Objective: To study clinical importance of casting pile-core crown with negativepressure suction silastic impressions and analyze reasons for the failure of routine impressions in pile-core crown.
目的:探讨铸造桩核冠常规印模过程中失败的原因,研究负压抽吸硅橡胶印模应用于铸造桩核冠的临床意义。
2
The requests for dry-sand, vibrating table, structure of negativepressure sanrl box and proceedings to be noticed in casting pro-cesss have been put forward definitely.