题目内容
下列关于上颌托制作要求的叙述，错误的是
2021-12-24
A.基托要埋入增力丝
B.上前牙区颌堤边缘在上唇下缘以下露出2mm
C.必须做蜡基托
D.做基托前要填倒凹
E.颌堤宽度前牙区约为6mm
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