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[单选题]
肯氏I类缺失,可摘局部义齿修复时,远中基牙设计RPI卡环,其近中支托的作用是()
A.防止基牙龋坏
B.减小基牙上的扭力
C.减轻牙槽嵴负担
D.增强义齿的强度
查看答案
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A.防止基牙龋坏
B.减小基牙上的扭力
C.减轻牙槽嵴负担
D.增强义齿的强度
A.圈形卡环
B.回力卡环
C.对半卡环
D.三臂卡环,远中支托,卡环游离臂在近中
A.固位体选择不当
B.固位体边缘不密合
C.(牙合)力过大
D.固位力不等
E.粘结剂溶解
A.classVechicle:publicBicycle
B.classBicycle:classVechicle
C.classBicycle:publicVechicle
D.classBicycle:publicclassVechicle