Association between the severity of hypodontia and the characteristics of craniofacial morphology in a Chinese population: A cross-sectional study.

IF 2.6 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Korean Journal of Orthodontics Pub Date : 2023-05-25 DOI:10.4041/kjod22.073

Xin Xiong, Jiaqi Liu, Yange Wu, Chengxinyue Ye, Qinlanhui Zhang, Yufan Zhu, Wenke Yang, Jun Wang

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Abstract

Objective: To investigate craniofacial differences in individuals with hypodontia and explore the relationship between craniofacial features and the number of congenitally missing teeth.

Methods: A cross-sectional study was conducted among 261 Chinese patients (males, 124; females, 137; age, 7-24 years), divided into four groups (without hypodontia: no teeth missing, mild: one or two missing teeth, moderate: three to five missing teeth, severe: six or more missing teeth) according to the number of congenitally missing teeth. Differences in cephalometric measurements among the groups were analyzed. Further, multivariate linear regression and smooth curve fitting were performed to evaluate the relationship between the number of congenitally missing teeth and the cephalometric measurements.

Results: In patients with hypodontia, SNA, NA-AP, FH-NA, ANB, Wits, ANS-Me/N-Me, GoGn-SN, UL-EP, and LL-EP significantly decreased, while Pog-NB, AB-NP, N-ANS, and S-Go/N-Me significantly increased. In multivariate linear regression analysis, SNB, Pog-NB, and S-Go/N-Me were positively related to the number of congenitally missing teeth. In contrast, NA-AP, FH-NA, ANB, Wits, N-Me, ANS-Me, ANS-Me/N-Me, GoGn-SN, SGn-FH (Y-axis), UL-EP, and LL-EP were negatively related, with absolute values of regression coefficients ranging from 0.147 to 0.357. Further, NA-AP, Pog-NB, S-Go/N-Me, and GoGn-SN showed the same tendency in both sexes, whereas UL-EP and LL-EP were different.

Conclusions: Compared with controls, patients with hypodontia tend toward a Class III skeletal relationship, reduced lower anterior face height, flatter mandibular plane, and more retrusive lips. The number of congenitally missing teeth had a greater effect on certain characteristics of craniofacial morphology in males than in females.

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中国人群下颌缺损严重程度与颅面形态特征之间的关系:一项横断面研究。

目的:观察下颌缺损患者颅面特征的差异，探讨颅面特征与先天性缺牙数的关系。方法:对261例中国患者进行横断面研究(男性124例;女性,137;年龄，7-24岁)，根据先天性缺牙数分为四组(无牙下缺损:无缺牙，轻度:缺牙1 ~ 2颗，中度:缺牙3 ~ 5颗，重度:缺牙6颗以上)。分析各组间头颅测量的差异。通过多元线性回归和平滑曲线拟合来评价先天性缺牙数与头颅测量值的关系。结果:下颌缺损患者SNA、NA-AP、FH-NA、ANB、Wits、ANS-Me/N-Me、GoGn-SN、UL-EP、LL-EP显著降低，Pog-NB、AB-NP、N-ANS、S-Go/N-Me显著升高。在多元线性回归分析中，SNB、Pog-NB、S-Go/N-Me与先天性缺牙数呈正相关。NA-AP、FH-NA、ANB、Wits、N-Me、ANS-Me、ANS-Me/N-Me、GoGn-SN、SGn-FH (y轴)、UL-EP和LL-EP呈负相关，回归系数绝对值为0.147 ~ 0.357。此外，NA-AP、Pog-NB、S-Go/N-Me和GoGn-SN在两性中表现出相同的趋势，而UL-EP和LL-EP则不同。结论:与对照组相比，牙下症患者倾向于III类骨骼关系，下前脸高度降低，下颌平面平坦，唇后倾。先天缺牙的数量对男性颅面形态的某些特征的影响大于女性。

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.