ESKA-Ceram(R) is a new material for use in hip endoprostheses, and comprise
s two-thirds polyurethane and one-third Al2O3 ceramic powder. Its wear rate
s are of a similar low order of magnitude as those reported for metal-metal
and ceramic-ceramic combinations. A great advantage of the material is tha
t it permits the production of asymmetrical inserts for acetabular cups.