单侧后牙反牙合患者下颌髁突和喙突是否存在不对称？
Is there an asymmetry of the condylar and coronoid processes of the mandible in individuals with unilateral crossbite?
出版信息
Angle Orthod. 2019 May;89(3):464-469. doi: 10.2319/052518-398.1. Epub 2018 Dec 28.
OBJECTIVES
To evaluate if there is a true skeletal asymmetry of the condylar and coronoid processes of the mandible in growing individuals with unilateral posterior crossbite (UPC) either functional or not.
MATERIALS AND METHODS
This cross-sectional study screened a total of 1120 cone beam computed tomography (CBCT) scans based on inclusion and exclusion criteria. The final sample comprised 20 CBCT images of individuals with UPC and 19 CBCT images of individuals without transverse malocclusion. The lengths of the condylar and coronoid processes were measured to evaluate asymmetry, as well as the magnitude of the mandibular lateral deviation in the UPC group.
RESULTS
There was a significant difference between the lengths of the affected and nonaffected sides of the coronoid processes in the UPC group ( < .01). The same was not observed in the condyle in the UPC group ( > .05). There were no significant differences between the groups ( > .05).
CONCLUSIONS
Although no differences in the condyle were observed, the coronoid process was asymmetric in individuals with UPC. However, this asymmetry was not considered to be clinically significant.
目的
评估是否存在单侧后牙反牙合（UPC）患者下颌髁突和喙突的真正骨骼不对称，无论其为功能性还是非功能性。
材料和方法
本横断面研究根据纳入和排除标准筛选了总共 1120 例锥形束 CT（CBCT）扫描。最终样本包括 20 例 UPC 患者的 CBCT 图像和 19 例无横向错颌患者的 CBCT 图像。测量髁突和喙突的长度以评估不对称性，以及 UPC 组下颌侧向偏斜的程度。
结果
UPC 组喙突患侧和非患侧的长度有显著差异（<0.01）。在 UPC 组的髁突中未观察到同样的情况（>0.05）。两组之间无显著差异（>0.05）。
结论
尽管在髁突中未观察到差异，但 UPC 患者的喙突是不对称的。然而，这种不对称性被认为不具有临床意义。
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