BACKGROUND AND AIMS Despite the increasing demand for adhesive restorations in pediatric dentistry, polymerization shrinkage and subsequent marginal microleakage remains a problem. The aim of this study was to evaluate of the sealing ability of novel low-shrinkage composite silorane in class V cavity of primary canines in comparison with three types of composite resin. MATERIALS AND METHODS N...

OBJECTIVES The aim of the present study was to assess the effect of the exposure to food-simulating liquids prior to brushing simulation on the surface roughness of five composite materials (Quixfil, Filtek Supreme, Esthet-X, Filtek Z250, Tetric Ceram). MATERIAL AND METHODS Twenty cylinders (5 mm diameter and 4 mm height) of each composite were randomly allocated to 4 groups (n=5), according ...

OBJECTIVES This study aimed to evaluate the effects of chlorhexidine mouthrinses on color stability of nanofilled and micro-hybrid resin-based composites. MATERIALS AND METHODS In this in-vitro study, 160 disc-shaped specimens (7x2mm) were fabricated of Filtek Z250 and Filtek Z350XT Enamel (A2 shade). The samples of each group were randomly divided into eight subgroups (n=10). The specimens w...

Background and Aim: Composite placement poses many challenges, especially in the gingival floor with dentinal margins. Microleakage is one of the factors affecting the longevity of dental restorations. We aimed to compare the microleakage of cavities filled with bulk-fill composite at enamel and dentinal margins. Materials and Methods: In this experimental study, a total of 102 sound human pre...

The purpose of this study was to assess the effects water storage on surface microhardness (VHN) and fracture toughness (K1C) two self-adhesive restorative materials compared traditional resin composite resin-modified glass ionomer cement (RMGIC) materials. Methods: Two (Activa Vertise Flow), a nonflowable (Filtek Z250), an RMGIC (Fuji II) were evaluated. Hardness measurements (n = 12) recorded...

Introduction/Objective. The objective was to determine the degree of conversion (DC), cross-link density, percentage leachable monomers, flexural strength (FS), and hardness (HV) nanohybrid, nanofilled bulk-fill, giomer, fiber-reinforced, low-shrinkage composites. Methods. Standardized specimens (n = 5/group) Tetric EvoCeram Bulk Fill, Filtek Beautifil, EverX posterior, Kalore, Z250 (microhybri...

This study aimed to investigate the surface roughness and gloss of composite resins after using two polishing systems and toothbrushing. Six composite resins (Durafill VS, Filtek Z250, Filtek Z350 XT, Kalore, Venus Diamond, and Venus Pearl) were evaluated after polishing with two polishing systems (Sof-Lex, Venus Supra) and after toothbrushing up to 40,000 cycles. Surface roughness (Ra) and glo...

Aim: This study was fulfilled to evaluate the flexural strength, micro-hardness, and release of two fluoride ions bioactive restorative materials (Cention N Activa Bioactive), a resin modified glass ionomer (Fuji II LC), composite (Filtek z250). Methods: Forty samples from four (Activa Bioactive, Fuji LC, Cention N, Filtek Z250) were provided according current standards ISO 4049/2000 guide line...

Objectives: Treatment of chipped or fractured porcelain with composite resin is considered as an economic treatment for minor fractures in ceramics. The aim of this study was to evaluate the effect of different ceramic surface treatments on bond strength of methacrylate-based and silorane-based composite resin to IPS Empress 2. Methods: Sixty IPS Empress 2 ceramic discs were fabrica...