Utilização do poli-éter-éter-cetona (“PEEK”) para infraestruturas de prótese parcial removível: uma revisão de literatura

Abstract

Abstract: Poly-ether-ether-ketone is presented as an aesthetic alternative with good mechanical properties for use in removable partial denture structures. Therefore, the objective of this study was to carry out a literature review to understand the main characteristics of this innovative material in the use of RPD components. A detailed search strategy was performed for the Pubmed database, and the following descriptors were used: “Polyetheretherketone OR PEEK” and “Removable Partial Denture”. Therefore, 23 articles were selected, and among them grouped in the following maintained: Mechanical properties, 12 articles were used; Physical and Surface features (Color/ Brightness/ Roughness), 3 articles were used; Adaptation, 5 articles were used; and Aesthetic perception, 5 articles were used. Through the analyses, it was possible to observe that PEEK has a lower retention property than Co-Cr, but had better resistance to fatigue. About color, brightness and roughness, PEEK proved to have good stability over time and when immersed in different solutions. In addition, its excellent modulus of elasticity allows uniform distribution of loads on the alveolar ridge, ensuring greater protection of the periodontal ligament. Finally, its aesthetic property is a differential when compared to metallic alloys, but there is controversy as to whether this is a relevant point to cause discomfort to the patient. It is concluded that PEEK needs some improvements to become the main material for the structure of prostheses, since its properties are sufficient for clinical use, but inferior to the materials already used. In addition, more research on this component is needed to better understand the influence of different variables on its performance.