title: Implant-supported fixed dental prostheses with CAD/CAM-fabricated porcelain crown and zirconia-based framework.
abstract: Recently, fixed dental prostheses (FDPs) with a hybrid structure of CAD/CAM porcelain crowns adhered to a CAD/CAM zirconia framework (PAZ) have been developed. The aim of this report was to describe the clinical application of a newly developed implant-supported FDP fabrication system, which uses PAZ, and to evaluate the outcome after a maximum application period of 36 months. Implants were placed in three patients with edentulous areas in either the maxilla or mandible. After the implant fixtures had successfully integrated with bone, gold-platinum alloy or zirconia custom abutments were first fabricated. Zirconia framework wax-up was performed on the custom abutments, and the CAD/CAM zirconia framework was prepared using the CAD/CAM system. Next, wax-up was performed on working models for porcelain crown fabrication, and CAD/CAM porcelain crowns were fabricated. The CAD/CAM zirconia frameworks and CAD/CAM porcelain crowns were bonded using adhesive resin cement, and the PAZ was cemented. Cementation of the implant superstructure improved the esthetics and masticatory efficiency in all patients. No undesirable outcomes, such as superstructure chipping, stomatognathic dysfunction, or periimplant bone resorption, were observed in any of the patients. PAZ may be a potential solution for ceramic-related clinical problems such as chipping and fracture and associated complicated repair procedures in implant-supported FDPs.
authors.affiliation: Department of Prosthodontics, Showa University School of Dentistry, Tokyo, Japan. mtakaba@dent.showa-u.ac.jp
authors.forename: Masayuki
authors.initials: M
authors.lastname: Takaba
authors.forename: Shinpei
authors.initials: S
authors.lastname: Tanaka
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ishiura
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Baba
mesh_terms: D000368:Aged; D002484:Cementation / Q000379:methods; D017076:Computer-Aided Design; D003442:Crowns; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003779:Denture Design; D003824:Denture, Complete; D003830:Denture, Partial, Fixed; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D008297:Male; D008409:Mastication / Q000502:physiology; D008875:Middle Aged; D016348:Osseointegration / Q000502:physiology; D010984:Platinum / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D016896:Treatment Outcome; D015040:Zirconium / Q000737:chemistry*
chemical_list: D015921:Dental Implants; D003764:Dental Materials; D006047:Gold Alloys; D019279:Resin Cements; D003776:Dental Porcelain; D010984:Platinum; D015040:Zirconium; C028541:zirconium oxide
keywords: CAD/CAM; Dental implants; fixed dental prostheses; porcelain crown; zirconia framework