The accuracy of three-dimensional rapid prototyped surgical template guided anterior segmental osteotomy

ABSTRACT

Background: Surgical guiding templates provided a reliable way to transfer the simulation to the actual operation. However, there was no template designed for anterior segmental osteotomy so far. The study aimed to introduce and evaluate a set of 3D rapid prototyping surgical templates used in anterior segmental osteotomy. Material and methods: From August 2015 to August 2017, 17 patients with bimaxillary protrusions were recruited and occlusal-based multi-sectional templates were applied in the surgeries. The cephalometric analysis and 3D superimposition were performed to evaluate the differences between the simulations and actual post-operative out-comes. The patients were followed-up for 12 months to evaluate the incidence rate of complications and relapse. Results: Bimaxillary protrusion was corrected in all patients with no complication. In radiographic evaluations, there was no statistically significant difference between the actual operations and the computer-aided 3D simulations (p > 0.05, the mean linear and angular differences were less than 1.32mm and 1.72° consequently, and 3D superimposition difference was less than 1.4mm). The Pearson intraclass correlation coefficient reliabilities were high (0.897), and the correlations were highly significant (P < 0.001).Conclusions: The 3D printed surgical template designed in this study can safely and accurately transfer the computer-aided 3D simulation into real practice

RESUMEN

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