固定矫治器结合小平板治疗重度前牙深覆

Treatment of deep anterior overbite by using the fixed appliances in conjunction with a small bite plate

目的探讨打开重度前牙深覆的有效方法。方法对２９名Ⅲ°前牙深覆患者采用固定矫治器结合小平板进行治疗研究。结果以单纯固定矫治器相比，其打开咬合快，平均每月打开咬合为２．０４±０．７８ｍｍ。打开咬合时间短，为３．９４±１．５５月。两者差异有高度显著性（Ｐ＜０．００１）。使用本方法，成年组和少年组间差异无显著性（Ｐ＞０．０５）。成年患者和少年患者同样有效。结论本法是治疗咬合过紧、龈距离过短、后牙锁、后牙牙槽高度不足等以常规方法不易奏效的深覆病例的有效方法。

Objective This study was to investigate the effective method in the reduction of deep anterior overbite. Methods Twenty nine cases of three degree deep anterior overbite were treated by using the fixed appliances in conjunction with a small bite plate. Results It was showed that this method was significantly quicker to reduce deep overbite of anterior teeth (2.04±0.78mm per month) and shorter to require the time of treatment (3.94±1.55 months) than that by using the single fixed appliances ( P <0.001), and there was no significant difference between the adults and juveniles. These findings suggest that it was effective for both of adult and juvenile patients. Conclusion As the destruction of molar tubes, wire and bracket bonding failure caused by bite were less happened, it was effective to treat complicated cases of deep overbite with a shorter occlusogingival distance, posterior cross bite and not enough alveolar highness of posterior teeth who could be difficult to treat by a routine method.