The retention in the cast metal restoration is mainly by:: (A) Diverging vertical walls, (B) Parallel vertical walls, (C) Luting cement, (D) All of the above
Answer is D. Cast-metal intracoronal restorations, referred to as inlay restorations, rely on diverging vertical walls that are almost parallel and a luting cement to provide retention of the casting in the tooth.
Sturdevant operative dentistry 7th Edition, Page No:120