INBDE (Integrated National Board Dental Examination) Practice Exam

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Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following materials has the highest linear coefficient of expansion?

Amalgam
Direct gold
Tooth structure
Composite resin

The correct answer is: Composite resin

Composite resin has the highest linear coefficient of expansion among the materials listed. The linear coefficient of thermal expansion measures the change in length of a material in response to a change in temperature. Composite resins have a higher coefficient of thermal expansion compared to other restorative materials like amalgam, direct gold, and tooth structure. This property is important to consider in restorative dentistry to prevent issues such as marginal leakage, restoration failure, and tooth fracture that can occur due to the mismatch in expansion rates between materials and tooth structure.