An in vitro wear study of alumina-alumina total hip prostheses.
Four 28 mm diameter alumina-alumina hip prostheses were tested in the Mkll Durham hip simulator for 5 x 10(6) cycles using 25 per cent bovine serum as lubricant. Wear of the heads and cups was measured gravimetrically. The mean and standard deviation of the wear rate for the alumina cups was 0.097 +/- 0.039 mm3/10(6) cycles. The femoral heads produced such low wear that it could not be measured by weighing but could be detected byincreased surface roughness measurements. Such low wear rates represent about one-five-hundredthof the wear of ultra-high molecular weight polyethylene (UHMWPE) against ceramic in a similar test and supports work which indicates that fluid film lubrication exists in these joints.
Smith
S L
SL
Centre for Biomedical Engineering, University of Durham, UK.
Unsworth
A
A
D000537:Aluminum Oxide; D006622:Hip Prosthesis; D066298:In Vitro Techniques; D008422:Materials Testing; D011095:Polyethylenes; D011474:Prosthesis Design; D013499:Surface Properties; D015040:Zirconium
D011095:Polyethylenes; C111601:ultra-high molecular weight polyethylene; D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide