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Fatigue effects with peek material9/7/2023 ![]() ![]() It distributes the applied load and transfers it to the bone, reducing stress-shielding effects and prolong the bone-prosthesis system life span. A special fatigue test was designed to evaluate the elastic behavior and long-term form stability of cylindrically shaped PEEK specimens of 4, 5 and 6mm in diameter, using 11 different PEEK materials of various grades: unfilled, filled with titanium dioxide or barium sulfate powder, reinforced with short carbon fibers or short glass fibers, and. This study evaluated the fatigue limits of PEEK and the effects of the low elastic modulus PEEK in relation to existing dental implants. For all fatigue tests under fully-reversed multi-block loadings, pre-loading was found to have a significant beneficial effect on PEEK fatigue resistance irrespective to the load sequence. The numerical result show that the carbon/PEEK composite material (configuration I) seems to be a good solution to increase the values of fatigue safety factor of coating layers due to highest fatigue life and fatigue safety factor. Polyetheretherketone (PEEK) material is a polycyclic. increasing the test frequency generally resulted in longer fatigue lives for PEEK, while a minimal effect of tensile mean strain was observed. The carbon/PEEK composite material with 0, +45, -45, and 90 degrees fiber orientation (configuration I) has the highest fatigue life and fatigue safety factor. PEEK also has a low coefficient of friction, making it a slick material easing. The fatigue safety factor for the coated implant is increased more than 12.73% at least compared to the uncoated implant. performance in fatigue strength, wear-resistance fatigue resistance. Fatigue life durations are calculated based on the Goodman mean-stress fatigue theory. In contrast, the titanium abutments concentrated the plastic deformation at the internal connection of the dental implant. The cyclic loads are applied on the prosthesis head. A 3D finite element models of hip implants, femur, coating layers with polymeric (PEEK) and composite (carbon/PEEK) coating materials are created for FEA. In addition, PEEK has one excellent hydrolysis. It is a semi-crystalline material having a melting point around 335 C. This study aims to validate, using finite element analysis (FEA), the design concept by comparing the fatigue behavior of hip implant stems coated with composite (carbon/PEEK) and polymeric (PEEK) coating materials corresponding to different human activities: standing up, normal walking and climbing stairs under dynamic loadings to find out which of all these models have a better performance in the prosthesis-bone systems. Why PEEK Excellent fatigue, stress-crack, and creep resistance Very low moisture absorption Remarkable inertness Excellent electrical properties Radiation. The very good mechanical properties are also due to a excellent creep resistance and fatigue resistance approved. synthesis route for PEEK is the reaction between 4,40-difluorobenzophenone and the disodium salt of hydroquinone in a polar solvent at 300 C. ![]()
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