上层设计有各种类型的卡环，与基牙直接接触并将各基牙连成一个整体，起固位、卡抱的作用，维持义齿的稳定。
All kinds of clasps are designed on the upper base, which contact with each abutment directly for the function of retention and clasping and stabilize the denture.
上层设计有各种类型的卡环，与基牙直接接触并将各基牙连成一个整体，起固位、卡抱的作用，维持义齿的稳定。
All kinds of clasps are designed on the upper base, which contact with each abutment directly for the function of retention and clasping and stabilize the denture.
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