介绍了离心铸造磨球的工艺，以及转速、内浇口断面积计算方法和影响工艺过程的因素。
The technology of grinding ball by centrifugal casting, the rotational speed, the method for calculation of ingate area and factors influencing technological process were introduced.
目的：探讨铸造金属桩核在后牙牙体大面积缺损修复中应用的临床疗效。
Objective: to investigate the effect of cast post and core on the restoration of premolars and molars of extensive loss.
目的对比钴铬合金、低钛合金及镍铬合金3种贱金属合金铸造冠，在3.0 T及1.5 T磁共振成像检查时，产生金属伪影的最大面积及伪影涉及的扫描层数。
Objective To investigate the influence of three dental alloys casting crowns on the artifacts of MRI imaging during the examination of 3.0T MRI and 1.5T MRI.
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