Retrieved Highly Crosslinked UHMWPE Acetabular Liners Have Similar Wear Damage as Conventional UHMWPE
نویسندگان
چکیده
منابع مشابه
Wear of retrieved UHMWPE hip liners.
After the gamma-irradiation sterilization, the most widely used orthopaedic grade polymer bearing liner material for the total joint replacement, ultra-high molecular weight polyethylene (UHMWPE), degrades through the progressive in vivo oxidation. The oxidative degradation makes UHMWPE brittle and leads to reduction of its mechanical properties. In this study, the effect of the in vivo post-ir...
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BACKGROUND The low wear rates of crosslinked polyethylenes provide the potential to use larger diameters to resist dislocation. However, this requires the use of thinner liners in the acetabular component, with concern that higher contact stresses will increase wear, offsetting the benefits of the crosslinking. QUESTIONS/PURPOSES We asked the following questions: Is the wear of conventional a...
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Introduction: Bearing couples within total ankle arthroplasty (TAA) typically utilize cobalt chromium alloys articulating on ultrahigh molecular weight polyethylene (UHMWPE). Articulation of these surfaces during in vivo loading can generate UHMWPE wear particles, which may then result in osteolysis and component loosening [1]. Osteolysis has been observed following TAA in 15-22% of patient pop...
متن کاملWear of Crosslinked Uhmwpe in a Hip Joint Simulator
Crosslinking has been extensively introduced to reduce the wear of UHMWPE. In this study the wear rates and wear surfaces of UHMWPE with different levels of crosslinking were compared in a hip joint simulator. The UHMWPE was either non-irradiated, gamma irradiated in air (2.5MRad), or highly crosslinked (7.5 and 10MRad). The intentionally crosslinked materials showed a significantly lower volum...
متن کاملIn Vivo Lipid Absorption in Highly Cross-linked UHMWPE Acetabular Liners
Introduction Radiation cross-linking was developed in order to improve the wear resistance of UHMWPE in total joint replacements [1]. Oxidationinducing free radicals formed during the irradiation process are eliminated through melting [2]. Without free radicals present, irradiated and melted UHMWPE has been considered oxidatively stable. However, with minor oxidation being observed in this mate...
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ژورنال
عنوان ژورنال: Clinical Orthopaedics & Related Research
سال: 2011
ISSN: 0009-921X
DOI: 10.1007/s11999-010-1552-9