Effect of Mandibular Advancement on Condylar Remodelling of Class II Malocclusion Adolescent Patients With or Without Anterior Disc Displacement: A Retrospective Study

IF 3.1 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of oral rehabilitation Pub Date : 2025-04-11 DOI:10.1111/joor.13967

Cunyi Wang, Na Wu, Chenyu Wang, Shiyu Hu, Yu Chen, Jiejun Shi

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引用次数: 0

Abstract

Objective

To compare condylar remodelling in Class II malocclusion adolescents with or without anterior disc displacement (ADD) before and after treatment with mandibular advancement.

Methods

CBCT data were collected from 20 Class II division 1 malocclusion adolescent patients with normal disc-condyle relationships and 20 Class II division 1 malocclusion adolescent patients with ADD, before and after mandibular advancement. All the TMJs were classified into three types: normal disc-condyle relationship joint, anterior disc displacement with reduction (ADDwR) joint, and anterior disc displacement without reduction (ADDwoR) joint. 3D Slicer 5.0.3 software was used to compare the quantitative index changes before and after treatment, including condylar volume, superficial area, morphological index, maximum cross-sectional area, width, depth, height and length. In addition, three-dimensional reconstructions and superimpositions of the condyle-glenoid fossa were performed to visualise condylar remodelling, and the condylar osseous change during treatment was evaluated qualitatively.

Results

Before treatment, the morphological index and depth of the condyle were smaller in the ADDwoR joint. After treatment, condylar dimensions increased in all three types. The amount of increase in various indices of the ADDwR joint was comparable to that of the normal joint, with the highest rate of condylar repair and regeneration observed in the ADDwR joint. Specifically, the condylar volume changes in the normal joint (95% CI: 187.59 ± 107.05) and the ADDwR joint (95% CI: 199.97 ± 135.32) showed no significant difference (p = 0.672). The increase in condylar volume (p < 0.05), superficial area (p < 0.01) and length (p < 0.01) in the ADDwoR joint was lower than that in the normal joint. Three-dimensional reconstructions showed posterior and superior condylar growth in all three types.

Conclusion

Mandibular advancement significantly promotes condylar remodelling in Class II malocclusion adolescent patients, with or without ADD, effectively promoting the backward growth of the condyle. Condylar growth of ADDwR joints was comparable to that of normal joints, while the condylar growth of ADDwoR joints was less.

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下颌前移对伴有或不伴有前盘移位的青少年II类错牙合患者髁突重塑的影响：一项回顾性研究。

目的：比较有前盘移位（ADD）和无前盘移位（ADD）的青少年II类错颌畸形在下颌骨前移治疗前后的髁突重建情况。方法：收集20例椎间盘-髁关系正常的青少年II类1分错和20例患有ADD的青少年II类1分错，分别在下颌前进前后的CBCT数据。所有TMJs分为正常椎间盘-髁关系关节、椎间盘前移位复位（ADDwR）关节和椎间盘前移位不复位（ADDwoR）关节三种类型。采用3D Slicer 5.0.3软件比较治疗前后髁突体积、表面积、形态学指标、最大截面积、宽度、深度、高度、长度等定量指标的变化。此外，对髁-盂窝进行三维重建和叠加以观察髁重构，并对治疗期间的髁骨变化进行定性评估。结果：治疗前，ADDwoR关节的形态指标和髁突深度均较小。治疗后，三种类型的髁突尺寸均增加。ADDwR关节各项指标的增加量与正常关节相当，其中ADDwR关节的髁突修复和再生率最高。其中，正常关节（95% CI: 187.59±107.05）与ADDwR关节（95% CI: 199.97±135.32）的髁突体积变化差异无统计学意义（p = 0.672）。结论：青少年II类错颌患者，不论有无ADD，下颌前移均能显著促进髁突重塑，有效促进髁突向后生长。ADDwR关节的髁突生长与正常关节相当，而ADDwoR关节的髁突生长较少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of oral rehabilitation 医学-牙科与口腔外科

CiteScore

5.60

自引率

10.30%

发文量

116

审稿时长

4-8 weeks

期刊介绍： Journal of Oral Rehabilitation aims to be the most prestigious journal of dental research within all aspects of oral rehabilitation and applied oral physiology. It covers all diagnostic and clinical management aspects necessary to re-establish a subjective and objective harmonious oral function. Oral rehabilitation may become necessary as a result of developmental or acquired disturbances in the orofacial region, orofacial traumas, or a variety of dental and oral diseases (primarily dental caries and periodontal diseases) and orofacial pain conditions. As such, oral rehabilitation in the twenty-first century is a matter of skilful diagnosis and minimal, appropriate intervention, the nature of which is intimately linked to a profound knowledge of oral physiology, oral biology, and dental and oral pathology. The scientific content of the journal therefore strives to reflect the best of evidence-based clinical dentistry. Modern clinical management should be based on solid scientific evidence gathered about diagnostic procedures and the properties and efficacy of the chosen intervention (e.g. material science, biological, toxicological, pharmacological or psychological aspects). The content of the journal also reflects documentation of the possible side-effects of rehabilitation, and includes prognostic perspectives of the treatment modalities chosen.