Differences in positions of cone-beam computed tomography landmarks in patients with skeletal Class III facial asymmetry according to midsagittal planes.

IF 2.6 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI:10.4041/kjod23.015

Hyung-Kyu Noh, Ho-Jin Kim, Hyo-Sang Park

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引用次数: 0

Abstract

Objective: This study aimed to clarify differences in the positions of cone-beam computed tomography (CBCT) landmarks according to different midsagittal planes (MSPs) in patients with skeletal Class III facial asymmetry.

Methods: Pre-treatment CBCT data from 60 patients with skeletal Class III were used. The patients were classified into symmetric (menton deviations of < 2 mm) or asymmetric (menton deviations of > 4 mm) groups. Six MSPs were established based on previous studies, and three-dimensional analyses were performed for the planes in both the groups. The measurement outcomes were compared statistically.

Results: A statistically significant interaction (p < 0.01) was observed between MSPs and facial asymmetry. No significant differences were observed among MSPs in the symmetric group. However, significant differences in linear measurements were identified among MSPs in the asymmetric group. Specifically, the upper facial MSP revealed both maxillary and mandibular transverse asymmetries. On the other hand, anterior nasal spine (ANS)-associated MSP could not identify maxillary asymmetry. Furthermore, the menton deviation was approximately 3 mm lower when estimated using the ANS-associated MSP than that using upper facial MSP.

Conclusions: The choice of MSP can significantly affect treatment outcomes while diagnosing patients with asymmetry. Therefore, care should be taken when selecting MSP in clinical practice.

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骨ⅲ类面部不对称患者中矢状面锥形束ct标志位置的差异。

目的:本研究旨在阐明骨型III型面部不对称患者不同正中矢状面(MSPs)锥束计算机断层扫描(CBCT)标志位置的差异。方法:使用60例骨骼III类患者治疗前的CBCT数据。将患者分为对称组(晶状体偏差< 2mm)和非对称组(晶状体偏差> 4mm)。在前人研究的基础上建立了6个msp，并对两组的平面进行了三维分析。对测量结果进行统计学比较。结果:MSPs与面部不对称有显著的交互作用(p < 0.01)。对称组msp间无显著差异。然而，在不对称组的msp中发现了线性测量的显着差异。具体而言，上面部MSP显示上颌和下颌横向不对称。另一方面，鼻前棘(ANS)相关的MSP不能识别上颌不对称。此外，与使用上面部MSP相比，使用ans相关MSP估计的心智偏差约低3mm。结论:在诊断不对称患者时，MSP的选择对治疗结果有显著影响。因此，在临床实践中选择MSP时应谨慎。

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

Korean Journal of Orthodontics DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.50

自引率

10.50%

发文量

审稿时长

>12 weeks

期刊介绍： The Korean Journal of Orthodontics (KJO) is an international, open access, peer reviewed journal published in January, March, May, July, September, and November each year. It was first launched in 1970 and, as the official scientific publication of Korean Association of Orthodontists, KJO aims to publish high quality clinical and scientific original research papers in all areas related to orthodontics and dentofacial orthopedics. Specifically, its interest focuses on evidence-based investigations of contemporary diagnostic procedures and treatment techniques, expanding to significant clinical reports of diverse treatment approaches. The scope of KJO covers all areas of orthodontics and dentofacial orthopedics including successful diagnostic procedures and treatment planning, growth and development of the face and its clinical implications, appliance designs, biomechanics, TMJ disorders and adult treatment. Specifically, its latest interest focuses on skeletal anchorage devices, orthodontic appliance and biomaterials, 3 dimensional imaging techniques utilized for dentofacial diagnosis and treatment planning, and orthognathic surgery to correct skeletal disharmony in association of orthodontic treatment.