45.相較於汞齊，後牙複合樹脂之彈性模數（modulus of elasticity）與彈性變形量（elastic deformation）之敘述，下列何者正確？
(A)具較低的彈性模數，因此彈性變形量較高
(B)具較低的彈性模數，因此彈性變形量較低
(C)具較高的彈性模數，因此彈性變形量較低
(D)具較高的彈性模數，因此彈性變形量較高

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統計： A(443), B(23), C(119), D(26), E(0) #1152439

詳解 (共 2 筆)

#4865213

The following features of present, direct posterior (Class I , II , amd IV) composites are considered disadvantaged (compared with dental amalgum) , some more so than others：

1. Very technique sensitive

2. Higher coefficient of thermal expansion than tooth structure

3. Low modulus of elasticity

4. Biocompatibility of some components unknown

5. Limited wear resistance in high‐stress areas


樹脂相對amalgum的缺點: 技術敏感、高熱膨脹、低彈性係數(彈性好)、生物相容問題、抗摩擦力弱

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#4095759
複合樹酯彈性高，因此具有較低的彈性模數，...
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