目的：观察分体栓道式铸造桩核在磨牙残冠残根修复中的作用。
Objective: to observe the effect of casting anatomy bolt post-core in restoration of residual crown and root of molars.
目的观察栓体栓道式附着体在牙列缺损患者修复中的应用效果。
Objective To evaluate the clinical effects of the key-key way attachment.
方法：通过对固定桥变异桥体，即栓道式拼接金属桥体的设计、制作与临床应用，观察使用3 ~ 5年后的效果。
Methods: Variant pontic with modified key-way connection was designed, fabricated and used in patients who were followed up for 3 to 5 years to evaluate the effect.
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