Effect of TMJ disc position on condylar bone remodeling after arthroscopic disc repositioning surgery

Liangchen Tang; Xiaofeng Bai; Yujie Wang; Yifan Chen; Min-Er Chen; Chenlong Xia; Zhiyong Li

doi:10.1016/j.ejrad.2023.111189

Effect of TMJ disc position on condylar bone remodeling after arthroscopic disc repositioning surgery

Eur J Radiol. 2023 Dec:169:111189. doi: 10.1016/j.ejrad.2023.111189. Epub 2023 Nov 4.

Authors

Liangchen Tang¹, Xiaofeng Bai¹, Yujie Wang¹, Yifan Chen¹, Min-Er Chen¹, Chenlong Xia¹, Zhiyong Li²

Affiliations

¹ Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China.
² Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, Zhejiang, China. Electronic address: hxlzy2002@zju.edu.cn.

PMID: 37939605
DOI: 10.1016/j.ejrad.2023.111189

Abstract

Purpose: The objective of this study was to analyze the effect of TMJ disc position on condylar bone remodeling after arthroscopic disc repositioning surgery.

Methods: Nine patients with anterior disc displacement without reduction (ADDWoR, 15 sides) who underwent arthroscopic disc repositioning surgery were included. Three-dimensional (3D) reconstruction of the articular disc and the condyle in the closed-mouth position was performed using cone-beam computed tomography (CBCT) and magnetic resonance imaging (MRI) data. Then, the CBCT and MRI images were fused and displayed together by multimodal image registration techniques. Morphological changes in the articular disc and condyle, as well as changes in their spatial relationship, were studied by comparing preoperative and 3-month postoperative CBCT-MRI fused images.

Results: The volume and superficial area of the articular disc, as well as the area of the articular disc surface in the subarticular cavity, were significantly increased compared to that before the surgical treatment（P < 0.01）. There was also a significant increase in the volume of the condyle (P < 0.001). All condyles showed bone remodeling after surgery that could be categorized as one of two types depending on the position of the articular disc, suggesting that the location of the articular disc was related to the new bone formation.

Conclusions: The morphology of the articular disc and condyle were significantly changed after arthroscopic disc repositioning surgery. The 3D changes in the position of the articular disc after surgery tended to have an effect on condylar bone remodeling and the location of new bone formation.

Keywords: Cone-beam computed tomography; Magnetic resonance imaging; Multimodal image registration techniques; Temporomandibular joint; Three-dimensional reconstruction.

MeSH terms

Bone Remodeling
Bone and Bones
Cone-Beam Computed Tomography
Humans
Joint Dislocations* / pathology
Magnetic Resonance Imaging / methods
Mandibular Condyle
Temporomandibular Joint
Temporomandibular Joint Disc* / diagnostic imaging
Temporomandibular Joint Disc* / pathology
Temporomandibular Joint Disc* / surgery