Nanoparticle loading level and properties of experimental hybrid resin luting agents.

Purpose: This study investigated the influence of nanoparticle loading level on properties of experimental hybrid resin luting agents.

Materials And Methods: Silanated 2-μm barium borosilicate glass microparticles and 7-nm silica nanoparticles were used. Five materials were obtained by loading a photocurable Bis-GMA/TEGDMA co-monomer with a total mass fraction of 60% inorganic fillers.

Fracture resistance of premolars restored with inlay and onlay ceramic restorations and luted with two different agents.

Purpose: The purpose of this study was to evaluate the fracture resistance of human maxillary premolars restored with 2 ceramic systems (Vitadur Alpha and In Ceram) comparing 3 preparation designs and 2 luting agents.

Methods: Seventy sound teeth were prepared to receive ceramic restorations (Vitadur Alpha; n=14) as follows: (1) control, sound premolars, with no preparation, (2) inlays, (3) partial onlays (palatal cuspid coverage), (4) total onlays (both cuspids coverage), and (5) total onlays with an In Ceram core. The ceramic restorations were cemented using Enforce or RelyX ARC (half restorations with each cement), placed into the cavity and held under pressure, except for the control group.

Tensile bond strength and flexural modulus of resin cements--influence on the fracture resistance of teeth restored with ceramic inlays.

Purpose: This in vitro study tested tensile bond strength to enamel and dentin and the flexural modulus of three resin cements. It also determined the influence of these properties on the fracture resistance of teeth restored with ceramic inlays.

Materials And Methods: Initially, 10 standard ceramic discs were bonded to enamel using the following resin cements: Enforce (E), RelyX ARC (RX) and Fill Magic Dual Cement (FM).

Fracture resistance of premolars restored with partial ceramic restorations and submitted to two different loading stresses.

This in vitro study evaluated the fracture resistance of teeth restored with different designs of partial ceramic restorations using two diameters of steel ball to apply fracture stresses. One hundred and twenty sound maxillary premolars were randomly divided into three groups of 40 elements; each group was submitted to one of three indirect restoration designs: inlay, onlay with only lingual cuspal coverage and onlay with buccal and palatal cuspal coverage. Another 20 intact teeth were randomly assigned as control groups.