Shanghai Jiao Tong University (SJTU) - Shanghai Key Laboratory of Stomatology
Abstract
Objectives: The aim of this retrospective self-controlled study was to investigate the association between condylar height and temporomandibular joint anterior disc displacement (ADD) in different age groups.
Materials and Methods: Patient characteristics, condylar height, disc length, and displacement distance at the baseline (T0) and the second follow-up visit (T1) were collected, and the differences between the two-time points were analyzed using paired t test and generalized estimating equation.
Results: A total of 149 patients who were diagnosed with unilateral ADD were included. The condylar height decreased 0.66 mm in the affected side, and increased 1.37 mm in the non-affected side after the follow up. The further subgroup analysis revealed that, in the 11 ~ 17 age group, there was no significant condylar growth in the affected side, but a significant condylar height increase in the non-affected side. In the subgroup above 18 years old, a considerable reduction was observed in the affected side.
Conclusions: ADD results in condylar growth inhibition in the young patients, and condylar resorption in the adult patients. Clincians should pay more attention to the condylar condition in ADD patients, and appropriate intervention is necessary, especially in the young patients.
Note:
Funding Information: This study is supported by the National Key R&D Program of China (2023YFC2509100); National Natural Science Foundation of China (82071134)；Dominant disease biological sample project of the Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (YBKA202201).
Declaration of Interests: The authors declare that they have no competing interests.
Ethics Approval Statement: The Ethics Committee of the Ninth People's Hospital affiliated to the Shanghai Jiao Tong University School of Medicine approved this study (SH9H-2020-T7–1).
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