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Abstract：
BACKGROUND: The study evaluates the position and displacement tendency of unerupted maxillary canines in orthodontic patients with non-syndromic craniofacial disorders (CD) compared to a control (C) group.
METHODS: Canine position and displacement tendency were evaluated using panoramic radiographs (PAN) examined with parameters such as sector classification (sectors 1-5) and inclination angles (α and β). The displacement tendency was defined as the positioning of the tip in sectors 1 or 2, as well as its combination with increased angles (α > 30° and β > 39°). In addition, the correlation of the tooth position and agenesis, cleft side, and sex was assessed.
RESULTS: A total of 116 pre-treatment PAN, divided into the CD group (n = 50; mean age 8.32 ± 2.27 years) and the C group (n = 66; mean age 10.80 ± 2.82 years), were evaluated in this study. The sector classification showed no displacement tendency in both groups. Inclination angles α/β showed a statistically significant higher displacement tendency (p = 0.01) of the CD group (n = 5) on the right side, compared to healthy subjects (n = 1). Male CD patients had a statistically significant higher displacement tendency on the right side (p = 0.03). A statistically significant correlation between cleft and non-cleft-side (p = 0.03) was found.
CONCLUSIONS: Patients with CD showed a statistically significant higher displacement tendency of the maxillary canine affected by the cleft side. The inclination angle was found to be the better predictor compared to the sector classification which should be considered in the orthodontic treatment planning.
METHODS: Canine position and displacement tendency were evaluated using panoramic radiographs (PAN) examined with parameters such as sector classification (sectors 1-5) and inclination angles (α and β). The displacement tendency was defined as the positioning of the tip in sectors 1 or 2, as well as its combination with increased angles (α > 30° and β > 39°). In addition, the correlation of the tooth position and agenesis, cleft side, and sex was assessed.
RESULTS: A total of 116 pre-treatment PAN, divided into the CD group (n = 50; mean age 8.32 ± 2.27 years) and the C group (n = 66; mean age 10.80 ± 2.82 years), were evaluated in this study. The sector classification showed no displacement tendency in both groups. Inclination angles α/β showed a statistically significant higher displacement tendency (p = 0.01) of the CD group (n = 5) on the right side, compared to healthy subjects (n = 1). Male CD patients had a statistically significant higher displacement tendency on the right side (p = 0.03). A statistically significant correlation between cleft and non-cleft-side (p = 0.03) was found.
CONCLUSIONS: Patients with CD showed a statistically significant higher displacement tendency of the maxillary canine affected by the cleft side. The inclination angle was found to be the better predictor compared to the sector classification which should be considered in the orthodontic treatment planning.
摘要：
背景：该研究评估了与对照组（C）相比，患有非综合征性颅面疾病（CD）的正畸患者未萌出的上颌犬齿的位置和移位趋势。
方法：使用全景射线照片（PAN）评估了犬科动物的位置和位移趋势，其中包括扇区分类（扇区1-5）和倾角（α和β）等参数。位移趋势定义为尖端在扇区1或2中的定位，以及其与增加角度（α>30°和β>39°）的组合。此外,牙齿位置和发育不全的相关性，裂口一侧,性别进行了评估。
结果：总共116个预处理PAN，分为CD组（n=50；平均年龄8.32±2.27岁）和C组（n=66；平均年龄10.80±2.82岁），在这项研究中进行了评估。部门分类显示两组均无流离失所趋势。倾斜角度α/β在右侧显示出CD组（n=5）具有统计学意义的较高位移趋势（p=0.01），与健康受试者相比（n=1）。男性CD患者在右侧具有统计学上显着的较高位移趋势（p=0.03）。发现裂隙和非裂隙侧之间具有统计学上的显着相关性（p=0.03）。
结论：患有CD的患者显示出受裂侧影响的上颌犬的更高的移位趋势。与在正畸治疗计划中应考虑的扇形分类相比，倾斜角被发现是更好的预测指标。
方法：使用全景射线照片（PAN）评估了犬科动物的位置和位移趋势，其中包括扇区分类（扇区1-5）和倾角（α和β）等参数。位移趋势定义为尖端在扇区1或2中的定位，以及其与增加角度（α>30°和β>39°）的组合。此外,牙齿位置和发育不全的相关性，裂口一侧,性别进行了评估。
结果：总共116个预处理PAN，分为CD组（n=50；平均年龄8.32±2.27岁）和C组（n=66；平均年龄10.80±2.82岁），在这项研究中进行了评估。部门分类显示两组均无流离失所趋势。倾斜角度α/β在右侧显示出CD组（n=5）具有统计学意义的较高位移趋势（p=0.01），与健康受试者相比（n=1）。男性CD患者在右侧具有统计学上显着的较高位移趋势（p=0.03）。发现裂隙和非裂隙侧之间具有统计学上的显着相关性（p=0.03）。
结论：患有CD的患者显示出受裂侧影响的上颌犬的更高的移位趋势。与在正畸治疗计划中应考虑的扇形分类相比，倾斜角被发现是更好的预测指标。
