試題詳解

2.下列專有名詞的解釋，何者正確？
(A)attrition: pathological wearing away of tooth structure secondary to a chemical agent.
(B)abrasion: loss of tooth structure caused by a non-bacterial chemical process.
(C)demastication: tooth wear accelerated by chewing an abrasive substance between opposing teeth.
(D)perimolysis: loss of tooth structure caused by a mechanical process.