Influence of the Solubility Parameter of Intermediary Resin on the Effectiveness of the Gluma Bonding System

Abstract

The aim of the present study was to investigate the effect of the solubility parameter of the intermediary resin in the Gluma system on the bonding to dentin. The solubility parameter of the resins was varied between 18.8 x 103 and 21.1 x 103 J^1/2/m ^3/2 by varying the composition of the resin. The efficacy of the bonding system was determined by measurements of marginal gaps formed by polymerization contraction of a restorative resin in dentin cavities treated with the bonding system. The bonding system had maximum efficacy at a solubility parameter of the intermediary resin of 8 = 20.0 x 103 J^1/2/m^3/2. This finding corroborates a concept of bonding to dentin that involves a mechanical interlocking by interpenetrating resins.