Tensile bond strengths of dentin bonding agents to dentin.

Abstract

Several dentin bonding agents have recently become commercially available. The purpose of this study was to determine the tensile bond strengths of 4 dentin bonding agents to dentin. Seventy-two maxillary permanent central incisors were mounted in tooth cups and the facial surfaces ground on 600 grit SiC to expose the underlying dentin. The tensile bond strengths were determined by a test method developed by Kemper and Kilian (1976) . The following systems were evaluated: Scotchbond to untreated dentin, P 10 (A); Scotchbond to dentin etched with H 3 PO 4 , P 10 (B); Scotchbond to dentin conditioned with citric acid, P 10 (C); J. & J. Dentin Bonding Agent to dentin, Adaptic (D); Creation Bonding System to dentin treated with Den-Mat Cavity Cleanser, Spectrabond (E); Dentin-Adhesit System to dentin treated with Vivadent Dentin Conditioner, Isopast (F). Twelve test specimens were prepared in random order with each procedure. The tensile bond strengths were determined in an Instron machine and expressed in MN.m −2 . The data were analyzed by a one-way analysis of variance and by Duncan's multiple range test at the 5% level of significance. The tensile bond strengths were significantly different (P=0.0001). The tensile bond strengths (MN.m −2 ) in descending order of magnitude were: D=3.0; B=0.9; F=0.1; A=0.1; C=0.04; E=0. The tensile bond strength obtained with procedure D (J. & J. Dentin Bonding Agent, Adaptic) was significantly greater than those obtained with the other procedures. The tensile bond strengths of the other systems were not significantly different.