INBDE Practice Exam 2026 – Complete Study Guide

Question: 1 / 1180

What has the best coefficient of thermal expansion for certain applications?

Composite

Gold

Gold has the best coefficient of thermal expansion for certain applications because it closely matches that of natural tooth structure. This characteristic is important in dental applications to minimize the risk of restoration failure due to mismatch in thermal expansion between the restoration material and the tooth. While composites, porcelain, and sodium chloride are also used in dental restorations, they do not have as favorable a coefficient of thermal expansion as gold does.

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Porcelain

Sodium Chloride

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