三种矫治器治疗安氏Ⅱ类2分类对切牙牙根吸收的影响

doi:10.13591/j.cnki.kqyx.2022.04.005

摘要/Abstract

摘要： 目的比较不同矫治器治疗安氏Ⅱ类2分类错牙合畸形患者切牙牙根的吸收状况。方法选择使用不同矫治器的安氏Ⅱ类2分类成年患者30例,其中传统MBT托槽、自锁托槽以及无托槽隐形矫治器的患者各10例,共计240颗切牙。收集患者治疗前后的锥形束CT(CBCT)影像学资料,并导入Dolphin Imaging软件,Mimics软件以及3-Matics软件测量分析治疗前后切牙牙根吸收情况。结果传统MBT托槽组和自锁托槽组的上下颌中切牙以及侧切牙的牙齿长度(L)与无托槽隐形矫治器组上下颌中切牙及上颌侧切牙的牙齿长度治疗后较治疗前显著减小,差异具有统计学意义。使用无托槽隐形矫治器的患者下颌侧切牙治疗前后的牙齿长度无显著变化。而三组之间的对比,上下颌中切牙牙齿长度变化无显著统计学差异。无托槽隐形矫治器组上下颌侧切牙的牙齿长度减少量相对更低,差异具有统计学意义(P＜0.05)。此外,无托槽隐形矫治器组平均牙齿长度变化为(-0.37±0.11)mm,显著小于传统MBT托槽组(-1.32±0.47)mm及自锁托槽组(-1.05±0.38)mm。在牙根吸收区域的比较上,各组均表现为腭侧吸收多于唇侧吸收,近中吸收多于远中吸收。结论无托槽隐形矫治器治疗安氏Ⅱ类2分类错牙合畸形可有效降低切牙牙根吸收严重程度。

关键词: 安氏Ⅱ类2分类, 矫治器, 牙根吸收, 切牙

Abstract: Objective To evaluate root resorption of incisors from adult patients with Class Ⅱ division 2 malocclusion treated with three different orthodontic appliances. Methods Thirty patients were selected, including 10 cases treated with conventional MBT appliances, 10 cases with self-ligating appliances and 10 patients with clear aligners. In total, 240 incisors were researched. Cone beam computed tomography (CBCT) data were collected and imported into Dolphin Imaging software, Mimics and 3-Matics software to measure and analyze root variables of incisors pre- and post-treatment. Results The average tooth length(L) showed significant decrease after treatment for all maxillary and mandibular incisors in conventional MBT appliance group, self-ligating appliance group and central incisors, maxillary lateral incisors in clear aligner group. No significant decrease in mandibular lateral teeth average length were observed in clear aligner group. No statistically significant difference in tooth length of maxillary or mandibular central incisors was observed among three groups. In contrast, the reduction of maxillary and mandibular lateral incisors length in the clear aligner group was significantly lower(P＜0.05). The least average length reduction was found in clear aligner group (-0.37±0.11)mm, which was significantly lower than conventional MBT appliancegroup, (-1.32±0.47)mm and self-ligating group, (-1.05±0.38)mm.In addition, the three groups showed a higher prevalence of palatal and proximal resorption than labial and distal resorption. Conclusion Using clear aligners for treatment of Class Ⅱ division 2 malocclusions can effectively reduce severity of incisor root resorption.

Key words: Class Ⅱ division 2, orthodontic appliance, root resorption, incisor

中图分类号:

R783.5

陈宏裕, 管兆兰, 李根, 王华, 孙雯, 张卫兵. 三种矫治器治疗安氏Ⅱ类2分类对切牙牙根吸收的影响[J]. 口腔医学, 2022, 42(4): 309-314.

CHEN Hongyu, GUAN Zhaolan, LI Gen, WANG Hua, SUN Wen, ZHANG Weibing. Analysis of incisor root resorption during orthodontic treatment of Class Ⅱ division 2 malocclusion with three different appliances[J]. Stomatology, 2022, 42(4): 309-314.

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