传动直丝弓技术矫正骨性Ⅲ类错牙合的疗效分析
Therapeutic effect analysis of skeletal class Ⅲ malocclusion treatment by transmission straight wire technique
作者：程锋, 简志杉, 朱莹, 张纯燕, 胡丽, 陈莉莉
Author：Cheng Feng, Jian Zhishan, Zhu Ying, Zhang Chunyan, Hu Li, Chen Lili
收稿日期：2019-08-15 年卷（期）页码：2020,38(3):301-301-307
期刊名称：华西口腔医学杂志
Journal Name：West China Journal of Stomatology
关键字：骨性Ⅲ类错牙合,传动矫治技术,掩饰性治疗,牙根吸收,
Key words：skeletal class Ⅲ malocclusion,transmission straight wire technique,camouflage treatment,root resorption,
基金项目：湖北省卫生健康委员会创新团队项目(WJ2019C001)
中文摘要
目的 探讨传动直丝弓技术矫正骨性Ⅲ类错牙合畸形的疗效及优势。方法 选择2012年1月—2017年1月因骨性Ⅲ类错牙合就诊于华中科技大学同济医学院附属协和医院口腔医学中心,拒绝手术治疗而采用正畸掩饰性治疗的患者97名进行回顾性研究。根据骨性畸形的程度分为2组:轻中度骨性组（-4°≤ANB角<0°）和重度骨性组（-8°≤ANB角<-4°）,每组按照采用的矫治技术不同又分为2组:传动矫治技术（T组）和MBT矫治技术（M组）。结果 97名患者均已结束治疗。轻中度骨性组:59名患者前牙反均解除,磨牙恢复Ⅰ类关系,面型明显改善,但T组中U1/SN角、L1/MP角、Lip-Diff等指标矫治前后的差值与M组相比差异有统计学意义（P<0.05）,T组与M组相比上下切牙区牙根吸收程度更轻（P<0.05）;重度骨性组:38名患者前牙反解除或基本解除,其中14例出现下颌前牙过度舌倾（M组9名,T组5名）,面型改善不佳。24例矫治结果较理想的患者,T组中U1-NA值、U1/SN角、L1-NB值、L1/MP角、LLP、Lip-Diff等指标矫治前后的差值与M组相比差异有统计学意义（P<0.05）,T组与M组相比上下切牙区牙根吸收程度更轻（P<0.05）。结论 相对于MBT矫治技术,传动力矫治技术在治疗骨性Ⅲ类错牙合患者时,存在可使面型改善更加明显、上下前牙的代偿倾斜度更小、牙根吸收的风险率更低等优势,应用在骨性Ⅲ类错牙合中优势更明显。
英文摘要
ObjectiveThis study aimed to investigate the therapeutic effects and advantages of skeletal class Ⅲ malocclusion treatment by transmission straight wire technique.MethodsNinety-seven patients who received treatment for skeletal class Ⅲ malocclusion at the Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology from January 2012 to January 2017 were selected for this retrospective study. All these patients refused surgery. They were divided into two groups in accordance with the type of skeletal malocclusion: mild-to-moderate skeletal malocclusion group (-4°≤ANB <0 °) and severe skeletal malocclusion group (-8°≤anb<-4°). each of the two groups was divided further into two small groups in accordance with the technique used: t group (transmission straight wire technique) and m group (mbt technique).ResultsThe crossbite of all 59 patients in the mild-to-moderate skeletal malocclusion group was successfully treated. The molars were classified as classⅠrelationship, and the facial profile improved. Significant differences were found in the values of U1/SN angle, L1/MP angle, and Lip-Diff between the T and M groups before and after the treatment (P<0 .05). the extent of incisor root resorption was lighter in the t group than in the m group (P<0 .05). in the severe skeletal malocclusion group, the crossbite of all 38 patients was cured or partially cured. fourteen patients showed severe lower anterior teeth inclination (five in the t group and nine in the m group), and the profiles did not significantly improve. significant differences were observed in the values of u1-na value, u1/sn angle, l1-nb value, l1/mp angle, llp, and lip-diff between the t and m groups before and after the treatment (P<0 .05). the extent of incisor root resorption was lighter in the t group than in the m group (P<0 .05).ConclusionRelative to the MBT technique, the transmission straight wire technique has great advantages in improving facial profile, reducing the compensatory inclination of the upper and lower anterior teeth, and reducing the risk of root resorption in the treatment of skeletal class Ⅲ malocclusion.
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