Influence of cavity wall thickness on the color adjustment potential of single-shade resin composites.

Background: The color adjustment potential of resin composites depends on the specific characteristics of the surrounding structures. The authors evaluated the influence of cavity wall thickness on CIEDE2000 color adjustment potential (CAP) of single-shade composites using the CIEDE2000 color difference (ΔE) formula.

Methods: Two types of specimens were produced: single, using Vittra APS color DA3 (FGM Dental), Vittra APS Unique (VU) (FGM Dental), and Omnichroma (Tokuyama Dental) composites; and dual, using Vittra APS color DA3, but with cavity wall thicknesses of 3, 2, or 1 mm, restored with VU or Omnichroma.

Clinical and thermographic evaluation after lower third molar extractions and the application of different photobiomodulation protocols: double-blind randomised clinical trial.

Objectives: to compare the parameters of pain, oedema, temperature, and soft tissue closure in dental sockets that received two different photobiomodulation (PBM) protocols following extractions.

Materials And Methods: Thirty-one participants had their teeth 38 and 48 extracted. Subsequently, one of the dental sockets received PBM at a wavelength (WL) of 808 nanometers (808 group- nm) and the other dental socket received the PBM at WLs of 808 nm and 660 nm, simultaneously (808 + 660 group).

The effect of preheating and opacity on the sorption and solubility of a composite resin.

This study evaluated the influence of material opacity and preheating on the sorption and solubility of a composite resin material. A commercially available composite resin and an 8 × 2-mm circular metallic matrix were used to fabricate a total of 60 specimens in 6 shades, of which 3 had conventional opacity (CA2, CA3, and CA3.5) and 3 were opaque (OA2, OA3, and OA3.

Pre-heating mitigates composite degradation.

Dental composites cured at high temperatures show improved properties and higher degrees of conversion; however, there is no information available about the effect of pre-heating on material degradation. Objectives This study evaluated the effect of pre-heating on the degradation of composites, based on the analysis of radiopacity and silver penetration using scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS). Material and Methods Thirty specimens were fabricated using a metallic matrix (2x8 mm) and the composites Durafill VS (Heraeus Kulzer), Z-250 (3M/ESPE), and Z-350 (3M/ESPE), cured at 25°C (no pre-heating) or 60°C (pre-heating).

Temperature and curing time affect composite sorption and solubility.

Objective: This study evaluated the effect of temperature and curing time on composite sorption and solubility.

Material And Methods: Seventy five specimens (8×2 mm) were prepared using a commercial composite resin (ICE, SDI). Three temperatures (10°C, 25°C and 60°C) and five curing times (5 s, 10 s, 20 s, 40 s and 60 s) were evaluated.

Shortening of primary dentin etching time and its implication on bond strength.

Objective: The aim of this study was to investigate the influence of shortening the etching time on the bond strength of a conventional and a self-etching primer adhesive system used in primary tooth dentin.

Methods: Flat dentin surfaces were obtained from 24 primary molars, randomly assigned to 4 experimental groups. The adhesive systems Single Bond and Clearfil SE Bond were applied in two groups according to the manufacturers' recommendations.

Effect of 2% chlorhexidine on microtensile bond strength of composite to dentin.

Purpose: To evaluate the effect of 2% chlorhexidine on the microtensile bond strength of composite resin to dentin treated with three dentin bonding systems.

Materials And Methods: Flat dentinal surfaces were prepared in 24 extracted human third molars. Teeth were randomly divided into 8 distinct experimental groups according to the adhesive applied (Prime & Bond NT, Single Bond and Clearfil SE Bond), the application (yes/no) of chlorhexidine, and the time point at which it was applied (before or after acid etching the dentin).