Ceramic Stripe Wear

Stripe wear regions are distinguished by large numbers of ceramic grains having been removed from the ceramic matrix leaving a surface that is very rough with faceted pits fig.

Ceramic stripe wear.

However retrieved bearings demonstrate edge loading wear. Alumina ceramic on ceramic bearings have very low wear rates in standard hip simulators. I love a retro striped tee. The average wear volume was 0 4 mm3 year in the femoral heads.

Designed for extreme wear resistance this kevlar filled nylon 6 6 material lasts up to 20 times longer than unfilled nylon. Retrieved heads from ceramic on ceramic bearing couples sometimes have a long narrow area of damage which has been called stripe wear. Factors causing stripe wear including obesity and cup malpositioning also involve increased risk of ceramic liner fracture and merit heightened concern. Will you wear horizontal stripes in the future.

Ceramic strips were also offered as components for sale. Ceramic strips continued to be used on some 7000 series instruments until the mid 1970s and plug ins until the early 1990s. The museum has a ceramic strip demonstration kit and a 1959 brochure. Click on the image to view the pdf.

Since no cup coating was found in these early generations of ceramic bearings component migration was common. This pattern is only seen in the early stages of ceramic on ceramic wear as a result of line contact between the head and the edge of the liner. Ceramic on ceramic coc articulations were developed as an alternative bearing to conventional metal on polyethylene mop bearings in order to decrease bearing surface wear and hopefully increase. I think of it as a basic classic pattern.

This is a preview of subscription content log in to check access. Stripe wear has been reported in many ceramic on ceramic hip replacement retrievals and microseparation separation of the femoral head from the acetabular cup has been proposed as one suggested. And it s easy to wear if you want to make an outfit a little more fun.