A casting may fail to seat on the prepared tooth due to all of the following factors except _____.: (A) Temporary cement still on the prepared tooth after the temporary restoration has been removed., (B) Proximal contact(s) of casting too heavy/tight., (C) Undercuts present in prepared tooth., (D) The occlusal of the prepared tooth was underreduced.
Answer is D. Occlusal reduction would not affect the ability to seat a casting. However, temporary cement, heavy proximal contacts, or tooth undercuts could keep the casting from seating completely.