Semi-Split Bulk Filling Technique In Large Occlusal Bulk-Fill Resin Composite Restorations

Abstract

When composite resin hardens by light curing, it shrinks and undergoes deformation which occurs in one region more than other regions within the composite bulk. This behavior is mainly related to variations in bonding to enamel and dentin of surrounding cavity walls. Bonding to surrounding cavity walls creates restrained shrinkage which develops tensile stresses within the composite bulk. The developed tensile stresses act against the tensile strength of the composite resin