Accuracy Test and Preliminary Application of Mandibular Motion Simulation Based on Intraoral Scanning Registration

doi:10.13701/j.cnki.kqyxyj.2021.11.013

Abstract

Abstract: Objective: To verify the accuracy of mandibular motion simulation method based on intraoral scanning registration, and apply it in patients after preliminary mandibular reconstruction. Methods: Mandibular movement was recorded by jaw tracking system and the trajectory was registered with CT through oral scanning to simulate the mandibular movement. Titanium screws were screwed into the skull models’ upper and lower jaws respectively. The distances between the titanium screws in the actual condition, through CT image, and through simulation were measured and compared. 12 patients after mandibular reconstruction and 5 normal volunteers were included. Results: The overall error of motion simulation was (0.61±0.05) mm, and the 95% confidence interval was (0.51, 0.71) mm. The outward movement of condyle on the affected side of the patients (2.70±0.62) mm were greater than that of the normal group [(1.23±0.26) mm, P<0.05], and the inward movement of condyle on the healthy side [(2.91±0.63) mm] was also greater than that of the normal group [(1.59±0.28) mm, P<0.05]. Conclusion: The accuracy of the mandibular motion simulation method based on intraoral scanning was verified. It could be used to measure and evaluate the condylar movement after mandibular reconstruction.

Key words: virtual reality, mandibular reconstruction, mandibular condyle, joint range of motion

CHEN Junpeng, WANG Jing, LV Liefu, WANG Yang, MAO Chi, CHEN Kenan, YUAN Ruoshui, XU Xiangliang, WANG Diancan, GUO Yuxing, SU Jiazeng, GUO Chuanbin. Accuracy Test and Preliminary Application of Mandibular Motion Simulation Based on Intraoral Scanning Registration[J]. Journal of Oral Science Research, 2021, 37(11): 1023-1028.

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