A casting may fail to seat on the prepared tooth due to all of the following factors except _____.
Temporary cement still on the prepared tooth after the temporary restoration has been removed.
Proximal contact(s) of casting too heavy/tight.
Undercuts present in prepared tooth.
The occlusal of the prepared tooth was underreduced.
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.