[Study on the accuracy of Co-Cr-Mo alloy removable partial denture framework fabricated by selective laser melting].

PURPOSE To evaluate the accuracy of Co-Cr-Mo alloy removable partial denture (RPD) frameworks, which were fabricated by selective laser melting(SLM) technology. METHODS 3Shape 3D optical scanner was used to scan a plaster model of maxillary Kennedy I dentition defect, and the obtained 3D topographical data were reconstructed into a digital model. Computer-aided design (CAD) of RPD framework was performed using 3shape design software. Five Co-Cr-Mo RPD frameworks were fabricated by SLM technology, then each framework was scanned to obtain 3D data and compared with the original CAD data, respectively, to evaluate the match accuracy. RESULTS The Co-Cr-Mo scaffolds were in good position on the plaster model, and the tissue surface was adhered to the plaster model without warping. The overall 3D deviation from the original model was (0.088±0.021) mm. CONCLUSIONS The Co-Cr-Mo framework fabricated by SLM technology in this experiment has less deviation and higher accuracy.