RPD Review Questions

Answer to Question #183


The correct answer is

Indirect retainers are rests that are located anterior to the retentive arms on distal extension RPDs. They function when dislodging forces attempt to move the denture base away from the basal seat tissues. By preventing downward movement of the anterior portion of the RPD, the indirect retainers force the direct retainers (clasps) to activate when movement away from the basal seat is attempted.