The extra class: Cercon ceram kiss. Choosing Cercon ceram kiss gives you a ceramic veneering material developed specifically for zirconia frameworks. When we developed this material, we integrated the fundamental principles represented by our conventional veneering ceramics, Duceragold Kiss and Duceram Kiss, which have met with the approval of large numbers of users. With Cercon ceram kiss, all DeguDent veneering ceramics can be processed in exactly the same manner.