Weaker bonds to dentin are caused by one of the reasons that()
A. dentin contains more mineralized tooth structure than enamel
B. dentin contains more water than enamel
C. the smear layer makes wetting by adhesive more effective
D. fluid m the dentin tubulesreduces the stability of the composite resin to dentin bond
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解决钢材腐蚀问题通常采用()方法。
A. 合金防腐、表面包层防腐
B. 不接触空气
“牺牲阳极”保护是()保护两种方法之一。
A. 阴极
B. 阳极