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

两种托槽对转矩控制影响的比较研究

田 军1，柳忠豪1，刘利苹1，武传君1，张 丁2   

  1. 烟台市口腔医院正畸科
  • 收稿日期:2009-04-01 修回日期:2009-05-15 出版日期:2009-06-15 发布日期:2009-06-15

  • Received:2009-04-01 Revised:2009-05-15 Online:2009-06-15 Published:2009-06-15

摘要：

目的 研究在同一牙弓中牙齿相互作用条件下， 0.56 mm × 0.71 mm（0.022英寸× 0.028英寸）国产奥杰全程式托槽与日本OPA-K金属托槽在转矩控制方面是否有差异。方法 通过Typodont水浴实验，模拟临床矫治过程，测量结束弓丝为0.48 mm × 0.64 mm （0.019英寸× 0.025英寸）SS方丝时使用两种品牌托槽的上颌 [5 5]　　 的唇舌向倾斜度，并通过数学编程计算转化为上颌 [5 5]　　 的转矩余隙角ψ，对其绝对值进行配对t检验。结果 结束弓丝为0.48 mm × 0.64 mm （0.019英寸× 0.025英寸）SS方丝时，OPA-K金属托槽的转矩余隙角ψ的绝对值为（4.834±2.846）°，奥杰全程式金属托槽的转矩余隙角ψ的绝对值为（4.469±3.213）°，两种托槽间的差异无统计学意义（P = 0.309）。结论 0.56 mm × 0.71 mm（0.022英寸× 0.028英寸）的 OPA-K金属托槽和奥杰全程式托槽在转矩

控制方面无差异，临床上使用这两种托槽均可达到满意的转矩控制。

关键词: 托槽, 转矩, Typodont实验, 牙齿相互作用

Abstract:

Objective To compare the effect of two kinds of brackets （OPA-K and ORJ metal brackets）on torque control when teeth are interacted in the same arch. Methods After the upper arch was aligned and leveled in Typodont study，the inclinations of upper teeth [5 5]　　 were measured when 0.56 mm × 0.71 mm OPA-K metal brackets and 0.56 mm × 0.71 mm ORJ brackets were filled with 0.48 mm × 0.64 mm SS. The inclinatons of each tooth were transformed to the absolute values of the torque play angle ψ by computing program，and paired-t test was used. Results The two kinds of brackets had no statistical significance on torque control when the brackets were filled with 0.48 mm × 0.64 mm SS;the absolute values of the angle ψ in 0.56 mm × 0.71 mm OPA-K metal brackets and 0.56 mm × 0.71 mm ORJ metal brackets were 4.834° ± 2.846° and 4.469° ± 3.213° respectively. There was no statistical significance between the two kinds of brackets. Conclusion There is no difference between 0.56 mm × 0.71 mm OPA-K metal bracket and 0.56 mm × 0.71 mm ORJ metal bracket on torque control;both of the two kinds of metal brackets can provide satisfying torque control.

Key words: bracket, torque, Typodont study, teeth interaction