Impression materials can be classified as those that are flexible and those that are rigid at the time of removal from the mouth. A rigid impression material is restricted to applications in areas where undercuts exist.

Question

Quizplus · Accepted Answer

Statement 1 is correct because impression materials can indeed be classified as flexible or rigid. Statement 2 is incorrect because rigid impression materials are not restricted to areas with undercuts; they can be used for any impression, but they are necessary in areas with undercuts to ensure proper removal from the mouth.

Impression Materials Can Be Classified as Those That Are Flexible