RPD Review Questions
Incorrect. Guide surfaces (and guide plates) are seldom placed on the buccal or lingual surfaces---the only ones that could curve mesiodistally.
Correct. Guide surfaces and guide plates should follow the natural buccolingual curvature of the tooth.
Incorrect. Guide surface preparations and guide plates should be vertically parallel to the established path of insertion/dislodgement---not curved occluso-gingivally.