Abstract
The effect of tooth surface treatment and its mechanism was examined to obtain improved adhesion of restorative resin. From the fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and adhesive strength studies with respect to collagen and acid-etched dentin, treated with aqueous solution of 2-hydroxyethyl methacrylate (HEMA), the following results were obtained. Water was an essential component in respect to the adsorption of HEMA to collagen fiber. Substantial amounts of HEMA were adsorbed by collagen fiber when the concentration range of HEMA in aqueous solution was 6〜60wt%. Following treatment with HEMA, it was apparent from SEM observation that collagen fibers were stiffened and maintained a fibrous network. In regard to tensile bond strength of a composite resin to dentin, 12.07, 10.9 and 7.04 MPa was obtained with phosphoric acid-30% HEMA, citric acid-30% HEMA and EDTA-30% HEMA aqueous solution, respectively.
