The study of single filling for sandwich technique.

Abstract

The purpose of this investigation was to evaluate the new sandwich technique ”Single Filling”. This method is a modified sandwich technique to apply the composite resin directly onto noncured glass ionomer cement without an etching procedure. The tensile bond strength between the glass ionomer cement and the composite resin was measured using an Instron test machine to compare single filling with a conventional sandwich technique. The tensile bond strength by single filling was lower than that by a conventional sandwich technique but there was no significant difference between single filling and the conventional sandwich technique. The tensile bond strength between the glass ionomer cement and composite resin was greater than the cohesive strength of the glass ionomer cement.