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.

Dual Jaw Treatment of Edentulism Using Implant‐Supported Monolithic Zirconia Fixed Prostheses

“…28 More recent developments in prosthetic rehabilitation of endosseous implants include the use of CAD/CAM for planning and manufacture of monolithic zirconia prostheses. [14][15][16][17] High strength of monolithic zirconia combined with the lack of dissimilar interfaces through which chipping might occur seems promising in overcoming this frequently occurring complication as well as in reducing the costs associated with frequent maintenance visits needed as a result of these technical complications. 16 However, the longevity of treatment modalities based on monolithic zirconia prostheses is yet to be recognized.…”

“…Fixed options for implant-based rehabilitation of the edentulous patient have been documented for both maxillary and mandibular arches, 9,10 with a variety of opinions impacting the implant number, position, and distribution within each arch. These prostheses can be implant-supported fixed denture prosthesis (ISFDP) or hybrid prostheses (with metal frame work and resin), 11 multi-unit ceramo-metal restorations, 12 CAD/CAM-based restorations with metal or zirconia frameworks, [13][14][15] or monolithic zirconia implant-supported fixed prostheses. 16,17 The aim of this case report is to describe the clinical and technical procedures involved in fabrication of maxillary and mandibular implant-supported fixed prostheses using monolithic zirconia (ZirkonZahn GmbH, Gais, Italy), where the occlusal surfaces and incisal edges were kept in monolithic zirconia, and veneering porcelain was applied only on the facial surfaces.…”

Survey of UK dentists regarding the use of CAD/CAM technology

“…1 The demand for aesthetic and metal-free restorations has led to the development of high strength ceramics in dentistry, 2,3 which may only be used in conjunction with CAD/CAM technology. [4][5][6][7] The ability to provide same day chair-side restorations 8,9 with these materials is also attractive to both patient and dentist. Following on from the success of CAD/CAM in the fabrication of crown and bridgework, CAD/CAM was incorporated into the production of implant abutments and frameworks in the 1990s 10 and it has also shown to be reliable in constructing implant abutments, crowns and superstructures.…”

Wear and Microhardness of Three Different Types of CAD/CAM Ceramic Materials

“…The three types have representatives as CAD/CAM blocks. (22,23) Hybrid ceramic combines resin resiliency with colour and strength of the ceramic materials. Vita Enamic is a commonly used fully sintered CAD/ CAM hybrid ceramic.…”