Objective: To evaluate the clinical of using prefabricated cylindrical root canal pin to lengthen the clinical crown and restoring anterior tooth and premolar defect with PFM.

目的：评价应用预成圆柱形根管钉对前牙牙体缺损患者冠再接后烤瓷修复体的临床效果。

youdao

Using the root of the characteristic equation, this paper studies the asymptotic solution of the characteristic equation of the open circular cylindrical thin shells.

本文利用特征方程根的性质，研究了开口圆柱薄壳精确微分方程的特征方程的渐近解。

youdao