问题 单项选择题

属于封闭区的是()

A.牙槽嵴顶 

B.除硬区外的腭部 

C.下颌磨牙后垫区 

D.切牙乳突 

E.下颌舌隆突

答案

参考答案:C

解析:

 主承托区包括上下颌牙槽嵴顶的区域;副承托区:指上下颌牙槽嵴的唇颊和舌腭侧,(不包括硬区);边缘封闭区:是义齿边缘接触的软组织部分,如粘膜皱襞、系带附丽部、上颌后堤区和下颌磨牙后垫;缓冲区:主要指无牙颌上的上颌隆突、颧突、上颌结节的颊侧、切牙乳突、下颌舌隆突、颌舌骨嵴以及牙槽嵴上的骨尖、骨棱等部位。

完形填空
完形填空。
Dear Bob,
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                                                                                                                                           Wang Jie
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