Wear of novel ceramic‐on‐ceramic bearings under adverse and clinically relevant hip simulator conditions
نویسندگان
چکیده
منابع مشابه
A simulator study of adverse wear with metal and cement debris contamination in metal-on-metal hip bearings
OBJECTIVES Third-body wear is believed to be one trigger for adverse results with metal-on-metal (MOM) bearings. Impingement and subluxation may release metal particles from MOM replacements. We therefore challenged MOM bearings with relevant debris types of cobalt-chrome alloy (CoCr), titanium alloy (Ti6Al4V) and polymethylmethacrylate bone cement (PMMA). METHODS Cement flakes (PMMA), CoCr a...
متن کامل‘Breakaway’ wear of metal-on-metal bearings in hip simulator studies: In search of the cause
Introduction While clinical reports have been encouraging for metal-on-metal (MOM) hip bearings, some adverse effects have been reported [1]. A puzzling phenomenon has also been observed in hip simulators wherein one or more MOM bearings revealed 2 to 9 fold higher wear than apparently ‘identical’ bearings [2,3]. This phenomenon we termed ‘breakaway wear’ (BA-wear) has yet to be investigated. T...
متن کاملEffect of femoral head size on the wear of metal on metal bearings in total hip replacements under adverse edge-loading conditions
Metal-on-metal (MoM) bearings have shown low-wear rates under standard hip simulator conditions; however, retrieval studies have shown large variations in wear rates and mechanisms. High-wear in vivo has caused catastrophic complications and has been associated with steep cup-inclination angle (rotational malpositioning). However, increasing the cup-inclination angle in vitro has not replicated...
متن کاملFriction measurement in a hip wear simulator.
A torque measurement system was added to a widely used hip wear simulator, the biaxial rocking motion device. With the rotary transducer, the frictional torque about the drive axis of the biaxial rocking motion mechanism was measured. The principle of measuring the torque about the vertical axis above the prosthetic joint, used earlier in commercial biaxial rocking motion simulators, was shown ...
متن کاملInfluence of hip joint simulator design and mechanics on the wear and creep of metal-on-polyethylene bearings
Hip joint simulators are used extensively for preclinical testing of hip replacements. The variation in simulator design and test conditions used worldwide can affect the tribological performance of polyethylene. The aim of this study was to assess the effects of simulator mechanics and design on the wear and creep of ultra-high-molecular-weight polyethylene. In the first part of this study, an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Biomedical Materials Research Part B: Applied Biomaterials
سال: 2013
ISSN: 1552-4973,1552-4981
DOI: 10.1002/jbm.b.32965