正畸治疗中磨牙的拔除和保留(五) 悬吊竖直法矫治下颌磨牙阻生

Suspension And Erection of Lower Impacted Molar

目的：探讨下颌磨牙低位近中、水平阻生的矫治方法和效果。方法：采用直丝弓矫治器，在阻生磨牙近中相邻磨牙带环上焊接悬吊竖直簧，对14例下颌第三磨牙，6例下颌第二磨牙共30个阻生磨牙（其中水平阻生12个、近中阻生18个）进行牵引竖直。结果：阻生磨牙均被快速竖直，排齐整平后纳入治疗系统。竖直磨牙时间1～5个月，平均3个月。X线片显示阻生磨牙周围牙槽骨生长、恢复良好。结论：悬吊竖直法能高效、快速、简便地竖直低位阻生磨牙，并具有同期矫治（不延长矫治期），有效增强支抗和竖直支抗磨牙的优点。

Objective：To study treatment method of horizontally impacted and mesioangularly impacted lower molar erection. Method： 30 impacted molars（12 horizontal impaction and 18 mesionangular impaction） were treated with suspension and erection. Result： All impacted molars were erected quickly and brought into treatment system. Erection time was 1-5 months, average being 3 months. Panoramic radiograps showed that periodontal health of impacted molars periphery was good.Conclusion： The method of suspension and erection can quickly and conveniently erect lower impacted molars and have merits of synchronizational treatment,reinforced anchorage and erection of anchorage molar.