Development of a low-color, color stable, dual cure dental resin.

Unlabelled: Dual-cure (DC) resins are mainly used as cements due to high initial color (generally yellow) and large color shift (ΔE*) after polymerization as compared to light-cured resins. However, even as cements, this color shift is clinically unacceptable, especially when used to cement thin veneers.

Objective: To develop a novel DC initiator system with both lower initial color (less yellow, i.

Revisiting the intensity output of curing lights in private dental offices.

In a survey published in 1994, it was reported that nearly 30% of dental office curing lights had an intensity output (power density) of < 200 mW/cm2. This study was designed to examine the types of curing lights and the adequacy of the intensity output in the same localities after 10 years. A total of 161 curing lights in 65 dental offices located in 2 metropolitan areas in Texas were examined for the following variables: types of light, power density, resin build-up on the tips, and size of the tips.

A new surface sealant for polishing composite resin restorations.

Achieving a smooth and lustrous surface in a timely fashion, using fewer steps, is a desirable feature for direct esthetic restorations. Eliminating the oxygen-inhibition layer and converting it to a glaze layer removes any need for further polishing. This is more applicable to small restorations where reshaping and recontouring can be achieved before light-curing.

LED and halogen lights: effect of ceramic thickness and shade on curing luting resin.

The purpose of this study was to measure and compare the hardness of a light-cured luting resin cured under different shades and thicknesses of porcelain with a halogen and a light-emitting diode (LED) light. Square (11 mm x 11 mm) specimens of a commercially available porcelain with thicknesses of 1 mm and 2 mm were fabricated. Two shades of porcelain--A1 representing a high-value, low-chroma porcelain and C4 representing a low-value, high-chroma porcelain--were used to fabricate specimens.

Clinical evaluation of etched porcelain onlays: a 4-year report.

Etched porcelain-bonded-to-enamel restorations (porcelain veneers) have demonstrated a low incidence of debonding, fracture, microleakage, and discoloration. In addition, laboratory and short-term clinical studies have shown satisfactory results with posterior etched porcelain-bonded restorations. This study evaluated the 4-year clinical performance of posterior all-ceramic onlays and overlays bonded with a dual-cure luting resin and a self-cure acetone-based dentinal adhesive.