Stripe Wear Ceramic

The average wear volume was 0 4 mm 3 year in the femoral heads.

Stripe wear ceramic.

Has a unique complication of stripe wear occurring from lift off separation of the head gait. Stresses developed during hip articulation with or without the occurrence of component impingement were determined from a global dynamic fe model of tha mechanics. Affatato s 1 traina f toni a. Stripe is a suite of payment apis that powers commerce for online businesses of all sizes including fraud prevention and subscription management.

Microseparation and stripe wear in alumina on alumina hip implants. Affatato tecno ior it the combination of materials that still has highest wear resistance for total hip replacement is ceramic on ceramic. Online payment processing for internet businesses. Acetabular anteversion of less than 15 was associated with an increased wear rate.

The broken ceramic fragments and the ceramic head were sent to a research laboratory and were further analyzed. 1 medical technology laboratory rizzoli orthopedic institute bologna italy. Ceramic bearings have the lowest wear rates of any bearing combination 0 5 to 2 5 µ per component per year ceramic on polyethylene bearings have varied ranging from 0 to 150 µ. The femoral head demonstrated a characteristic stripe wear pattern and the overall volumetric wear rate was high 19 mm 3.

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. The determination of femoral head stripe wear magnitude and ceramic liner fracture propensity involved a multistep approach previously described. Profilometry results show that stripe wear regions have a sub stantially higher surface roughness than the as manufactured ceramic fig. We analyzed 16 retrieved bearings.

Alumina ceramic on ceramic bearings have very low wear rates in standard hip simulators. The regions of wear showed a roughened surface with grain pullout. Moreover regions of metal transfer can be shown to stand proud of the ceramic substrate with surface roughness value roughly equal to those of the stripe wear region fig. However retrieved bearings demonstrate edge loading wear.