Canigur Bavbek Nehir, Akay Gülsün, Kar İrem, Tuncer Cumhur, Güngör Kahraman, Baloş Tuncer Burcu
Department of Orthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Gazi University, Ankara, Turkey.
Am J Orthod Dentofacial Orthop. 2022 Nov;162(5):626-635. doi: 10.1016/j.ajodo.2021.05.017. Epub 2022 Aug 9.
This study aimed to analyze the association of unilateral and bilateral palatal canine impaction with the dimensions and morphology of sella turcica from 3-dimensional cone-beam computed tomography (CBCT) images.
CBCT images of patients with bilateral (BPI) (n = 12; 9 female 3 male; 20.75 ± 5.88 years) and unilateral (UPI) (n = 35; 22 female 13 male; 19.28 ± 5.57 years) palatally impacted canines were compared with a control group (n = 56; 34 female 22 male; 20.82 ± 4.88 years). Linear measurements regarding sella turcica were made, and its morphologic variations were categorized. Two group comparisons were made with the Student t test or Mann-Whitney U-test, whereas one-way analysis of variance or Kruskal-Wallis tests were used for multiple group comparisons. Categorical variables were compared using the chi-square or Fisher exact test as appropriate. The binary logistic regression analyses and correlations using Spearman or Pearson correlation analyses were used to determine associations between variables (P <0.05).
Sella diameter was significantly smaller in the BPI group compared to UPI and control groups. There was a significant association between sella diameter and BPI when compared with the control group (χ[1] = 9.150; P = 0.008). There were no significant differences between groups in the distribution of sella turcica morphology.
Despite the similar genetic origin of the sella turcica region and teeth, the association of palatal canine impaction with dimensions and morphology of sella turcica was weak. Both local and genetic factors might contribute to the ectopic position of the canine.
本研究旨在通过三维锥形束计算机断层扫描（CBCT）图像分析单侧和双侧腭侧尖牙阻生与蝶鞍的尺寸和形态之间的关联。
将双侧腭侧尖牙阻生（BPI）患者（n = 12；9名女性，3名男性；20.75±5.88岁）和单侧腭侧尖牙阻生（UPI）患者（n = 35；22名女性，13名男性；19.28±5.57岁）的CBCT图像与对照组（n = 56；34名女性，22名男性；20.82±4.88岁）进行比较。对蝶鞍进行线性测量，并对其形态变化进行分类。两组比较采用Student t检验或Mann-Whitney U检验，而多组比较则采用单因素方差分析或Kruskal-Wallis检验。分类变量使用卡方检验或Fisher精确检验进行比较。采用二元逻辑回归分析以及Spearman或Pearson相关分析来确定变量之间的关联（P <0.05）。
与UPI组和对照组相比，BPI组的蝶鞍直径明显更小。与对照组相比，蝶鞍直径与BPI之间存在显著关联（χ[1]= 9.150；P = 0.008）。蝶鞍形态分布在各组之间没有显著差异。
尽管蝶鞍区域和牙齿有相似的遗传起源，但腭侧尖牙阻生与蝶鞍的尺寸和形态之间的关联较弱。局部因素和遗传因素可能都导致了尖牙的异位。
