Evaluation of nasal septal deviation and maxillary bone and nasal airway dimensions and volumes using cone-beam computed tomography in patients with unilateral palatal canine displacement: a retrospective study

Safa A. Azim Osman, Elham Abu Alhaija, Ahed M. Alwahadni, Emad Al Maaitah, Saba O. Daher, Hasan O. Daher, Hamza AlTal
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Abstract

To detect any association between palatally displaced canine (PDC) and nasal septal deviation (NSD), palatal bone thickness and volume, and nasal airway dimensions and volume. A total of 92 patients were included and subdivided into two groups: group 1, unilateral PDCs (44 patients), and group 2, normally erupted canines (NDCs) (48 subjects). The following variables were measured using cone-beam computed tomography: presence and type of NSD, nasal width, inferior conchae, hard palate and nasal septum thickness, maxillary bone and nasal airway volumes. NSD was detected in 77% and 50% of PDC and NDC subjects, respectively. Within the PDC subjects, significant differences between the displaced and nondisplaced sides were detected. Palate thickness was increased in the canine region and reduced in the molar region. Compared with the control group, PDC subjects had reduced palate thickness and lower nasal airway volume. Two predictors were significant for predicting the odds of PDC occurrence: NSD and maxillary bone volume. NSD is more frequent in PDC subjects. PDC subjects have reduced palate thickness and decreased nasal airway volume. In the presence of NSD, the odds of developing PDC increase by 3.35 times, and for each one-unit increase in the maxillary bone volume, the odds of developing PDC decrease by 20%.
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使用锥形束计算机断层扫描评估单侧腭犬牙移位患者的鼻中隔偏曲、上颌骨和鼻腔气道尺寸和体积:一项回顾性研究
检测腭移位犬齿(PDC)与鼻中隔偏曲(NSD)、腭骨厚度和体积以及鼻腔气道尺寸和体积之间是否存在关联。 共纳入 92 名患者,并将其分为两组:第一组为单侧 PDC(44 名患者),第二组为正常萌出的犬齿(48 名受试者)。使用锥形束计算机断层扫描测量了以下变量:NSD 的存在和类型、鼻腔宽度、下鼻甲、硬腭和鼻中隔厚度、上颌骨和鼻气道体积。 在 PDC 和 NDC 受试者中,分别有 77% 和 50% 的人检测出 NSD。在 PDC 受试者中,移位侧和非移位侧之间存在显著差异。犬齿区的腭厚度增加,臼齿区的腭厚度减少。与对照组相比,PDC 受试者的腭部厚度减少,鼻腔气道容积降低。在预测 PDC 发生几率方面,有两个预测因子具有重要意义:NSD和上颌骨体积。 NSD 在 PDC 受试者中更为常见。PDC受试者的腭部厚度减少,鼻腔气道容积减小。如果存在 NSD,发生 PDC 的几率会增加 3.35 倍,上颌骨体积每增加一个单位,发生 PDC 的几率就会降低 20%。
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