不同矢状面型成人牙颌面横向宽度的三维评估。

Three-dimensional evaluation of dentofacial transverse widths in adults with different sagittal facial patterns.

机构信息

Department of Orthodontics, Gangnam Severance Dental Hospital, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea.

出版信息

Am J Orthod Dentofacial Orthop. 2018 Sep;154(3):365-374. doi: 10.1016/j.ajodo.2017.11.041.

DOI:10.1016/j.ajodo.2017.11.041

PMID:30173839

Abstract

INTRODUCTION

The aim of this study was to evaluate the dentofacial transverse dimensions of subjects with different sagittal facial patterns using 3-dimensional cone-beam computed tomography images.

METHODS

Cone-beam computed tomography images of 63 men and 80 women were divided into skeletal Class I, Class II, and Class III groups. Skeletal and dental evaluations were made on frontal views and coronal cross-sections of the images. Independent 2-sample t tests and 1-way analysis of variance followed by post hoc Tukey tests were used for sex and group differences. Pearson correlation analysis was used to identify factors related to changes in ANB angle.

RESULTS

The Class II subjects did not show differences in maxillomandibular width and maxillary width compared with Class I subjects; however, their maxillary molars were more lingually tipped. The Class III subjects showed greater maxillomandibular width differences and smaller maxillary widths and maxillary buccolingual alveolar widths at midroot level compared with Class I subjects. The maxillary molars were buccally inclined, and the mandibular molars were lingually compensated in Class III subjects. The ANB angle showed positive correlations with jugal process width, maxillary width, and maxillary buccolingual alveolar width at midroot level as well as mandibular molar buccal inclination; negative correlations were found in maxillomandibular width difference, mandibular width at midroot level, and maxillary molar buccal inclination.

CONCLUSIONS

A relative comparison of Class I, Class II, and Class III subjects showed that dental compensation had occurred to overcome the transverse skeletal discrepancies in the maxillary posterior segments of Class II and Class III subjects. This could escalate unidentified periodontal and functional problems in the long term. Future studies of transverse dentofacial dimensions, including periodontal evaluations and occlusal forces, would be useful for delivering proper orthodontic treatment for skeletal Class II and Class III subjects.

摘要

简介

本研究旨在通过三维锥形束 CT 图像评估不同矢状面面部模式患者的牙颌面横向尺寸。

方法

将 63 名男性和 80 名女性的锥形束 CT 图像分为骨骼 I 类、II 类和 III 类组。在图像的正面视图和冠状横断面进行骨骼和牙齿评估。使用独立样本 t 检验和单因素方差分析，随后进行事后 Tukey 检验，比较性别和组间差异。使用 Pearson 相关分析确定与 ANB 角变化相关的因素。

结果

与 I 类组相比，II 类组的上颌骨和下颌骨宽度以及上颌宽度没有差异，但上颌磨牙更向舌侧倾斜。III 类组与 I 类组相比，上颌骨和下颌骨宽度差异更大，上颌宽度和上颌牙槽骨颊舌向宽度在根尖水平更小。上颌磨牙向颊侧倾斜，下颌磨牙向舌侧补偿。ANB 角与颧骨宽度、上颌宽度和上颌牙槽骨颊舌向宽度在根尖水平以及下颌磨牙颊侧倾斜呈正相关；与上颌骨和下颌骨宽度差异、下颌骨根尖水平宽度和上颌磨牙颊侧倾斜呈负相关。