نتایج جستجو برای: filtek z250

تعداد نتایج: 903  

2014
R. Banu Ermis Derya Yildirim Gul Yildiz Ozlem Gormez

OBJECTIVE The aim of this study was to evaluate the radiopacity of different composite resins and compare the values to those of human enamel and dentine. MATERIALS AND METHODS Five specimens of each material with thicknesses of 2 mm were prepared and radiographed alongside aluminum step wedge and human enamel and dentin. Three occlusal radiographs for each material were taken and digitized u...

2010
Juliana Abdallah ATOUI Michelle Alexandra CHINELATTI Regina Guenka PALMA-DIBB Silmara Aparecida Milori CORONA

OBJECTIVE To assess microleakage in conservative class V cavities prepared with aluminum-oxide air abrasion or turbine and restored with self-etching or etch-and-rinse adhesive systems. MATERIALS AND METHODS Forty premolars were randomly assigned to 4 groups (I and II: air abrasion; III and IV: turbine) and class V cavities were prepared on the buccal surfaces. Conditioning approaches were: g...

Journal: :Operative dentistry 2013
A Catelan T Pollard Ak Bedran-Russo Ph Dos Santos Gmb Ambrosano Fhb Aguiar

SUMMARY The aim of this study was to assess the influence of light-curing time on the nanohardness (H) and reduced elastic modulus (Er) of components (underlying dentin, hybrid layer, adhesive, and composite) of methacrylate- and silorane-based restorations after 24 hours and six months of storage. Class II slot preparations were carried out in human molars (n=3) and restored with methacrylate ...

Journal: :Journal of applied oral science : revista FOB 2004
Andrea Nóbrega Cavalcanti Catarina Lavigne Céres Mendonça Fontes Paula Mathias

The purpose of the present study was to evaluate the microleakage at the composite-repair interface using different bonding systems. Composite resin specimens (Filtek Z250 - 3M-ESPE) were divided into five groups (n=20) according to the following bonding mechanism: C - control - etching with 35% phosphoric acid; SB1 - etching and application of one coat of Single Bond (3M-ESPE); SB2 - etching a...

2017
Ali Tayebi Farnoosh Fallahzadeh Marzieh Morsaghian

BACKGROUND This study aimed to assess the effect of surface preparation with sandblasting and diamond bur along with the use of three primers on shear bond strength (SBS) of metal brackets to aged composite. MATERIAL AND METHODS In this in vitro, experimental study, 60 Filtek Z250 composite discs were fabricated (10×2mm), immersed in distilled water for 24 hours and subjected to 5000 thermal ...

Journal: :Dental materials journal 2012
Evrim Eliguzeloglu Dalkilic Ozgür Genc Betül Ozcopur Sema Belli Gürcan Eskitascioglu Mutlu Ozcan

This study evaluated the effect of different amounts of dentin powder (DP) mixed in Clearfil SE Bond (CSB) or Single Bond (SB) on adhesion to dentin. Human third molars (n=96) were sectioned to expose the mid-coronal dentin and divided into eight experimental groups (n=12 per group), namely, Group 1: CSB, Group 2: CSB+1.5 mg DP, Group 3: CSB+3 mg DP, Group 4: CSB+4.5 mg DP, Group 5: SB, Group 6...

Journal: :Dental materials journal 2012
Cesar Penazzo Lepri Regina Guenka Palma-Dibb

This study evaluated the influence of beverages and brushing on the surface roughness(SR) and color change(∆E) of a composite resin.For this, 120-disks(10 mm×2 mm) of composite resin(Filtek-Z250) were prepared and polished. Initials SR(Ra-μm) and color(CIELab-system) were measured with rugosimeter and spectrophotometer; specimens were divided into four groups(red wine, soft drink, sugar cane sp...

2014
Meng Ding Sang-Wan Shin Min-Soo Kim Jae-Jun Ryu Jeong-Yol Lee

PURPOSE This study was aimed to evaluate effect of the desensitizing pretreatments on the micro-tensile bond strengths (µTBS) to eroded dentin and sound dentin. MATERIALS AND METHODS Forty-two extracted molars were prepared to form a flat dentin surface, and then they were divided into two groups. Group I was stored in distilled water while group II was subjected to a pH cycling. Each group w...

Journal: :The journal of contemporary dental practice 2006
Camila Silveira de Araújo Thiago Incerti da Silva Fabricio Aulo Ogliari Sonia Saeger Meireles Evandro Piva Flávio Fernando Demarco

AIM The aim of this study was to evaluate the microleakage of seven adhesive systems on two substrates (enamel and dentin). METHODS AND MATERIALS Class V cavities were performed in buccal and lingual surfaces of 56 bovine incisors. The cervical margin was located in dentin and the incisal margin in enamel. The specimens were randomly divided into seven groups (n=16), according to the adhesive...

2015
Rodrigo Galo Marta Maria Martins Giamatei Contente Daniel Galafassi Maria Cristina Borsatto

OBJECTIVES The purpose of this study was to determine the Young's modulus and the hardness of deciduous and permanent teeth following wear challenges using different dental materials. MATERIALS AND METHODS Wear challenges were performed against four dental materials: A resin-based fissure sealant (Fluoroshield(®)), a glass ionomer based fissure sealant (Vitremer(®)), and two microhybrid compo...

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