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Updated: Jun 11, 2025
Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach
Published on: August 24, 2018
In-house CAD/CAM fabricated repositioning guide in maxillary repositioning after Le Fort I osteotomy
Jin-Yong Cho1, Jaeyoung Ryu2, Seunggon Jung2
1Department of Oral & Maxillofacial Surgery, Gachon University Gil Medical Center, Incheon, Republic of Korea; Department of Dentistry, School of Medicine, Gachon University, Incheon, Republic of Korea.
Objective:
This study aimed to compare the accuracy of two transferring methods, which are the intermediate splint made by computer-aided design (CAD)/computer-aided manufacturing (CAM) and the customized maxillary repositioning guide for orthognathic surgery.
Materials And Methods:
Patient data regarding virtual surgical simulations were collected. For analyzing the accuracy, the postoperative cone-beam computed tomography and preoperative simulation data were superimposed. The x, y, and z coordinates were obtained at three landmarks in the maxillary dentition, and the linear and angular differences between the surgical simulation and the actual surgery were evaluated.
Results:
Thirty-three patients were included in this study, 16 in the splint group and 17 in the guide group. One coordinate in the guide group and nine in the splint group showed errors of >2 mm, with a statistically significant difference. There was no significant difference between the two groups in the three-dimensional error distance at each reference point. In most measurements, the interquartile range of the guide group showed a narrower distribution than that of the splint group.
Conclusion:
It is more advantageous to use a customized maxillary repositioning guide than an intermediate splint made via CAD/CAM to obtain an accuracy within the 2 mm discrepancy range.
