TOPIC: COMMON VIVA QUESTION

Q25. Define impression?

Ans. A negative likeness or copy in reverse of the surface of an object; an imprint of the teeth and adjacent structures for use in dentistry.

Q26. Define a dental impression?

Ans. A negative imprint of an oral structure used to produce a positive replica of the structure to be used as a permanent record or in the production of a dental restoration or prosthesis.

Q27. What are the basic objectives of impression making?

Ans. The objectives of impression making are:

1. Preservation of the alveolar ridge
2. Retention
3. Aesthetics
4. Stability
5. Support

Q28. What are the theories in impression making?

Ans. The theories in impression making are:

1. Pressure technique/ functional pressure impression
2. Non-pressure technique/minimal pressure
3. Selective pressure technique