Three-dimensional reconstruction and comparison of temporomandibular joint space before and after orthognathic surgery

doi:10.19438/j.cjoms.2020.04.011

Abstract

Abstract: PURPOSE: Imaging examination of temporomandibular joint(TMJ) space is an important index for the evaluation of temporomandibular joint diseases(TMD). A new method was used to reconstruct three-dimensional(3D) structure of the temporomandibular joint(TMJ) space and compare the volumes before and after orthognathic surgery, in order to provide a reference for functional evaluation of TMJ after orthognathic surgery. METHODS: The CT imaging data of 20 skeletal Class Ⅲ patients who underwent orthognathic surgery were collected and analyzed by Mimics software that was used to reconstruct and calculate the volume of TMJ space, SPSS 22.0 software package was used for statistical analysis. RESULTS: After surgery, the volume of TMJ space increased in both sides, but only the volume of right side and total TMJ space were statistically significant (P<0.05). By linear regression analysis, bilateral joint volume was positively correlated before and after surgery (r=0.54, P=0.014 before surgery; r=0.59, P=0.006 after surgery), and there was no significant difference between genders. CONCLUSIONS: This study proposed a new method to display the 3D structure of TMJ space. By comparison of the volume of TMJ space before and after orthognathic surgery, it was found that the condyle had not been restored to its original position 6 months after surgery.

Key words: TMJ space, Orthognathic surgery, Volume

CLC Number:

R782.2

SUN Hong, ZHAO Jin-long, HE Li-sheng. Three-dimensional reconstruction and comparison of temporomandibular joint space before and after orthognathic surgery[J]. China Journal of Oral and Maxillofacial Surgery, 2020, 18(4): 343-347.

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