Ahlroos, Tiina

Kuosmanen, Petri

Revitzer, Hannu

Ryti, Oskari

Saikko, Vesa

Aaltodoc

English

The effect of acetabular cup position on wear of a large-diameter metal-on-metal prosthesis studied with a hip joint simulator

Clinically, malposition of the acetabular cup in large-diameter metal-on-metal prosthetic hip designs is associated with high wear, adverse reaction to metal debris and early failure. A steep angle of the cup (&gt;60°) may lead to poor tribological performance. Large-diameter CoCr-on-CoCr prostheses were run in the HUT-4 hip joint simulator so that a steep angle was included. With a correct position, the tribological behaviour was excellent, the wear rate being 0.1 mm3/106 cycles. In the steepest position, lubrication failed and the wear rate was two orders of magnitude higher. This study stresses the importance of rigorous pre-clinical testing

VTT Research System

Vesa Saikko

Tiina Ahlroos

Hannu Revitzer

Oskari Ryti

Petri Kuosmanen

Crossref

Tribology International

Aaltodoc Publication Archive

https://aaltodoc.aalto.fi/bitstream/handle/123456789/20243/A1_saikko_vesa_2013.pdf?sequence=1&isAllowed=y

The effect of acetabular cup position on wear of a large-diameter metal-on-metal prosthesis studied with a hip joint simulator

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VTT Research System

VTT Research System

Crossref

Aaltodoc Publication Archive