单选题

联合卡环适用于( )。

A单侧个别牙缺失

B单侧牙弓缺失

C前牙缺失

D双侧后牙缺失

E前后牙均有缺失

正确答案

来源:www.examk.com

答案解析

[解析] 联合卡环是由两个卡环通过共同的卡环体连接而成,卡环体位于相邻两基牙的颌外展隙,并与伸向颌面的颌支托相连接,适用于单侧牙弓方缺失,甚至牙冠短而稳固,成相邻两牙之间有间隙者。
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