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直丝弓矫治技术

2009-03-14 08:18:00海峡名医网admin查看次数：1354

　直丝弓矫治器是在方丝弓矫治器的基础上改进

于20世纪70年代由Andrews设计

其主要特点是在矫治器的预成托槽上

根据不同牙齿的解剖位置

加入了一定角度

由于牙齿生长在牙床里

牙弓内不同形状的牙齿排列成牙弓形态

不同牙齿都有各自的三维方向的倾斜角度

所以方丝弓矫治器的方丝上需弯制相应的角度才能插入托槽

按预定的方向移动

方丝弓托槽上的槽沟和底板是垂直的和底板边缘也是平行

没有角度

牙齿的角度依靠在方弓丝上弯制的第1

第2

第3常规序列弯曲达到

而直丝弓矫治器将牙的角度预置在托槽和颊管上

消除了在弓丝上弯制各种弯曲

用一根有基本弓型的平直弓丝插入托槽

就可以完成牙齿的唇舌向

近远中方向以及控根移动

治疗结束时

最后完成的弓丝也完全平直

所以简称为直丝弓矫治器或称为预置矫治器

　　
　　直丝弓矫治器的托槽是矫治器的关键部件

而且是专牙专用

用托槽定位牙齿

即所希望达到的牙齿位置

包括近远中的倾斜

唇(颊)舌向倾斜

以及内侧

外侧位置都包括在托槽之内

因而不像方丝弓矫治器那样在弓丝上弯制3种序列弯曲

大大简化了方丝弓矫治器临床操作程序

而且避免了因弓丝弯制误差造成的牙齿往返移动

使牙齿定位更精确

迅速

节省了就诊时间

疗程也缩短

是临床上应用最广的高效能固定矫治技术

因而直丝弓的闻世

深受正畸医生的欢迎

近年来较广泛应用于正畸临床

由标准方丝弓技术发展到了直丝弓技术

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直丝弓矫治技术

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