上颌腭侧阻生尖牙与寰椎后桥相关性的锥形束CT研究

Association between ponticulus posticus and maxillary palatally impacted canine: a cone-beam computed tomography study

目的利用锥形束CT(CBCT)研究上颌腭侧阻生尖牙患者寰椎后桥的发生情况及其相关性。方法选取117例上颌尖牙腭侧阻生患者作为实验组,147例上颌尖牙正常萌出者作为对照组。通过CBCT影像结合Mimics 20.0三维测量软件观察寰椎后桥形态。采用SPSS 21.0软件进行数据统计分析。结果实验组寰椎后桥发生率为35.04%,对照组寰椎后桥发生率为21.09%,组间寰椎后桥发生率的差异具有统计学意义(P<0.05)。组间单侧与双侧寰椎后桥发生率无明显差异(P>0.05)。实验组男性寰椎后桥发生率明显高于女性(P<0.05),而对照组性别无明显差异(P>0.05)。实验组中寰椎后桥1+2型的发生率高于对照组(P<0.05)。结论上颌尖牙腭侧阻生患者寰椎后桥的发生率明显高于上颌尖牙正常萌出者,且男性上颌尖牙腭侧阻生患者发生寰椎后桥的概率更大。

Objective This study was performed to investigate the association and prevalence of ponticulus posticus in patients with maxillary palatally impacted canine by using cone-beam computed tomography(CBCT). Methods We selected 117 patients with maxillary palatally impacted canine as the experimental group and 147 with normally erupted canine as the control group. CBCT images and Mimics 20.0 software were used to record the morphology of the ponticulus posticus. Statistical analysis was performed using SPSS 21.0. Results The prevalence rates of ponticulus posticus were35.04% in the experimental group and 21.09% in the control group. The prevalence between the two groups was statistically significant(P<0.05). No significant difference was found between the prevalence of unilateral and bilateral ponticulus posticus in the two groups(P>0.05). The prevalence of ponticulus posticus in males was significantly higher than that in females in the experimental group(P<0.05). By contrast, the gender difference in the control group was not statistically significant(P>0.05). The prevalence of ponticulus posticus type 1+2 was higher in the experimental group than that in the control group(P<0.05). Conclusion The prevalence of ponticulus posticus in patients with maxillary palatally impacted canine was significantly higher than that in patients with normally erupted canine, with higher prevalence rate in males.