PEEK Material in Terms of Biomechanics and its use in Single Implant Prosthesis: A Review

The aim of the study was to perform a review on biomechanics behavior of polyetheretherketone (PEEK) on prosthetic component of single unit dental implant including abutment, screw and crown. Electronic search was performed on PUBMED using combination of the following search terms: PEEK, Polyetheretherketone, BioHPP, FEA, FEM, Finite element, Stress, Mechanical properties, Dental implant, Abutment, Implant abutment. The search period spanned from 2012 to 2022, 158 results were found, 25 studies were selected. The findings reported fracture strength, failure mode and finite element analysis (FEA) in singleunit implant prosthesis; abutment, crown and screw. Fracture analysis of abutment and crown shown that the failure mode and means of the fracture strength varied between materials however they could be considered to have fracture strengths suitable for clinical application. In FEA show that the use of PEEK crown reduces the stress on itself and could reduce stress transfer to the implant surrounding bone. Contrary, PEEK screw shown significant inferior results compare to Titanium screw. Indication for the use of PEEK as implant abutment and crown is suitable for clinical application. However, PEEK screw is still questionable and should be considered carefully. Further, clinical trials comparing are needed to strengthen the evidence.