68 posterior teeth wich vertical fracture,were ligated annularly,and undergone root canal therapy and resin filling.

用结扎外固方法,对68个纵折后牙行根管治疗术,树脂充填,全冠修复。

The relapse of orthodontically rotated teeth can be a serious problem in occlusal stability after orth-odontic treatment.

扭转牙复发是正临床治疗后牙稳难题之。

To measure the palatal vault in buccal area,which may be helpful to make preadjustment of palatal bar.

研究正后牙段腭弓形态规律,为临床预成腭杠制作提供理论基础。

Objective:To appraise the obturation capability of bonded vertically fractured posterior tooth using 3 different detin adhesive by microleakage tests and scan electron microscopy(SEM) observation.

通过染料渗透实验和扫描电镜观察对三种牙本质粘结剂粘结离体纵折后牙进行微渗漏测试，评价其封闭能。