Nanomechanical properties of biochemically modified dentin bonded interfaces

Author(s)

dos Santos, P. H. ^{[1, 2]} ; Karol, S. ^[3] ; Bedran-Russo, A. K. B. ^[1]

Affiliation

^[1] Univ Illinois, Coll Dent, Dept Restorat Dent, Chicago, IL - USA

^[2] Sao Paulo State Univ UNESP, Aracatuba Sch Dent, Dept Dent Mat & Prosthodont, BR-16015050 Aracatuba, SP - Brazil

^[3] Univ Illinois, Coll Engn, Dept Bioengn, Chicago, IL - USA

• Document type: Journal article
• Source: Journal of Oral Rehabilitation; v. 38, n. 7, p. 541-546, JUL 2011.
• Web of Science Citations: 19

Abstract

P>The effect of biomodification of dentin matrices using collagen cross-linkers, glutaraldehyde (GD) and grape seed extract (GSE), on the reduced modulus of elasticity (Er) and nanohardness (H) of the hybrid layer and underlying dentin was investigated at the dentin-resin bonded interface. The coronal dentin of nine molars were exposed and divided into groups: 5% GD, 6 center dot 5% GSE and control. Control samples were etched, bonded with Adper Single Bond Plus and Premise composite. GD and GSE were applied for 1 h prior to bonding procedures. After 24 h, samples were sectioned, and resin-dentin beams were either kept in distilled water or exposed to collagenase treatment for 24 h. Nano-indentations were performed at the hybrid layer and underlying dentin. GD and GSE treatment increased the Er and H of resin-dentin interface structures when compared to the control group (P < 0 center dot 05), particularly the hybrid layer, and may be a promising novel approach to strengthen the dentin-resin bonded interface structures when using these adhesive system and resin-based composite. (AU)

• FAPESP's process: 08/03213-7 - Effect of colagen cross-linkers in the adhesive interfaces: evaluation of mechanical nanoproperties
• Grantee: Paulo Henrique dos Santos
• Support Opportunities: Scholarships abroad - New Frontiers