Preliminary Construction and Verification of Mandibular Movement Interaction Module in Orthognathic Surgery Planning Software

doi:10.13701/j.cnki.kqyxyj.2024.10.005

Abstract

Abstract: Objective: To construct and apply a mandibular interaction module in the orthognathic surgery design software based on mandibular movement trajectory. Methods: Based on CCMF Plan orthognathic planning software, the space matrix algorithm was used to solve the mandibular motion trajectory data to achieve the restoration of mandibular motion. The patient's personalized mandibular rotation axis was fitted according to the distance importance sampling algorithm, and the position relationship between the rotation axis and the condyle was analyzed. The mandibular rotation axis was used to guide surgical planning to verify the accuracy of intraoperative condylar position realization. Results: A mandibular movement interaction module was developed, which could reproduce the patient's mandibular movement and guide the ramus rotation by the mandibular rotation axis. The error between the simulated mandible trajectory and the real trajectory was about 1 mm, and the root mean square value (RMS) of the mandible model at the same opening was about 0.3 mm. The angle deviation and distance deviation of the condyle were about 3° and 1.5 mm, respectively. Conclusion: The mandibular movement interactive module can accurately fit the mandibular rotation axis and restore the patient's personalized mandibular movement. The accuracy of condylar position after operation meets the clinical requirements.

Key words: orthognathic surgery, virtual surgical planning, skeletal class Ⅲ malocclusion, mandibular rotation axis, mandibular movement trajectory

CAI Andong, WANG Xiaoxia, WANG Tiejun, DU Pinggong, LIU Zhonghao. Preliminary Construction and Verification of Mandibular Movement Interaction Module in Orthognathic Surgery Planning Software[J]. Journal of Oral Science Research, 2024, 40(10): 873-877.

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