Dental Materials Practice Test

Question 1

Pitting of direct filling old restoration usually results from_________________?

Accepted Answer

C.	Improper stepping of condenser point

Question 2

The cohesive gold used as bulk filler is_____________?

Accepted Answer

B.	Mat gold

Question 3

Chemical tempering in porcelains is done to interrupt crack propagation by______________?

Accepted Answer

C.	Inducing residual compressive strength

Question 4

To prevent porosity in dental porcelain it should be backed________________?

Accepted Answer

B.	In vacuum

Question 5

Pyroplastic flow of porcelain is due to___________________?

Accepted Answer

A.	High temperature during glazing