Because the Thermal Expansion of a Restorative Material Usually Does

question 6

Multiple Choice

Because the thermal expansion of a restorative material usually does not match that of the tooth structure, a differential expansion or contraction occurs that may result in leakage of oral fluids between the restoration and tooth.

• A) Statement 1 is correct; statement 2 is correct.
• B) Statement 1 is correct; statement 2 is incorrect.
• C) Statement 1 is incorrect; statement 2 is correct.
• D) Statement 1 is incorrect; statement 2 is incorrect.

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Definitions:

Environmental Movement

A diverse scientific, social, and political movement for addressing environmental issues and advocating for the protection of the environment through changes in public policy and individual behavior.

Exxon Valdez

The name of an oil tanker that caused one of the most devastating environmental disasters in history when it spilled millions of gallons of oil in Prince William Sound, Alaska, in 1989.

Acceptable Perils

Risks or dangers that are deemed tolerable within certain contexts or activities, often evaluated in terms of potential benefits.

Normal Accidents

A theory that suggests complex systems are vulnerable to failures and disasters due to their inherent complexity and tight coupling.