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Journal of Long-Term Effects of Medical Implants

Erscheint 4 Ausgaben pro Jahr

ISSN Druckformat: 1050-6934

ISSN Online: 1940-4379

SJR: 0.184 SNIP: 0.485 CiteScore™:: 1.1 H-Index: 39

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Frictional Torque and Wear of Retrieved Hip Prostheses: A Comparison Between Alumina/PE and Co-Cr/PE Prostheses

Volumen 12, Ausgabe 1, 2002, 10 pages
DOI: 10.1615/JLongTermEffMedImplants.v12.i1.40
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ABSTRAKT

Frictional torque and wear were measured in 67 retrieved cups with internal diameters of 32 mm. Thirty cups were combined with alumina heads and 37 were combined with metal heads. A lower prevalence of cup loosening was observed in alumina-polyethylene implants than in metal-polyethylene implants. No relation between frictional torque and stability of implants was detected for either type, whereas retrieved cups of alumina—polyethylene implants showed lower frictional torque than those of metal-polyethylene implants. Less wear was observed in the cups of alumina-polyethylene implants (0.13 mm/y) than in those of metal—polyethylene implants (0.19 mm/y). Less wear was observed in cups without loosening than in those with loosening in both types. These results suggest that wear has a greater influence on the stability of cups than frictional torque.

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