Modified Temporomandibular Joint Disc Repositioning With Miniscrew Anchor: Part II—Stability Evaluation By Magnetic Resonance Imaging

Publication date: Available online 24 July 2018

Source: Journal of Oral and Maxillofacial Surgery

Author(s): Qin Zhou, Huimin Zhu, Dongmei He, Chi Yang, Xinyu Song, Edward Ellis

Abstract

Purpose

The purpose of this study was to evaluate the stability of disc position and condylar status by magnetic resonance imaging (MRI) after temporomandibular joint (TMJ) disc repositioning surgery with a miniscrew anchor technique.

Materials and Methods

Patients diagnosed with anterior disc displacement (ADD) and operated for disc repositioning between 2010 and 2016 were included in the study. MRIs within 1 week after operation (T1) and during at least 1 year follow-up (T2) were used to evaluate changes in the disc position and condylar bone. During follow-up, ADD without reduction was considered relapse and the bone status was classified as regeneration or degeneration.

Results

107 patients with 149 joints were included in the study. Postoperative MRIs (T1) showed that all the discs were repositioned. During an average 23.40 months follow-up (range, 12-84 months), 95.3% of the discs (142/149) were still in position, whereas 4.7% of the discs (7/149) had relapsed anteriorly. Condylar new bone formatiom was observed in 74.50% (111/149) of the joints, no bone change in 23.49% (35/149) of the joints, and bone resorption in 2.01% (3/149) of the joints.

Conclusions

TMJ disc repositioning by a miniscrew anchor provides a stable means for the treatment of anterior disc displacement. Disc repositioning can also stimulate condylar bone regeneration.

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