![]() ![]() Although PEEK is becoming widespread in clinical practice, only a few studies are available focusing on the use of this material for CAD-CAM prostheses. Compared to rigid framework materials such as zirconium oxide and metal alloys, PEEK has a low modulus of elasticity of 4 GPa, and is as elastic as bone, providing a cushioning effect and reduction of stresses transferred to the abutment teeth. PEEK is a material with high biocompatibility, good mechanical properties, high temperature resistance, chemical stability, polishability, good wear resistance, low plaque affinity and high bond strength with veneering composites and luting cements. It has been also used for the manufacturing of dental implants, implant abutments, healing abutments and occlusal splints. Polyetheretherketone (PEEK) is a linear, aromatic, semi-crystalline thermoplastic, high performance polymer recently used in dentistry as a framework material for metal-free fixed dental prostheses, removable dental prostheses, implant-supported fixed prostheses, implant-retained overdentures, endocrowns and resin bonded fixed dental prostheses. The rapid evolution of computer-aided design and computer-aided manufacturing (CAD-CAM) technology led to the introduction of new materials that could be precisely milled for the fabrication of dental prostheses. Due to the scarcity of clinical data, clinical trials are needed to assess the long-term performance of PEEK prostheses. ![]() PEEK could be considered as a viable alternative for CAD-CAM fixed and removable dental prostheses to well-established dental materials. However, only a few clinical studies were identified. PEEK was additionally recommended for occlusal splints, intra-radicular posts, implant abutments, customized healing abutments and provisional restorations. The use of PEEK has been recommended for a wide range of CAD-CAM fabricated fixed and removable dental prostheses. ResultsĪ great number of in vitro studies are available in the current literature pointing out the noticeable properties of PEEK. Review articles and the references of the included publications were searched to identify relevant articles. Both in vivo and in vitro studies in English were eligible. The search period spanned from January 1990 through February 2020. MethodsĮlectronic database searches were performed using the terms “PEEK”, “CAD-CAM”, “dental”, “dentistry” to identify studies related to the use of PEEK for the fabrication of CAD-CAM prostheses. The purpose of this study was to review the current published literature on the use of PEEK for the fabrication of dental prostheses with CAD-CAM techniques. One of these materials is polyetheretherketone (PEEK), a high performance polymer recently used in dentistry with favorable physical, mechanical and chemical properties. Advanced computer-aided design and computer-aided manufacturing (CAD-CAM) technology led to the introduction of an increasing number of machinable materials suitable for dental prostheses. ![]()
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