NuSmile offers the only complete zirconia crown system that avoids contamination of the crown to be cemented. Scientific research, specifically a study by Kern, et al, published in Dental Materials 24, 508 (2008), shows that saliva contamination adversely affected the bond strength of cement to zirconia, and that the contamination could not be easily removed by common cleaning procedures. NuSmile Try-In crowns ensure optimal cement retention to zirconia, save valuable chair-time and simplify the clinical procedure.