects of oral environment and tooth brushing. METHODS Composite resin discs were made from Filtek Supreme Ultra (FiltekSU), TPH3 and Renamel, and subjected to thermocycling challenges in warm coffee (55 °C/pH 5.2) and a cold tea and fruit juice mixtures (...

2013
Leonardo Fernandes da Cunha Samantha Schaffer Pugsley Baratto José Mondelli Gisele Aihara Haragushiku Carla Castiglia Gonzaga Adilson Yoshio Furuse

Introduction: The color stability of composite resins is a fundamental factor in their clinical behavior. Objective: To evaluate the color stability of composite resins of different colors exposed to a colabased soft drink after different storage periods. Additionally, three methacrylate-based materials and one silorane-based material were evaluated. Material and methods: Specimens of three met...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده مهندسی شیمی 1393

هدف از این تحقیق بررسی کارایی فرایند الکتروفنتون و بهینه سازی پارامترهای موثر بر فرایند به کمک طراحی آماری به منظور تصفیه پساب شرکت پتروشیمی شازند میباشد.در این تحقیق تاثیر پارامترهای : زمان واکنش ، چگالی جریان، ph پساب ، نسبت (?ml h?_2 o_2)/( lit pw) و نسبت مولی (mol h_2 o_2)/(mol fe^(2+) ) بر حذف cod و color از پساب پتروشیمی تحت فرایند الکتروفنتون( با الکترود های آهن و آلومینیوم به طور جداگان...

2016
ChoungHun Lee OkHue Cho Hanmoi Sim WonHyung Lee

Because of the school study and declining of playground, children in modern society have no time to stay with their parents and they are contacting with the game frequently. The game graphics can give significant impact via visual information and interaction to immature child. Game graphic using color psychology and color therapy technique make children stable, positive and have healthy ego. Th...

ژورنال: مجله دندانپزشکی 2013
احمدزاده, اسداله, زارعی, مریم, کاویانی, آزیتا,

Background and Aims: Discoloration of resin composites is considered to be the major factor in esthetic restoration failures. The aim of this study was to evaluate the color stability of resin composites after rebonding with two different adhesive materials. Materials and Methods: Forty five composite disc samples were divided into three groups (n=15). The surface of specimens was finished by ...

Journal: :Journal of animal science 2012
D A King S D Shackelford N Kalchayanand T L Wheeler

The present study was conducted to determine the repeatability of color stability measurements and to evaluate relationships among color stability data collected under differing sampling and aging protocols. Beef (Bos taurus) carcasses (n = 100) were selected at grading in a commercial facility, after which a LM steak was removed from the 13th rib of each carcass and immediately placed in simul...

Journal: :Acta odontologica latinoamericana : AOL 2009
Marcelo Coelho Goiato Rosse Mary Falcón-Antenucci Daniela Micheline dos Santos Eduardo Piza Pellizzer

The aim of this study was to evaluate the Shore A hardness and color stability of two soft lining materials after thermocycling and when chemical polishing was used or omitted. Two acrylic-based soft lining materials were tested: Coe-Soft and Soft Confort, 14 specimens were made for each material. They were distributed in four groups according to the treatment performed. The specimens were ther...

2012
D. A. King S. D. Shackelford

The present study was conducted to determine the repeatability of color stability measurements and to evaluate relationships among color stability data collected under differing sampling and aging protocols. Beef (Bos taurus) carcasses (n = 100) were selected at grading in a commercial facility, after which a LM steak was removed from the 13th rib of each carcass and immediately placed in simul...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم 1391

in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید