Headlines
Back > In brief
Oneortho Medical qualifies its unicompartmental knee prostheses.
To avoid implanting total knee prostheses when the arthrosis phenomena which handicap the patients are only localised, Oneortho Medical has developed unicompartmental knee prostheses. The company located in Saint-Genis-Laval (Rhône, France) called on Cetim in order to qualify these new products. The goal was to check the fatigue and wear resistance of the chromium-cobalt and polypropylene components of the prostheses before their release to market. “Our fixed condyles underwent several fatigue tests at 200 daN for 5 million cycles”, explained Théo Vidal, Oneortho Medical Quality Manager. “None of these tests led to any particular failure.” Two wear tests were then performed on two prostheses placed side by side, based on standard ISO 14243:2014. The results validate the wear performance of the polyethylene of the prostheses. Finally, additional tests were performed in accordance with the requirements of standard NF EN ISO 9227:2012 in order to determine the neutral salt spray corrosion resistance of passivated and non-passivated chromium-cobalt bases. The parts did not exhibit any signs of corrosion after 1,000 hours of testing. “These good results were obtained in record time, thanks to the complementarity of Cetim’s teams”, Théo Vidal went on to add.
The reference sheet “Well-qualified medical prostheses” explaining the achievement made for our customer, Oneortho Medical, can be consulted on the Cetim.fr website in the “Services” section, “References” space.
Other informations
- Cegelec CEM selects AFT/Fathom to optimise its nuclear cooling systems Optimising the sizing and design of nuclear equipment cooling systems requires appropriate high...
- The European project EASI-Stress is launched ! Residual stress is easy with the EASI-Stress project! The general objective of the European pro...
- An International index for ISO 128. The ISO 128 series of standards has been given a makeover. Indeed, some parts of the standard a...
- A 1D simulation tool for Getinge Lancer. With the help of a calculation tool requiring no expert knowledge in hydraulics, developed by C...
- Duplication of a Renault wear test bench. At the request of Renault, Cetim has duplicated a test bench for the characterisation of fricti...
