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.
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3.0T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 repair residual crowns and roots of anterior teeth with casting post core with metal porcelain crown.
目的探讨利用铸造核桩加金属烤瓷全冠来修复前牙残冠、残根的优点。
Methods: The residual crown and root of large furcation molars by full root-fill were chosen. Then casting anatomy bolt post-core molars are restored with finely casting full crowns.
方法：选择牙根分叉较大的磨牙残冠残根，经完善根管充填后，制作分体栓道式铸造桩核，然后精密铸造金属全冠修复。
Methods Unparalleled insertion of the posts and cores was adopted in the casting of the ceramic crown to repair the residual roots and crowns of the molars.
方法利用铸造法制做不平行就位道桩核，完成对磨牙残根残冠的保存修复。
Objective To investigate the method of enhancing the accuracy of titanium crowns by improving the casting method.
目的通过改进纯钛铸造方法提高钛铸件的精确性。
Methods 290 patients with dental or dentition defect diseases were treated with investment casting, manufactured 380 metal crowns and brackets. 40 of 380 are failure.
方法对290例牙体或牙列缺损患者进行熔模铸造，制作380件金属内冠和支架。
Methods 290 patients with dental or dentition defect diseases were treated with investment casting, manufactured 380 metal crowns and brackets. 40 of 380 are failure.
方法对290例牙体或牙列缺损患者进行熔模铸造，制作380件金属内冠和支架。
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