可摘式磨牙颊向竖直器矫正下颌第2磨牙舌倾

目的　设计一种矫正器和相应的矫正方法 ,用以矫正下颌第 2磨牙舌倾。方法　先在患牙上装戴一焊有舌侧扣的带环 ,再将预先制作好的带颊侧牵引钩的下颌可摘式磨牙颊向竖直器装戴就位 ,然后在舌侧扣与矫正器的牵引钩之间使用乳胶弹力圈对患牙进行颊向牵引。待患牙扶正后再使用固定矫正器进行精细调整。结果　使用该方法矫正 3例患者 ,皆在 2个月内将舌倾的下颌第 2磨牙完全竖直。结论　可摘式磨牙竖直器及其使用技术 ,是矫正下颌磨牙舌倾的有效方法。

Uprighting of Lingual Inclined Lower Second Molars by Removable uprighter

Objective To design one kind of removable appliance to upright lingual inclined lower second molars. Methods One band with a lingual button was bonded on the crown of lingual inclined lower second molar, then a removable, uprighter was put on, the tipping molar was uprighted by using buccal traction force produced by the latex elastics between the button and the hook of removable uprighter. Results Three cases had been treated successfully within 2 months. Conclusion Removable uprighter might be an effectiveappliance to upright lingual inclined lower second molars.