One-step and no-prep treatment of worn dentition using PICNs. A prospective clinical study

Computer-Aided Design and Manufacturing (CAD-CAM) composite materials offer new possibilities in terms of minimally invasive treatment strategies of worn dentition. Among those materials, Polymer Infiltrated Ceramic Network (PICN) materials, (Vita Enamic, Vita Zahnfabrik, Bad Sackingen, Germany) exhibit mechanical properties significantly superior to conventional composites1. Their ability to be milled in very low thickness allows to perform very thin bonded restorations without further elimination of tooth tissues (no-prep). Yet, the treatment is complex particularly with respect to the provisional restoration realization, which is intended to test and determine the new vertical dimension of occlusion (VDO). On the other hand, some authors have previously reported that VDO determination remains empirical and that it can be increased in one time up to 5mm (in the front zone) without engendering any adverse effects. Therefore, the objective of the present study is to evaluate a new treatment approach of worn dentition using PICNs, entitled “One step-No prep”