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

扭转的复发是正治疗后稳定性的难题之一。

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

研究正病人后段腭弓形态的规律,为预成腭杠的制作提供理论基础。

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质粘结剂粘结离体纵折后进行微渗漏测试，评价其封闭性能。