• A million cycles on a hip or knee simulator is considered a million steps an average person takes per year. Most test components are simulated up to 5 million cycles or equivalent to 5 years use in the body.
• Hip components when simulated typically have a ‘run-in’ phase followed by a ‘steady-state’ phase; ‘run-in’ usually occurs from 0-to-one million cycles (1Mc) at which it transitions in to ‘steady-state’ as illustrated in the wear graph.
• Hip components once implanted can undergo four (4) individual or combined modes of wear; those being:
• Tribology is the science and technology of interacting surfaces in relative motion. This includes the study and application of the principles of friction, lubrication and wear.
• The word tribology derives from the Greek τριβο (“tribo”) meaning ‘to rub’ and λόγος (“logos”) meaning ‘principle of logic’.
• Sir Robert Charnley was a pioneer and first to introduce a commercially available hip prosthesis for total hip replacement surgery (1969). His original acetabulum liner material was made from polytetrafluoroethylene (PTFE, Teflon) in 1958 which was replaced with ultra high molecular weight polyethylene (UHMWPE) in 1962 which has been marked as the gold standard of today.
• Hip components when simulated typically have a ‘run-in’ phase followed by a ‘steady-state’ phase; ‘run-in’ usually occurs from 0-to-one million cycles (1Mc) at which it transitions in to ‘steady-state’ as illustrated in the wear graph.
• Hip components once implanted can undergo four (4) individual or combined modes of wear; those being:
• Tribology is the science and technology of interacting surfaces in relative motion. This includes the study and application of the principles of friction, lubrication and wear.
• The word tribology derives from the Greek τριβο (“tribo”) meaning ‘to rub’ and λόγος (“logos”) meaning ‘principle of logic’.
• Sir Robert Charnley was a pioneer and first to introduce a commercially available hip prosthesis for total hip replacement surgery (1969). His original acetabulum liner material was made from polytetrafluoroethylene (PTFE, Teflon) in 1958 which was replaced with ultra high molecular weight polyethylene (UHMWPE) in 1962 which has been marked as the gold standard of today.
Spine Simulator Please contact us at biomedicalsystems@shorewestern.com for your requirements. We pride ourselves on customizing both our load frames and knee simulators to meet the need of total spine disc replacement and any medical device testing for spine application. |