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...

UNLABELLED Cell culture system has been used to evaluate alloy cytotoxicity under different environments, testing the extracts, but the effect of temperature variation on the cytotoxicity of dental alloys has not been analyzed. OBJECTIVE The aim of the present study was to investigate if temperature variation could affect dental alloy cytotoxicity, testing alloy extracts in an epithelial cell...

BACKGROUND Low viscosity resin infiltration of initial caries lesions is a modern microinvasive method to treat initial cries lesions. However, only scarce information is available about the long-term surface alterations of infiltrated lesions. METHODS Twenty-eight premolar teeth exhibiting non-cavitated initial caries lesions (International Caries Detection and Assessment System (ICDAS code ...

Alloys of the quasibinary TiNi-TiCu system manufactured by melt quenching in form thin 20–50 μm ribbons have proven to show good potential as materials for fabrication micromechanical devices. At high cooling rates (about 106 K/s), this method allows producing high-copper (more than 20 at.%) amorphous alloys which exhibit an excellent shape-memory effect after crystallization. Their properties ...

INTRODUCTION The open-sandwich technique was proposed to solve the problem of cervical micro-leakage of deep Class II composite restorations by making use of the self-adhesive nature of the glass-ionomers. Recent advances in the properties of this family of materials may continue to make the technique relevant today. AIMS AND OBJECTIVES The aim of this in vitro study was to determine the effe...

OBJECTIVES The aim of this study was to evaluate and compare the retentive strength of orthodontic bands cemented with amorphous calcium phosphate (ACP)-containing and conventional glass ionomer cements (GICs). MATERIALS AND METHODS One-hundred-and-twenty mandibular third molars were embedded in acrylic resin blocks with the buccal surface of crowns perpendicular to the base of the mold. The ...

UNLABELLED Indirect resin composites are generally regarded to have better color stability than direct resin composites since they possess higher conversion degree. OBJECTIVE The present study aimed at comparing the changes in color (ΔE) and color coordinates (ΔL, Δa and Δb) of one direct (Estelite Sigma: 16 shades) and 2 indirect resin composites (BelleGlass NG: 16 shades; Sinfony: 26 shades...

This study examined the effect of alumina air-abrasion with different pressure on bonding between an acrylic resin and casting alloys. Disk specimens (8 and 10 mm in diameter) were cast from a silver-palladium-copper-gold (Ag-Pd-Cu-Au, Castwell M.C.12) alloy and a titanium-aluminum-niobium alloy (Ti-6Al-7Nb, T-Alloy Tough). The disks were air-abraded with alumina particles (50-70 microm) under ...

Background: To evaluate the mechanical and surface properties of two glass ionomer restorative systems (EQUIA Fil, Ionostar Molar) a resin composite (Charisma Classic ) after thermocycling. Methods: Twenty disk-shaped samples were prepared from each material in teflon molds according to manufacturer’s instructions. After stored distilled water at 37 0C for 24 h, microhardness roughness measurem...

Abstract Statement of problem: Addition zirconium oxide nanofillers to PMMA had improved the mechanical properties heat polymerized acrylic resin, but it’s effect on bond strength teeth hadn’t been evaluated yet. Purpose: The purpose study was evaluate Zirconium (ZrO2) powder with different concentrations (1.5%, 3%, 5%) resin denture base before and after thermocycling. Material methods: nanopa...