| 摘要: |
| ［摘要］ 目的 基于锥形束CT（CBCT）探讨上颌埋伏前牙牙根弯曲度与唇腭侧骨皮质的相关性。方法 收集2018年1月至2022年12月贵州医科大学附属口腔医院正畸科接诊的71例上颌前牙埋伏阻生患者的临床资料，年龄7～13岁，其中埋伏尖牙39颗，埋伏切牙32颗，均采用闭合式间歇轻力牵引治疗。根据Nolla的方法将埋伏切牙分为早期牙龄组（10颗）和晚期牙龄组（10颗）。应用Dolphin软件测量牙根长度、牙根弯曲度、根尖至唇侧骨皮质距离、根尖至腭侧骨皮质距离，采用Pearson相关性分析探讨各指标间的相关性。结果 矫治前尖牙牙根夹角与根尖至唇腭侧骨皮质距离相关性不显著(P>0.05)；切牙牙根夹角与根尖至腭侧骨皮质距离呈正相关（P<0.05），与根尖至唇侧骨皮质距离呈负相关（P<0.05）。矫治后，切牙牙根长度及牙根夹角均大于矫治前，差异有统计学意义（P<0.05）。切牙矫治前后的牙根夹角变化值与根尖至唇侧骨皮质距离变化呈负相关（r=-0.690，P=0.001），与根尖至腭侧骨皮质距离变化呈正相关性（r=0.645，P=0.015）。早期牙龄切牙矫治后的牙根夹角及牙根长度显著大于矫治前（P<0.05），晚期牙龄切牙矫治后的牙根夹角及牙根长度与矫治前比较差异无统计学意义（P>0.05）。结论 埋伏切牙的牙根弯曲度及牙根长度与根尖至唇、腭侧骨皮质的距离具有相关性。 |
| 关键词: 埋伏前牙 唇侧骨皮质 腭侧骨皮质 牙根弯曲 牙根长度 相关性 |
| DOI：10.3969/j.issn.1674-3806.2023.06.13 |
| 分类号:R 783.5 |
| 基金项目:贵州卫生健康委基金项目（编号：gznkj2011-1-042）；贵阳科技基金项目（编号：［2019］9-7-5） |
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| Correlation between root curvature of impacted anterior maxillary teeth and labial and palatal bone cortex based on CBCT |
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TANG Yun, GAO Juan, PENG Ju-xiang, et al.
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College of Stomatology of Guizhou Medical University, Affiliated Stomatology Hospital of Guizhou Medical University, Guiyang 550004, China
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| Abstract: |
| ［Abstract］ Objective To investigate the correlation between root curvature of impacted anterior maxillary teeth and labial and palatal bone cortex based on cone beam computed tomography(CBCT). Methods The clinical data of 71 patients with impacted anterior maxillary teeth who were admitted to the Department of Orthodontics of Affiliated Stomatology Hospital of Guizhou Medical University from January 2018 to December 2022 were collected, aged 7-13 years old, including 39 impacted canines and 32 impacted incisors. All the patients were treated with closed intermittent light traction. According to Nolla′s method, the impacted incisors were divided into early tooth age group(10 teeth) and late tooth age group(10 teeth). The Dolphin software was used to measure the length of the root, the curvature of the root, the distance between the root tip and the labial bone cortex, and the distance between the root tip and the palatine bone cortex. Pearson correlation analysis was used to explore the correlation between the indexes. Results There was no significant correlation between the angle of the root and the distance from the root tip to the labial-palatine cortex before corrective treatment(P>0.05). The angle of the incisor root was positively correlated with the distance from the apical tip to the palatal cortex(P<0.05), and negatively correlated with the distance from the apical tip to the labial cortex(P<0.05). After corrective treatment, the root length and root angle of the incisors were greater than those before corrective treatment, the differences were statistically significant(P<0.05). The changes of the root angle were negatively correlated with the changes of the distance between the root tip and the labial cortex(r=-0.690, P=0.001), and were positively correlated with the distance between the root tip and the palatal cortex(r=0.645, P=0.015) before and after the treatment of the incisor teeth. The root angle and root length of early incisor teeth after corrective treatment were significantly greater than those before treatment(P<0.05), but there were no statistically significant differences in the root angle and root length of late incisor teeth after corrective treatment(P>0.05). Conclusion Root curvature and root length of the impacted incisors are correlated with the distance from the root tip to the labial and palatal bone cortices. |
| Key words: Impacted anterior teeth Labial bone cortex Palatal bone cortex Root curvature Root length Correlation |
