上颌第一磨牙纵折后三种固定方法的临床研究

Effect of Three Kinds of Fixation Methods for the Treatment of Maxillary First molar Vertical Fracture

目的比较观察用不同的固定方法保存治疗纵折上颌第一磨牙的临床效果。方法将90例纵折的上颌第一磨牙随机分为三组,用不锈钢丝分别采用牙颈部环绕结扎、冠中部环绕结扎、颈冠双重环绕结扎三种方法进行固定,1w后通过观察牙体、牙龈及结扎丝的状况,比较三种固定方法的临床效果。结果颈冠双重环绕结扎法开裂牙数最少(6.67%),冠中部结扎法的牙龈炎发生率最低(13.33%)。结论颈冠双重环绕结扎固定法在纵折上颌第一磨牙的前期保存治疗过程中效果最佳。

Objective To study three dif erent fixation methods in conservation of first upper molar fracture .Methods 90 cases of molars with fracture were randomly divided into three ligation groups for fixed respectively in temporary-intermediate-restoration, cervical ligation, mid-coronal ligation, cervix-coronal co-ligation, then compare the ef ect according to the condition of tooth, gingiva and ligature wire. Results Fewest dehisence were seen in cervix- coronal co-ligation group and lowest incidence of gingivitis in mid-coronal group. Conclusion Clinical study showed that application of cervix-coronal co-ligation is best in conservation treatment in upper first molar fracture.