Dental materials for preparation mcqs

Q.  Back pressure porosity can be avoided by________________?

a. Using asbestos linear
b. Placing the sprue at least one quarter inch away form the end of casting ring
c. Preventing rapid heating the investment in burnout oven
d. Using a short and wide sprue


ANSWER: See Answer
 
No explanation is available for this question!
 

    Discussion

Post your comment / Share knowledge