传动直丝弓技术矫正骨性Ⅲ类错 的疗效分析

Translated title of the contribution: Therapeutic effect analysis of skeletal class Ⅲ malocclusion treatment by transmission straight wire technique

Feng Cheng, Zhishan Jian, Ying Zhu, Chunyan Zhang, Li Hu, Lili Chen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Objective This study aimed to investigate the therapeutic effects and advantages of skeletal class Ⅲ malocclusion treatment by transmission straight wire technique. Methods Ninety-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). Results The 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). Conclusion Relative 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.

Translated title of the contributionTherapeutic effect analysis of skeletal class Ⅲ malocclusion treatment by transmission straight wire technique
Original languageChinese (Traditional)
Pages (from-to)301-307
Number of pages7
JournalHua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology
Volume38
Issue number3
DOIs
StatePublished - 1 Jun 2020
Externally publishedYes

Keywords

  • camouflage treatment
  • root resorption
  • skeletal class Ⅲ malocclusion
  • transmission straight wire technique

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