title: The Use of CAD/CAM Technology for Fabricating Cast Gold Survey Crowns under Existing Partial Removable Dental Prosthesis. A Clinical Report.
abstract: The fabrication of a survey crown under an existing partial removable dental prosthesis (PRDP) has always been a challenge to many dental practitioners. This clinical report presents a technique for fabricating accurate cast gold survey crowns to fit existing PRDPs using CAD/CAM technology. The report describes a technique that would digitally scan the coronal anatomy of a cast gold survey crown and an abutment tooth under existing PRDPs planned for restoration, prior to any preparation. The information is stored in the digital software where all the coronal anatomical details are preserved without any modifications. The scanned designs are then applied to the scanned teeth preparations, sent to the milling machine and milled into full-contour clear acrylic resin burn-out patterns. The acrylic resin patterns are tried in the patient's mouth the same day to verify the full seating of the PRDP components. The patterns are then invested and cast into gold crowns and cemented in the conventional manner.
authors.affiliation: Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL.
authors.forename: Tarek
authors.initials: T
authors.lastname: El Kerdani
authors.affiliation: Department of Restorative Dental Sciences, Division of Prosthodontics, University of Florida College of Dentistry, Gainesville, FL.
authors.forename: Sally
authors.initials: S
authors.lastname: Roushdy
mesh_terms: D000368:Aged; D017076:Computer-Aided Design; D003442:Crowns; D000044:Dental Abutments; D017267:Dental Prosthesis Design; D003832:Denture, Partial, Removable; D006046:Gold; D006801:Humans; D008297:Male
chemical_list: D006046:Gold
keywords: CAD/CAM; cast gold; milled acrylic resin patterns