上海口腔医学

上海口腔医学 ›› 2017, Vol. 26 ›› Issue (1): 115-117.doi: 10.19439/j.sjos.2017.01.025

• 论著 • 上一篇    下一篇

NiTi单力偶辅弓伸长伴龈下龋损前磨牙的临床研究

秦飞, 马晓晴, 徐培成   

  1. 上海市徐汇区牙病防治所,上海 200031
  • 收稿日期:2016-01-29 修回日期:2016-03-14 出版日期:2017-02-25 发布日期:2017-03-20
  • 通讯作者: 马晓晴,E-mail：mxq780927@163.com
  • 作者简介:秦飞（1965-）,男,学士,主治医师,E-mail: 475491422@qq.com

Clinical study of premolar extrusion with subgingival decayed defect by one-couple orthodontic NiTi auxiliary arch

QIN Fei, MA Xiao-qing, XU Pei-cheng   

  1. Shanghai Xuhui District Dental Center. Shanghai 200031, China
  • Received:2016-01-29 Revised:2016-03-14 Online:2017-02-25 Published:2017-03-20

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摘要： 目的 研究NiTi单力偶辅弓伸长伴有龈下龋损的前磨牙的效果。方法 选择邻面龋损达龈下2 mm以上的患者30例,第一前磨牙18例,第二前磨牙12例。将同侧第一磨牙、第二磨牙稳定连接后,设计单力偶矫治力系,利用NiTi节段辅弓进行牵引。使用 SPSS 8.0 软件包对所得数据进行t检验。结果 所有患牙龋损最底端均达龈上1 mm,向移动的距离为2.6~4.1 mm。牵引结束后,冠根比例为1.24±0.30,龈沟深度为（1.87±0.28）mm。患牙长轴与同侧第一磨牙长轴之间的交角在治疗前、后无显著差异（P>0.05）,支抗牙咬合关系保持稳定。结论 NiTi单力偶辅弓可精确有效地牵引伸长伴有龈下龋损的前磨牙,该力系对支抗牙的影响较小。

关键词: 龈下龋损, 单力偶, 辅弓, 牵引伸长

Abstract: PURPOSE: To evaluate the effect of one-couple orthodontic NiTi auxiliary arch on the premolar extrusion which had subgingival decayed defect. METHODS: A total of 30 cases with subgingival decayed defects over 2 mm under the proximal gingival margin were chosen including 18 first premolars and 12 second premolars. The first and second molars on the same side were connected steadily and the one-couple orthodontic force system was designed. The NiTi segmental arch was used to extrude the teeth. Student's t test was performed with SPSS 8.0 software package. RESULTS: All the defect margins were 1mm over the gingival margins and the extrusion distance was 2.6~4.1 mm. After extrusion, the crown-root ratio was 1.24±0.30, the depth of the gingival sulcus was 1.87±0.28 mm. There was no significant difference before and after treatment in the angle between the axis of the extruded teeth and that of the first molar (P>0.05). The anchorage teeth kept almost the same relationship with the opposite. CONCLUSION: One-couple orthodontic NiTi auxiliary arch could extrude the premolars with subgingival decayed defects effectively and precisely. The designed force system had little effect on the anchorage teeth.

Key words: Subgingival decayed defect, One-couple, Auxiliary arch, Extrusion

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