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[Study on the accuracy of Co-Cr-Mo alloy removable partial denture framework fabricated by selective laser melting]
Hong-Zhen Xu1, Zhi-Cheng Gong, Qun Zhong
1Shanghai Stomatological Hospital. Shanghai 200031, China.
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.
