Recent results of the only large practice-based comparative clinical trial show the superior durability of zirconia, regardless of differences in material source, formulation and manufacturing methods. Unique characteristics of zirconia have allowed it to become a superstar among a variety of current-generation tooth-colored restorative materials. Rella Christensen, PhD, RDH, identifies those characteristics, shows how they appear in clinical service and reviews clinical results important to technicians and dentists.