Effect of elastic gradients on the fracture resistance of tri-layer restorative systems.

Objectives: To assess the impact of elastic gradients formed among restorative material, cement, and substrate on the fracture resistance of tri-layer restorative systems.

Methods: Four CAD/CAM materials were utilized, two glass-ceramics (IPS e.max CAD, Vita Suprinity) and two resin-ceramic hybrids (Vita Enamic, Lava Ultimate).

Stress distribution on teeth restored with veneers using various incisal preparation designs: A 3D finite element analysis study.

Statement Of Problem: The type of veneer preparation is often chosen according to the patient's tooth structure and occlusion. Taking biomechanics into account in this decision-making process provides the clinician with more technical information on how to improve the clinical longevity of restorations. However, biomechanical analyses of veneer preparation designs are sparse.

Influence of Different Surface Finishing Protocols on the Wear Behavior of Lithium Disilicate Glass-Ceramics.

Purpose: To evaluate the effect of different finishing protocols on the wear behavior of lithium disilicate glass-ceramics (LD).

Materials And Methods: Specimens were produced from LD prefabricated CAD/CAM blocks and divided into three groups according to the surface treatment (n = 8): control, polishing, and glaze. Ceramic specimens were subjected to wear testing using a dual-axis chewing simulator.

Effect of the type of resin cement on the fracture resistance of chairside CAD-CAM materials after aging.

Purpose: The study objective was to evaluate the influence of the type of resin cement on the flexural strength and load to fracture of two chairside CAD-CAM materials after aging.

Materials And Methods: A polymer-infiltrated ceramic network (PICN) and a nanoceramic resin (RNC) were used to produce the specimens. Two types of dual-cure resin cements, a self-adhesive and a universal, were investigated.

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 piston material on the fatigue behavior of a glass-ceramic.

Statement Of Problem: The lack of standardization regarding the loading piston material used in fatigue tests could limit the interpretation of study findings.

Purpose: The purpose of this in vitro study was to evaluate the effect of the piston material on the fatigue behavior of a lithium disilicate glass-ceramic.

Material And Methods: Plate-shaped, 1.

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).

How oral environment simulation affects ceramic failure behavior.

Statement Of Problem: Investigating the mechanical behavior of ceramics in a clinically simulated scenario contributes to the development of new and tougher materials, improving the clinical performance of restorations. The optimal in vitro environment for testing is unclear.

Purpose: The purpose of this in vitro study was to investigate the failure behavior of a leucite-reinforced glass-ceramic under compression loading and fatigue in different simulated oral environment conditions.