Objective: the purpose of this study was to investigate the application and clinical significance of taking dental impression with an improved method.
前言：目的：探讨一种改良核桩根管取模法的应用及临床意义。
Objective: the purpose of this study was to investigate the application and clinical significance of taking dental impression with an improved method.
前言：目的：探讨一种改良核桩根管取模法的应用及临床意义。
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