Changes of functional units in type IIA craniofacial microsomia before puberty-a preliminary computed tomography study.

IF 2.2 3区医学 Q2 Dentistry Journal of Stomatology Oral and Maxillofacial Surgery Pub Date : 2024-10-09 DOI:10.1016/j.jormas.2024.102111

Xiyuan Li, Lianjie Chen, Zhiyong Zhang

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Abstract

Background: The natural growth of the mandible in craniofacial microsomia (CFM) remains a topic of considerable debate. This study aims to characterize the mandibular architecture and its natural growth in children with type IIA CFM using functional unit analysis.

Materials and methods: 16 sets CT data of 8 unoperated children with unilateral IIA CFM with an interval ranging from 2 to 6 years (3.4±1.5 years,AVR±SD)were collected. The baseline skeletal units' discrepancy in size, annual growth, and angular measurements were analyzed.

Results: The condylar, coronoid, and body units were smaller (reaching 63%, 79%, and 90% of the unaffected side, respectively) while the angular unit was larger on the affected side. The condylar unit on the affected side grew slower than the unaffected side, at about 60% of its rate, and other units showed no statistically significant bilateral differences. The backward rotation angle of the affected body unit (BUA) increased from T1 to T2.

Conclusion: This preliminary study suggests that the condyle unit is the center of mandible deformity in type IIA CFM and exhibits insufficient growth relative to the unaffected side . Meanwhile, the hemi-mandible on the affected side rotated posteriorly during growth, thus worsening spatial relation. Future studies with larger sample sizes that incorporate clinical assessments are needed to elucidate the progression of CFM.

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青春期前 IIA 型颅面小畸形的功能单元变化--计算机断层扫描初步研究。

背景：颅面显微畸形（CFM）患者下颌骨的自然生长仍是一个颇具争议的话题。本研究旨在利用功能单元分析法描述 IIA 型 CFM 患儿下颌骨结构及其自然生长的特征。材料与方法：本研究收集了 8 名单侧 IIA 型 CFM 未手术患儿的 16 组 CT 数据，数据间隔时间为 2 至 6 年（3.4±1.5 年，AVR±SD）。对基线骨骼单位的尺寸差异、年生长量和角度测量结果进行了分析：结果：患侧的髁状突、冠状突和体单位较小（分别为未受影响侧的63%、79%和90%），而角单位较大。患侧髁状突单位的生长速度比未受影响侧慢，约为其生长速度的 60%，其他单位的双侧差异无统计学意义。从 T1 到 T2，患侧髁状突单位（BUA）的向后旋转角度有所增加：这项初步研究表明，髁状突单位是 IIA 型 CFM 下颌骨畸形的中心，相对于未受影响的一侧，髁状突单位表现出生长不足。同时，受影响一侧的半下颌骨在生长过程中向后旋转，从而使空间关系更加恶化。未来的研究需要更大的样本量并结合临床评估，以阐明 CFM 的发展过程。

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 Stomatology Oral and Maxillofacial Surgery Dentistry-Oral Surgery

CiteScore

2.20

自引率

9.10%

发文量

305

期刊介绍： J Stomatol Oral Maxillofac Surg publishes research papers and techniques - (guest) editorials, original articles, reviews, technical notes, case reports, images, letters to the editor, guidelines - dedicated to enhancing surgical expertise in all fields relevant to oral and maxillofacial surgery: from plastic and reconstructive surgery of the face, oral surgery and medicine, … to dentofacial and maxillofacial orthopedics. Original articles include clinical or laboratory investigations and clinical or equipment reports. Reviews include narrative reviews, systematic reviews and meta-analyses. All manuscripts submitted to the journal are subjected to peer review by international experts, and must: Be written in excellent English, clear and easy to understand, precise and concise; Bring new, interesting, valid information - and improve clinical care or guide future research; Be solely the work of the author(s) stated; Not have been previously published elsewhere and not be under consideration by another journal; Be in accordance with the journal''s Guide for Authors'' instructions: manuscripts that fail to comply with these rules may be returned to the authors without being reviewed. Under no circumstances does the journal guarantee publication before the editorial board makes its final decision. The journal is indexed in the main international databases and is accessible worldwide through the ScienceDirect and ClinicalKey Platforms.