Endodontically treated teeth as abutments

occlusal rest (Fig. 5, B), and guiding planes (Fig. 5, C). If there are voids or irregularities, they are filled with monomer and powder with a paint brush. 9. Try-in the removable partial denture (Fig. 6) to ensure a proper adaptation of the resin coping (Fig. 7). The die spacer can be removed from the tooth with a cotton pellet soaked in die spacer thinner. Rinse the tooth several times before cementing the temporary restoration. 10. Transfer the resin coping to the working stone die and finish the margins with wax (Fig. 8). If the surface of the resin coping is not smooth, paint it with a thin layer of liquid wax (Hi-Glass liquid wax glaze, George Taub Products and Fusion Co., Inc., Jersey City, N.J.) before investing and casting. There is little need for an opposing cast because the coping has all the details of the previous cast crown or tooth before preparation; but an opposing model can be used to verify occlusal relationships. 11. Cast, polish, and finish the casting. At the try-in stage, the margins and the occlusion are secured. Finally, adaptation of the RPD to the new crown is appraised (Fig. 9). Cement the crown when all necessary adjustments have been made.