单选题
What is the effect of inadequate condensation pressure?

A、

Decreased marginal adaptation

B、

Delayed setting

C、

Increased tensile strength

D、

Reduced gamma-1 phase

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相关试题

单选题 What causes delayed expansion in zinc-containing amalgam?

A、

High mercury content

B、

Poor condensation

C、

Moisture contamination

D、

Overtrituration

单选题 The gamma-2 phase is eliminated in:

A、

High-copper amalgam

B、

Lathe-cut amalgam

C、

Zinc-free amalgam

D、

Conventional low-copper amalgam

单选题 The most corrosion-prone phase in low-copper amalgam is:

A、

Gamma

B、

Gamma 1

C、

Gamma 2

D、

Epsilon

单选题 Which of the following best improves the marginal integrity of amalgam?

A、

Increased mercury content

B、

Immediate polishing

C、

Proper condensation

D、

Delayed carving

单选题 What is the role of zinc in amalgam alloy?

A、

Increases corrosion resistance

B、

Acts as a scavenger for oxygen during manufacturing

C、

Improves esthetics

D、

Strengthens the final restoration

单选题 Which component of dental amalgam is primarily responsible for its strength?

A、

Mercury

B、

Tin

C、

Silver

D、

Zinc

单选题 Over-trituration of amalgam leads to:

A、

Increased working time

B、

Excessive contraction

C、

Shorter setting time and hot mix

D、

Decreased strength

单选题 The function of tin in dental amalgam is to:

A、

Reduce expansion

B、

Increase strength

C、

Control corrosion

D、

Enhance esthetics