A predictable all-digital workflow to retrofit a crown to an existing removable prosthesis.

The task of fabricating a new crown under an existing removable partial denture presents challenges for the dentist, technician, and patient. The main concern is accurately communicating the configuration of the rest, retentive clasps, and reciprocal elements to the laboratory technician without temporarily depriving the patient of the prosthesis. A variety of solutions involving stone cast alterations and elastomeric or resin indexes have been used for this task. However, these methods require significant additional time and technique-sensitive work by the operator and technician. More recent approaches using digital technologies require many of these traditional steps, each of which introduces potential inaccuracy and labor cost. This updated approach eliminates the inaccuracies associated with manual manipulation by the technician by leveraging contemporary intraoral scanning technology and a completely digital workflow to predictably and accurately fabricate a crown under an existing prosthesis.