11/29/2023 0 Comments Fatigue effects with peek material![]() ![]() NSIF PEEK PEEK implants biomaterial fatigue assessment strain energy density theory of critical distances. The specimens were further polished using different grit sand. Herein, a new fatigue design method based on a local approach is proposed for PEEK implant, and the results are compared with those obtained using the two main biomaterial design approaches available in literature, i.e., the theory of critical distances (TCD) and the notch stress intensity factor (NSIF) approach. Fatigue specimens were machined using a CNC lathe to produce a cylindrical dog-bone shape with the gage diameter of 6.35 mm and gage length of 18 mm following ASTM E606-04 standard. The study was conducted on a neat PEEK polymer. To this aim, previously published datasets of PEEK-notched specimens are used, and the proposed method is reported to provide more accurate results and to be robust for different notch geometries. Experimental design, materials and methods. ![]() Herein, a new fatigue design method based on a local approach is proposed for PEEK implant, and the results are compared with those obtained using the two main biomaterial design approaches available in literature, i.e., the theory of critical distances (TCD) and the notch stress intensity factor (NSIF) approach. ![]() All of the orthopaedic applications contain stress concentrations (notches) in their design however, little work has been done to examine the fatigue behavior of PEEK in the presence of a notch. The improvements in monotonic and FCP behavior of PAN CFR PEEK is attributed to a compound effect of inherent fiber properties, increased fiber number for an equivalent wt reinforcement, and fiber aspect ratio. To assure its reliability in these applications where notches and other stress concentrators weaken implants resistance, a design tool for assessing its tensile and fatigue behaviour in the presence of geometrical discontinuities is highly claimed. Poly(ether-ether-ketone) (PEEK) has been used as a load bearing orthopaedic implant material with clinical success. Pitch CFR PEEK exhibited FCP behavior similar to unfilled PEEK, and neither material was appreciably affected by annealing. Among them, polyetheretherketone (PEEK) has gained wide interest in load-bearing applications due to its yielding behaviour and its superior corrosion resistance. Objectives To investigate the retentive force of a novel clasp design for PEEK ther- moplastic material at 3 different undercut depths with fatigue cycling equivalent to 3 years of insertion. In recent years, the need of surgical procedures has continuously increased and, therefore, researchers and clinicians are broadly focusing on the development of new biocompatible materials. The studies included in this review concluded that CFR-PEEK material performs well in orthopedic implants. and 200 nm PTFE powder in PEEK makes the lowest wear of all specimens, no synergistic effect was found when Al2O3 and PTFE were filled into PEEK composite together. ![]()
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