Fatigue-life and stress distribution of a glass-ceramic under different loading conditions.

This study aimed to evaluate the effect of different loading conditions on the mechanical behavior and stress distribution of a leucite-reinforced glass-ceramic. Plate-shaped ceramic specimens were obtained from leucite-reinforced glass-ceramic (1.5 × 8.

Influence of background color on color perception in dentistry.

Objective: To evaluate the influence of neutral color backgrounds on the perception of color differences in dentistry.

Methods: A software was developed for this study that calculated the perceptibility (PT) and acceptability (AT) thresholds of color differences between a pair of computer-simulated incisor samples (n = 60 pairs) over three neutral color (white, gray and black) backgrounds. CIELAB and CIEDE2000 color difference formulas were used.

How does the piston material affect the in vitro mechanical behavior of dental ceramics?

Statement Of Problem: Variables involving the indication, manufacturing, and clinical use of ceramic restorations make the standardization of in vitro studies a challenge and raise questions as to the clinical validity of the resulting data.

Purpose: The purpose of this in vitro study was to assess the effect of piston material on the fracture behavior of ceramics tested under compressive load.

Material And Methods: Two ceramics were evaluated: a lithium disilicate-based glass-ceramic (D) and a feldspathic porcelain (P).