If an impression were taken with a mercaptan rubber base material of teeth exhibiting severe external undercuts a stone model should be poured

2 explanations

1. 

   mas

   I think the answer is "none of the above" because of undercuts

   • 0
2. 

   oscarj27

   Polysulfide impression materrials can undergo distortion when removed from undercuts. Thus, in case of mercaptan rubber base impression of teeth exhibiting severe external undercuts, the stone model should be poured AFTER 30 MINITES.

   • 1

Only registered users can add explanations