Methods Casting clasp samples of five cobalt-chromium alloys and one 18-8 nickel-chromium alloy were made from prefabricated clasp wax by invesing,casting,sandblasting,and ultrasonic cleaning.

• 方法 成品磨牙铸造卡环蜡经包埋、铸造、喷砂、超声波清洗后制得 5种钴铬合金和 1种 18 8镍铬不锈钢铸造卡环试件。