Verner Francielle Silvestre, Roque-Torres Gina Delia, Ramírez-Sotello Laura Ricardina, Devito Karina Lopes, Almeida Solange Maria
Department of Dentistry, Division of Oral Radiology, Federal University of Juiz de Fora/Governador Valadares Advanced Campus, Governador Valadares, Minas Gerais, Brazil.
Research Associate, Center of Dental Research, Loma Linda University, Loma Linda, CA, USA.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2017 Oct;124(4):420-431. doi: 10.1016/j.oooo.2017.07.004. Epub 2017 Jul 26.
The aim of the study was to assess the correlation between the morphology of the dental arches (DAs) of patients with normal occlusion and of the articular eminence (AE) by using cone beam computed tomography (CBCT).
CBCT scans of 60 patients were evaluated in terms of height and inclinations (angles α, β, and δ) of the AE. DAs were classified according to their shapes (tapered, square, ovoid), and their perimeters, widths, and depths were measured. One-way analysis of variance, Pearson's correlation coefficients, and simple and multivariate linear regression models were used for the calculations.
The ovoid arch was the most predominant shape (n = 66/120). Inclination of the AE (angle β) had the greatest difference between DA shapes, with this angle usually being greater in the ovoid arch and smaller in the square arch (P < .05). The height of the AE presented greater correlation with DA measurements, with tapered arches having the most significant correlations (P < .05). DA depth had no influence on AE measurements (P > .05). The perimeter and width of the DAs had some influence (P < .05).
Correlations were found between the DA and AE morphologies. The correlations should be taken into consideration, although the results do not prove absolute association between the variables. Whenever possible, the morphologic features of DAs should be preserved to avoid possible changes in AE.
本研究旨在通过锥形束计算机断层扫描（CBCT）评估正常咬合患者的牙弓（DAs）形态与关节结节（AE）之间的相关性。
对60例患者的CBCT扫描进行评估，测量AE的高度和倾斜度（角度α、β和δ）。根据DAs的形状（锥形、方形、椭圆形）进行分类，并测量其周长、宽度和深度。使用单因素方差分析、Pearson相关系数以及简单和多元线性回归模型进行计算。
椭圆形牙弓是最主要的形状（n = 66/120）。AE的倾斜度（角度β）在不同牙弓形状之间差异最大，该角度通常在椭圆形牙弓中较大，在方形牙弓中较小（P <.05）。AE的高度与牙弓测量值的相关性更强，锥形牙弓的相关性最为显著（P <.05）。牙弓深度对AE测量值无影响（P >.05）。牙弓的周长和宽度有一定影响（P <.05）。
发现牙弓和关节结节形态之间存在相关性。尽管结果并未证明变量之间存在绝对关联，但这些相关性仍应予以考虑。只要有可能，应保留牙弓的形态特征以避免关节结节发生可能的变化。
