Clinical application of improved digital guide and occlusal guide in the precise localization for maxillary Le Fort I osteotomy

doi:10.12307/2021.210

Abstract

Abstract: BACKGROUND: Maxillary Le Fort I osteotomy is the most common method to correct the upper jaw deformity and abnormal position. Traditional model surgery is difficult to accurately implement the operation plan in the operation. In recent years, 3D-printed digital guides have been widely used in orthognathic surgery.
OBJECTIVE: To discuss the application efficacy of improved digital guide in the precise localization for maxillary Le Fort I osteotomy.
METHODS: Twenty patients with maxillary hypoplasia who underwent Le Fort I osteotomy were enrolled. All the patients underwent preoperative cranial-maxillofacial CT scanning, and the CT data were imported into Mimics 20.0 software to establish a digital model, and the surgical virtual design was carried out. At the same time, the digital osteotomy guide, repositioning guide and occlusal guide were designed and printed, and these three guides were combined to perform the maxillary osteotomy and repositioning. One week after the operation, the cranial-maxillofacial CT was reviewed and the design scheme was verified.
RESULTS AND CONCLUSION: The absolute value of the median distance deviation between the simulated maxillary position and the actual postoperative position was less than 1 mm. The absolute value of the median angle deviation in the occlusal plane was less than 1°. In the analysis of image fusion deviation, root mean square value was (0.789±0.275) mm, whose mean was less than 1 mm. These findings indicate that the combined application of digital guides in maxillary Le Fort I osteotomy is safe, convenient and accurate.

Key words: Key words: digital guide, maxillary, Le Fort I osteotomy, 3D printing, occlusal positioning

CLC Number:

Zheng Haiying, Guo Xiujuan, Hou Xueyang, Zhang Lei, Zhang Siqing, Li Hui, Hui Ruizong, Geng Haixia. Clinical application of improved digital guide and occlusal guide in the precise localization for maxillary Le Fort I osteotomy[J]. Chinese Journal of Tissue Engineering Research, 2021, 25(32): 5097-5102.

Figures/Tables 4

References

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