【单选题】
关于前牙贴面唇面的常规牙体预备量，下列说法错误的是()
①
切端约为1.0mm
②
唇面颈1/3处约为0.5mm
③
唇面中1/3处约为0.7mm
④
唇面切1/3处约为0.9mm
⑤
唇面龈边缘为宽0.8mm的肩台
【单选题】
有关禾力与牙组织关系的描述中，说法错误的是（）
①
最大禾力有性别差异
②
最大禾力有年龄差异
③
最大禾力可通过锻炼而增强
④
沿水平向的禾力有利于牙组织
⑤
沿牙体长轴向的禾力有利于牙组织
【单选题】
贴面等微创修复体的牙体预备应尽可能局限于牙釉质内，下列说法错误的是()
①
釉质可为贴面提供固位和抗力支持
②
粘接界面应有50%以上的牙釉质
③
粘接界面边缘应有70%以上位于釉质内
④
粘接界面牙本质少于60%即可
⑤
粘接界面牙本质应为浅层健康牙本质
【单选题】
以下哪项不符合下颌磨牙牙合贴面的牙体预备要求（）
①
牙合面预备时在舌尖制备功能尖斜面
②
舌尖形成0.5mm的无角肩台
③
颊尖形成1.0mm内线角圆钝的肩台或深无角肩台
④
牙合面颊尖牙体预备量1.5mm，舌尖牙体预备量1.0mm
⑤
邻面形成0.5-1.0mm内线角圆钝的肩台或无角肩台
【单选题】
佝偻病的发生是由于缺乏（ ）．
①
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②
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③
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④
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