Associations with Lip Cant and Facial Midline Correction Following Bimaxillary Surgery in Class III Asymmetry: A CBCT-Based Analysis.

IF 4.4 3区医学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Biomedical Journal Pub Date : 2025-06-12 DOI:10.1016/j.bj.2025.100877

Chih-Ling Lin, Yun-Fang Chen, Ying-An Chen, Chuan-Fong Yao, Tong Xi, Yu-Fang Liao, Yu-Ray Chen

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引用次数: 0

Abstract

Background: This study evaluated the outcomes of bimaxillary surgery for class III asymmetry and lip cant, and identified factors associated with lip cant and facial midline correction.

Materials and methods: Fifty adult patients (22 females, 28 males; mean age: 24.8 ± 5.1 years) with class III asymmetry and lip cant who underwent bimaxillary surgery were prospectively and consecutively analyzed. Cone-beam computed tomography (CBCT) scans obtained preoperatively and at postoperative follow-up were superimposed to assess surgical jaw movements in six degrees of freedom and their effects on lip cant and facial midline symmetry.

Results: Significant reductions were observed in lip cant (1.6 ± 1.6 mm), lower lip deviation (2.4 ± 1.7 mm), chin deviation (5.8 ± 4.2 mm), and facial midline deviation (9.7 ± 7.2 mm). Multiple linear regression analysis identified mandibular roll correction (β = 0.456, P < 0.01) and pre-treatment lip cant severity (β = 0.394, P < 0.01) as significant factors of lip cant reduction. Additionally, chin shift (β = 0.495, P < 0.01) and mandibular shift (β = 0.461, P < 0.01) were significant factors of facial midline correction.

Conclusion: Bimaxillary surgery significantly improved lip cant and facial midline deviation in patients with class III asymmetry and lip cant. Mandibular roll correction and pre-treatment lip cant severity were key factors associated with lip cant correction, while chin and mandibular shift correction were associated with facial midline improvement.

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双颌III类不对称手术后唇斜和面部中线矫正的相关性：基于cbct的分析。

背景：本研究评估了III类不对称和唇斜的双颌手术的结果，并确定了唇斜和面部中线矫正的相关因素。材料与方法：50例成人患者(女性22例，男性28例；平均年龄：24.8±5.1岁)，伴有III类不对称和唇裂，行双颌手术的患者进行前瞻性和连续性分析。术前和术后随访的锥形束计算机断层扫描（CBCT）进行了叠加，以评估手术下颌在六自由度的运动及其对唇斜和面部中线对称的影响。结果：唇部偏斜（1.6±1.6 mm）、下唇偏斜（2.4±1.7 mm）、下颌偏斜（5.8±4.2 mm）、面部中线偏斜（9.7±7.2 mm）明显减小。多元线性回归分析发现，下颌侧倾矫正（β = 0.456, P < 0.01）和治疗前唇斜严重程度（β = 0.394, P < 0.01）是唇斜减少的显著因素。下颌移位（β = 0.495, P < 0.01）和下颌移位（β = 0.461, P < 0.01）是面部中线矫正的显著影响因素。结论：双颌手术可明显改善III类不对称伴唇斜患者的唇斜和面部中线偏斜。下颌侧倾矫正和治疗前唇斜矫正的严重程度是影响唇斜矫正的关键因素，而下颌侧移矫正与面部中线改善相关。

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

Biomedical Journal Medicine-General Medicine

CiteScore

11.60

自引率

1.80%

发文量

128

审稿时长

42 days

期刊介绍： Biomedical Journal publishes 6 peer-reviewed issues per year in all fields of clinical and biomedical sciences for an internationally diverse authorship. Unlike most open access journals, which are free to readers but not authors, Biomedical Journal does not charge for subscription, submission, processing or publication of manuscripts, nor for color reproduction of photographs. Clinical studies, accounts of clinical trials, biomarker studies, and characterization of human pathogens are within the scope of the journal, as well as basic studies in model species such as Escherichia coli, Caenorhabditis elegans, Drosophila melanogaster, and Mus musculus revealing the function of molecules, cells, and tissues relevant for human health. However, articles on other species can be published if they contribute to our understanding of basic mechanisms of biology. A highly-cited international editorial board assures timely publication of manuscripts. Reviews on recent progress in biomedical sciences are commissioned by the editors.