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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