Evaluation Of The Fretting Corrosion
Mechanisms On The Head-cone Interface
Of Hip Prostheses
Author(s)
I. Caminha, C. R. M. Roesler, H. Keide, C. Barbosa, I. Abud
& J. L. Nascimento
Abstract
Fretting-corrosion is one of the main concerns in the application of hip
prosthesis. This type of information is very important in the stage of orthopedic
implants design, with the purpose of minimizing the amount of tissue exposed to
corrosion products which are released during the permanence of the prosthesis in
the patient. The residual corrosion products of stainless steels are associated to
the occurrence of several adverse reactions in the human body. The knowledge
about these corrosion products is extremely important in the phase of the project
of hip prostheses, aiming at the minimization of the amount of exposure of the
organic tissues to corrosion products released during the permanence of the
prosthesis inside the patient.
In the present work the mechanical stability and fretting corrosion resistance
of modular hip prosthesis, which was fabricated with ASTM F 138 austenitic
stainless steel, were evaluated according to the criteria of ASTM F 1875
standard, method I, which prescribes long term test, with the purpose of
determining the amount of damage through the quantification of the corrosion
products and debris which resulted from the fretting corrosion conditions. The
mechanical tests were performed in a servohydraulic mechanical testing machine
and the modular interfaces were exposed to an electrolytic 0.9% NaCl in distilled
water solution and subjected to a minimum load of 230 N and a maximum load
Keywords
fretting corrosion, hip prosthesis, modular components, mechanical properties
Related Book
Other papers in this volume
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