开放式与闭合式牵引上颌阻生尖牙的锥形束CT研究

发布时间：2018-04-10 06:42

本文选题：锥形束CT　切入点：上颌阻生尖牙　出处：《重庆医科大学》2014年硕士论文

【摘要】：目的：采用开放式与闭合式牵引矫治上颌阻生尖牙(impactedmaxillary canine， IMC)，应用锥形束CT(cone beam computedtomography，CBCT)测量两种方法矫治前后牙根、边缘牙槽骨以及根尖部牙槽骨的变化量，为临床上选择治疗上颌阻生尖牙的开窗方法提供参考。方法：选取在重庆医科大学附属口腔医院正畸科接受CBCT扫描并完成外科正畸联合治疗的29例上颌埋伏阻生尖牙患者,分成2组，外科开窗，一组18例患者共18颗上颌阻生尖牙采用开放式开窗为开放组，另一组11例患者共14颗上颌阻生尖牙采用闭合式开窗作为闭合组，所有患者均采用直丝弓矫治技术进行正畸牵引治疗,对牵引前后上颌阻生尖牙以及对照侧尖牙的牙根，上颌阻生尖牙边缘牙槽骨以及根尖部牙槽骨的变化进行CBCT分析，采用SPSS16.0软件对测量数据进行配对T检验。结果： 1、开放式牵引组和闭合式牵引组的上颌阻生尖牙以及对照侧尖牙矫治前后均有轻度的牙根吸收，但是差异没有统计学意义（P0.05） 2、开放式牵引组唇、腭侧牙槽骨高度与矫治前比较，差异有显著性(p0.05),闭合式牵引组唇、腭侧牙槽骨高度与矫治前比较，差异无显著性(p0.05)，开放式牵引组根尖部唇侧牙槽骨厚度与矫治前比较，差异有显著性(p0.05),开放式牵引组根尖部腭侧牙槽骨厚度与矫治前比较，差异无显著性(p0.05)，，闭合式牵引组根尖部唇、腭侧牙槽骨厚度与矫治前比较，差异无显著性(p0.05)。结论： 1、上颌阻生尖牙采用开放式牵引和闭合式牵引后牙根均有不明显的吸收。 2、上颌阻生尖牙采用闭合式牵引后边缘牙槽骨以及根尖部牙槽骨的吸收量小于开放式牵引组。
[Abstract]:Objective: to measure the changes of anterior and posterior root, marginal alveolar bone and apical alveolar bone of maxillary canine (IMC) in maxillary canine of maxillary canine by open and closed traction, and to measure the changes of root, marginal alveolar bone and apical alveolar bone of maxillary canine by CT(cone beam computed tomographic technique.To provide a reference for clinical choice of maxillary impacted canine fenestration.Methods: a total of 29 patients with impacted maxillary impacted teeth underwent CBCT scanning and surgical orthodontic treatment in Department of Orthodontics, affiliated Stomatology Hospital of Chongqing Medical University, and were divided into 2 groups.In one group, 18 maxillary impacted canines were treated with open fenestration, the other 11 patients with 14 maxillary impacted canines were treated with closed fenestration.All patients were treated by orthodontic traction with straight wire appliance. CBCT analysis was performed on the root of maxillary impacted canine and control canine, the alveolar bone at the edge of maxillary impacted canine and the alveolar bone in the apical region of maxillary impacted canine before and after traction.SPSS16.0 software was used to test the measured data by paired T test.Results:1. The maxillary impacted canines and control canines in open traction group and closed traction group had slight root resorption before and after orthodontic treatment, but the difference was not statistically significant (P 0.05).2. The height of labial and palatine alveolar bone in open traction group was significantly higher than that before orthodontic treatment (P 0.05), and the height of palatine alveolar bone in closed traction group was higher than that before orthodontic treatment.The thickness of labial alveolar bone in open traction group was significantly higher than that before orthodontic treatment, and the thickness of alveolar bone in apical palatine of open traction group was higher than that before orthodontic treatment.There was no significant difference between the two groups (P 0.05). There was no significant difference in the thickness of alveolar bone between the apical lip and palatal alveolar bone in the closed traction group (P 0.05).Conclusion:1. The root absorption of maxillary impacted canine was not obvious after open traction and closed traction.2. The absorption of the alveolar bone and the alveolar bone in the apical region of the maxillary impacted canine was less than that in the open traction group.
【学位授予单位】：重庆医科大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.5

【参考文献】