中国实用口腔科杂志

中国实用口腔科杂志

• 论著 • 上一篇    下一篇

均角型骨性Ⅲ类错牙合拔牙与非拔牙治疗前后硬组织变化比较的研究

白艳洁，孙晓菊，谢 洪   

  1. 辽宁省人民医院口腔科，沈阳110015
  • 收稿日期:2008-04-29 修回日期:2008-05-25 出版日期:2008-06-15 发布日期:2008-06-15

  • Received:2008-04-29 Revised:2008-05-25 Online:2008-06-15 Published:2008-06-15

摘要：

目的 探求均角型骨性Ⅲ类错牙合的最适治疗手段。方法 辽宁省人民医院2000 — 2006年完成的18例均角型骨性Ⅲ类错牙合 患者中，拔牙组10例、未拔牙组8例，治疗前后拍头颅定位侧位片，进行描记、定点、测量，比较13项角度指标和2项线距指标。 结果 未拔牙组SNA、NA-PA、U1-NA、U1-SN角增大，U1-NA距增大，SNB、NP-FH角减小，ANB角增大至正常范围，与矫治前相比差异均有统计学意义（P均 < 0.05）;拔牙组SNA、SNB、U1-NA、U1-SN角减小，ANB角增大至正常范围，与矫治前相比差异均有统计学意义（P < 0.05 或P < 0.01）。结论 均角型骨性Ⅲ类错牙合应优选非拔牙矫治以改善凹陷面型。

关键词: 骨性Ⅲ类错牙合畸形, 头影测量

Abstract:

Comparison of the hard tissue change before and after treatment in patients with extraction and non-extraction of skeletal Ⅲ malocclusion at average GoGn-SN angles. BAI Yan-jie, SUN Xiao-jü, XIE Hong. Department of Stomatology, Liaoning Provincial People’s Hospital, Shenyang 110016, China.
Abstract：Objective To investigate the hard tissue changes of skeletal Ⅲmalocclusion of average GoGn-SN angles before and after treatment with extraction and non-extraction by cephalometric radiographs, and to identify the suitable therapeutic approach for patients with skeletal Ⅲ maloccsion at average MP-SN angles. Methods Ten cases treated by extraction and 8 cases by non-extraction of skeletalⅢ malocclusion at average GoGn-SN angles who completed their treatment processes were included in the study, and pre-trement and post-treatment cephalometric radiographs were performed to determine the changes.Thirteen angular measures and 2 linear measures were statistically analyzed. Results After treatment, the mean values of SNA, NA-PA, U1-SN, U1-NA angle and U1-NA distance in the non-extractive cases were significantly increased， whereas SNB and NP-FH were decreased dramatically, and the value of ANB was increased to the normal range; in contrast, the mean values of SNA, SNB, U1-SN, U1-NA angles were significantly decreased in extractive cases though the ANB was also increased significantly to the normal range. Conclusion Non-extraction is preferred to extraction in treating skeletal Ⅲ malocclusion of average GoGn-SN angle to improve the depressed profile.

Key words: skeletal Ⅲ malocclusion, cephalometrics