Accuracy of 3D printing individual titanium plates for maxillary repositioning in orthognathic surgery

Abstract

Abstract: PURPOSE: To develop and validate the technique of using individual titanium plates for maxilla in orthognathic surgery. The individual titanium plates were designed in the computer and fabricated using 3D printing technique. METHODS: Eight patients with dental maxillofacial deformities were enrolled. Surgeries were planned with computer-aided surgical simulation planning method. Osteotomy guides and individual titanium plates were used in this technique to separately guide the osteotomy and repositioning for the maxilla during operation without surgical splints. The outcome evaluation was completed by comparing planned outcomes with postoperative results of all patients enrolled. The outcome measurements were the linear and angular differences for the maxilla when the planned and postoperative computed tomography models were registered at the cranium. Statistical analysis was performed, and the accuracy was reported using root mean square deviation (RMSD) with SPSS 13.0 software package. RESULTS: All surgeries were successfully completed using the technique of individual titanium plate. The preliminary results showed no significant difference for maxilla reposition. The largest RMSDs were 0.64 mm and 1.65° for the maxilla, and 0.32 mm for upper dental midline in mediolateral direction. CONCLUSIONS: The results showed that individual titanium plates could provide a reliable method for transfer of orthognathic surgery planning.

Key words: Orthognathic surgery, Computer assisted design, 3D printing, Reposition, Accuracy

CLC Number:

R782.2

LI Biao, JIANG Teng-fei, CAI Ming, SHEN Shun-yao, JIANG WEN-bo, SHEN Guo-fang, WANG Xu-dong. Accuracy of 3D printing individual titanium plates for maxillary repositioning in orthognathic surgery[J]. China Journal of Oral and Maxillofacial Surgery, 2016, 14(5): 419-424.

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