When is it indicated to use a survey crown on an abutment tooth?

Using a survey crown on an abutment tooth is particularly indicated when the existing restoration is large and deep. This situation typically arises when the tooth has undergone significant alteration due to caries or previous restorative work, which can complicate the retention of a removable partial denture (RPD). A survey crown provides a solid foundation that can improve the overall alignment and support of the partial denture, helping to ensure that it remains stable and functional.

Additionally, a survey crown allows the dentist to manipulate the contours of the crown to enhance the survey line, optimizing the path of insertion and ensuring better fit and comfort of the RPD. When the restoration is large and deep, it can interfere with the proper placement of retention elements essential for the successful retention of the removable partial denture, making the survey crown an essential choice to ensure both aesthetics and function in the oral environment.