The effect of preheating on microhardness and flexural strength of bulk-fill resin composites: an in-vitro study.

Purpose: The objective of this study was to assess the impact of preheating on the microhardness and flexural strength of bulk-fill resin composites.

Materials And Methods: In this in vitro study, forty-two specimens were prepared of each composite, X-tra fil and Opus Bulk Fill, resulting in 84 disk-shaped specimens for microhardness testing and 84 bar-shaped specimens for flexural strength analysis. The specimens were divided into four groups as follows: Group 1: X-tra fil composite with preheating (at 68°C for 15 minutes), group 2: X-tra fil composite without preheating (at room temperature), group 3: Opus Bulk Fill composite with the same preheating method, group 4: Opus Bulk Fill composite without preheating.

The Effect of Dimethyl Sulfoxide on the Microtensile Bond Strength of Universal Adhesives to Dentin.

The goal of this investigation was to see how a dentin pretreatment with 5% DMSO affected the microtensile bond strength (μTBS) of universal adhesives. In terms of adhesive kind and etching procedure, 32 healthy third human molars were randomly separated into eight groups. Three universal adhesives with etch-and-rinse and self-etch strategies (G-Premio Bond: GPB.

Effect of Contamination of Resin Composite with Latex Gloves Containing Corn Powder on Shear Bond Strength to Bovine Dentin Using Two Types of Bonding Systems.

Unlabelled: Bacground and purpose: Today, the unwanted contamination of the composite surface with latex gloves during tooth restoration is one of the common problems in restorative dentistry. The present study was conducted with the aim of investigating the effect of resin composite contamination with latex gloves containing corn powder on the strength of the shear bond to bovine dentin during the fifth and seventh generations of the bonding system.

Materials And Methods: This case-control study was conducted on 90 cow teeth without caries or lesions.

Effect of repeated preheating on color stability of three types of composite resins and a giomer: An in vitro study.

Background: This study assessed the effect of repeated preheating of three types of composite resins and a giomer on their color stability.

Methods: In this in vitro study, 128 composite resin and giomer specimens with a 10-mm diameter and a 2-mm height were evaluated in eight groups (n=16) of Heliomolar microfilled, Brilliant Enamel microhybrid, and Tetric N-Ceram nanohybrid composite resins, and Beautifil II giomer used at room temperature and also after preheating of the tube in a water bath at 55‒60 °C for 40 times. After preparing the specimens, their color parameters were measured by a spectrophotometer.

Effect of at-home and in-office bleaching on microleakage of class V composite resin restorations using different types of universal adhesives: An in vitro study.

Background: When bleaching agents contact dental structures, they act on restorative materials and adhesive interfaces. This study investigated the effect of "at-home" and "in-office" bleaching on the microleakage of composite resin restorations performed with different universal adhesives in self-etch and etch-and-rinse modes.

Methods: Class V cavities were prepared in 132 premolars.