问题
单项选择题
有防止食物嵌塞作用的卡环是()
A.圈形卡环
B.延伸卡环
C.连续卡环
D.联合卡环
E.倒钩卡环
答案
参考答案:D
解析:
联合卡环通过相邻基牙的外展隙,并有
支托位于基牙的边缘嵴,因此可以防止食物嵌塞。
有防止食物嵌塞作用的卡环是()
A.圈形卡环
B.延伸卡环
C.连续卡环
D.联合卡环
E.倒钩卡环
参考答案:D
解析:
联合卡环通过相邻基牙的外展隙,并有
支托位于基牙的边缘嵴,因此可以防止食物嵌塞。
根据上面信息内容,判断下列各句正(T),误(F)。 | ||||
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