A new measurement technique of prosthesis wear by microscratching has been demonstrated. The technique has been applied in a study of the backside wear of a UHMW polyethylene tibial insert of a rotating platform knee prosthesis. Four disc-shaped UHMW polyethylene plugs, prepared with 5-µm deep microscratches, were carefully recessed into the backside of the tibial insert. It was demonstrated that the scratches are not affected by creep under static load.
Lui, Y., Warner, J., Gladkis, L., SCARVELL, J., Smith, P., & Timmers, H. (2013). Microscratching Characterization of the Wear-in of UHMW Polyethylene in Prostheses. Tribology Letters, 49(2), 439-450. https://doi.org/10.1007/s11249-012-0087-5