[Clinical application and accuracy of the genioplasty surgical templates system for osseous genioplasty].

Objective: To develop and validate a new genioplasty templates system for monoblock osseous genioplasty. Methods: Thirty-six patients with chin deformities were enrolled in this study. The chin template system included a cutting guide and a repositioning guide for a genioplasty. Chin templates were designed in a computer and fabricated using a three-dimensional printing technique. The accuracy of the genioplasty templates were assessed by comparing the actual postoperative outcomes with the virtual plan. Results: All genioplasty was successfully completed by the template system. The largest linear root-mean-square deviation(RMSD) between the planned and the postoperative chin segments was 1.16 mm and the largest angular RMSD was 3.06°. Conclusions: The results showed that the chin template system provides a reliable method for transfer of genioplasty planning. The operation precision of the genioplasty can be improved by using the surgical templates system.