Laser-textured surfaces on the adhesion of composite to dentin
Volume 27, Issue 10 , Pages 1038-1044, October 2011
ObjectiveTo assess the influence of laser-textured surfaces on the adhesion of composite to dentin after being rotary prepared.
Thirty healthy teeth were kept in 0.1% thymol solution prior to being ground down to dentin to create a 4×4mm2 flat surface. Teeth were divided into 3 groups (n=10). Groups 1 and 2 utilized the prototype Erbium doped, Yttrium–Aluminum–Garnet Er:YAG laser by Dental Photonics, Inc. A single pulse was delivered to each spot to create an equally spaced square 4×4mm2 matrix of micro craters. All craters had 100μm diameter/45μm depth; two different spacing patterns were prepared in Groups 1 and 2. In Group 1, distance between crater centers was 50μm; Group 2 had 100μm. In Group 3 (control), 10 samples were prepared without laser texturing. G-bond (GC America) was applied to testing area of all samples in all groups according to manufacturer's instructions. Bonding resin was applied and shear-bond strength tests were employed using an Instron machine to measure adhesive strength.