Analysis of changes and correlation in condyle-fossa relationship after maxillary skeletal expansion

IF 2.4 3区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Orthodontics & Craniofacial Research Pub Date : 2024-04-02 DOI:10.1111/ocr.12786

Yezi Qi, Lingmin Ding, LeiLei Xue, SiYi Xu, Jun Lin

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引用次数: 0

Abstract

Objective

To investigate the changes in condyle-glenoid fossa relationship after maxillary skeletal expansion (MSE) and to verify the correlation between the condyle positional changes and expansion effect.

Methods

In this study, 20 patients (mean age 21.1 ± 5.7 years, 8 male, 12 female) with maxillary transverse deficiency (MTD) were treated with the MSE appliance, which contained molar bands and a expander with four micro-implants. The CBCT images were taken before expansion (T0), after expansion (T1) and after 6 months of maintenance (T2). The posterior TMJ space (PS), superior TMJ space (SS), anterior TMJ space, coronal lateral TMJ space (CLS), coronal medial TMJ space (CMS), condyle axis angle, maxillary basal bone width (BWM), inter-molars width, nasal bone width, molar inclination and molar palatal cusp height (U6H) were measured using Dolphin Imaging.

Results

At T1, compared with T0, the PS and SS significantly increased by 0.41 mm (P = .008) and 0.3 mm (P = .007). But only the SS significantly increased by 0.21 mm (P = .025) at T2. There was a significant difference of 0.37 mm (left–right, P = .014) between the left and right SS at T0, but no significant difference at T1 and T2. The increased BMW showed weak positive correlations with the change of PS (P = .015) and CMS (P = .031), and the decreased U6H showed weak negative correlations with the change of PS (P = .015) and CLS (P = .031) at T1.

Conclusions

The use of MSE led to an increase in the SS and PS, which were weakly correlated with BWM and U6H. But this effect in the TMJ space gradually diminished after 6 months of maintenance, and the symmetry of the condyle-fossa relationship was preserved.

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上颌骨扩张后髁窝关系的变化及相关性分析

方法本研究中，20 位上颌骨横向缺损（MTD）患者（平均年龄 21.1 ± 5.7 岁，男性 8 人，女性 12 人）接受了 MSE矫治器治疗，该矫治器包含臼齿带和带有四个微型植入物的扩弓器。CBCT 图像分别在扩弓前（T0）、扩弓后（T1）和维持 6 个月后（T2）拍摄。使用 Dolphin Imaging 测量了颞下颌关节后间隙（PS）、颞下颌关节上间隙（SS）、颞下颌关节前间隙、颞下颌关节冠状外侧间隙（CLS）、颞下颌关节冠状内侧间隙（CMS）、髁轴角、上颌骨基底宽度（BWM）、磨牙间宽度、鼻骨宽度、磨牙倾斜度和磨牙腭尖高度（U6H）。结果与 T0 相比，PS 和 SS 在 T1 显著增加了 0.41 毫米（P = 0.008）和 0.3 毫米（P = 0.007）。但在 T2 阶段，只有 SS 显著增加了 0.21 mm (P = .025)。左侧和右侧的 SS 在 T0 时有 0.37 mm 的明显差异（左-右，P = .014），但在 T1 和 T2 时没有明显差异。BMW 的增加与 PS（P = .015）和 CMS（P = .031）的变化呈弱正相关，而 U6H 的减少与 T1 时 PS（P = .015）和 CLS（P = .031）的变化呈弱负相关。但在维持 6 个月后，颞下颌关节间隙的这种影响逐渐减弱，髁窝关系的对称性得以保持。

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

Orthodontics & Craniofacial Research 医学-牙科与口腔外科

CiteScore

5.30

自引率

3.20%

发文量

审稿时长

>12 weeks

期刊介绍： Orthodontics & Craniofacial Research - Genes, Growth and Development is published to serve its readers as an international forum for the presentation and critical discussion of issues pertinent to the advancement of the specialty of orthodontics and the evidence-based knowledge of craniofacial growth and development. This forum is based on scientifically supported information, but also includes minority and conflicting opinions. The objective of the journal is to facilitate effective communication between the research community and practicing clinicians. Original papers of high scientific quality that report the findings of clinical trials, clinical epidemiology, and novel therapeutic or diagnostic approaches are appropriate submissions. Similarly, we welcome papers in genetics, developmental biology, syndromology, surgery, speech and hearing, and other biomedical disciplines related to clinical orthodontics and normal and abnormal craniofacial growth and development. In addition to original and basic research, the journal publishes concise reviews, case reports of substantial value, invited essays, letters, and announcements. The journal is published quarterly. The review of submitted papers will be coordinated by the editor and members of the editorial board. It is policy to review manuscripts within 3 to 4 weeks of receipt and to publish within 3 to 6 months of acceptance.