ABSTRACT
Aim: To assess the effect of CAD-CAM fabrication on the clinical fit accuracy of removable partial denture (RPD)’s metal frameworks. Methods: Eight patients were selected to participate in this study and twelve RPD were planned. For each RPD (n=12) two Cobalt-Chromium frameworks were produced with two alternative protocols: CAD-CAM protocol (experimental group); and conventional lost-wax casting technique (control group). Clinical fit accuracy was assessed by direct evaluation of the gap between the framework clasp assemblies and their dental supports using an endodontic plugger; and by indirect evaluation of the gap between the oclusal rests and their dental seats through a silicone mold that was further digitized and analyzed by micro-CT. Data were analyzed with Wilcoxon and paired t-tests (α= 0.05). Results: No statistically significant (p>0.05) differences were found between groups, either with direct or indirect evaluation. Conclusions: CAD-CAM technology is a viable method for fabrication of RPD’s metal frameworks.
