A stress-releasing intracoronal attachment for extension base removable partial dentures.

Intracoronal retainer systems incorporated into splinted abutment restorations help force distribution. The additional torque introduced by the extension-based removable partial denture is applied over multiple abutments rather than to single abutment teeth. A fixed-removable prosthesis is proposed as a solution to this situation. The Thompson dowel nonlocking semiprecision attachment system is the intracoronal retainer of choice for distal extension denture bases. It allows controlled rotation or stress relief of the removable component by minimizing detrimental transfer of traumatic forces to the abutment teeth. The design and fabrication of the manufactured version of this retainer system is described.