What effect does heat treatment with Calset have on polymerization shrinkage?
Heat is used to accelerate the polymerization reaction. All composites shrink in the course of polymerization to a maximum based on their individual properties. Heat just gets the material to reach maximal polymerization with lower light levels and in less time. (See chart by Prof. Jeffrey W. Stansbury). These results by Trujillo and Stansbury were presented at the 2003 IADR meeting and will soon be published in “Dental Materials.
