By Thomas D. Larson, D.D.S., M.S.D. From the January-February Issue of Northwest Dentistry Polymerization shrinkage of methacrylate composites utilizing bisphenol-A glycidal methacrylate or urethane dimethacrylate has typically been about 3-3.5% by volume. Though adjustments have been made to filler loading, filler size, filler particle distribution, and improved silanization, the polymerization contraction still creates some significant clinical […] Read More »