We refer to this as the "under partial / no partial" case, or stated on your prescription directions, as 'UPNP'. By following the steps outlined below, excellent results can be achieve `and keep your patients smiling.
Step One : Routine prep and impression procedure
Step Two : Making the 'Mini' impression for relation of partial to crown. (*Impression tray and clear margins NOT necessary for this small clasp impression.) (Refer to photo)
* If multiple abutment teeth are to be prepped under partial, follow same procedures as above, injecting impression material around each of the preps, clasps, and rests and seating the partial at one time.
Step Three : Upon receiving your UPNP case, we recreate the clasp and rest area of the patient's partial through means of wire and Duralay to conform to the 'mini' impression. Refer to Photo
Step Four : The under partial crown is waxed to the Duralay clasp, then cast and processed following standard procedures. Contouring of the crown utilizes the pseudo clasp in establishing clasp fit, undercut, and rest areas. Refer to Photo