Removable partial denture - Accuracy in digital workflow

Abstract

This study aimed to compare the fit and accuracy of metal frameworks for removable partial dentures (RPDs) made with conventional and digital fabrication techniques. On a representative model, maxillary RPD metal frameworks (N=5, n=2 each group) were created. A conventional casting of milled RPD patterns (C-M), and a conventional casting of printed RPD patterns (C-P), were all used to create RPDs. By creating replicas with silicone registration material and measuring under a digital microscope, the fit accuracy of RPD frameworks was examined.For the accuracy measurements (m), a total of 11 sites and 29 areas in the RPD metal frameworks were taken into account. Wilcoxon signed rank and the Friedman test were used in the statistical analysis of the data (p 0.05). Prior to finishing and polishing, the fit accuracy of the C-M approach (118 m) was significantly superior (P .001) when compared to other techniques. After finishing and polishing, the C-M approach demonstrated comparable fit accuracy to the C-P. When RPD precision is taken into account, it was observed that digital techniques were efficient and clinically acceptable.