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Topographical characterisation of artificial femoral heads- a Benchmarking study

Artikel i vetenskaplig tidskrift
Författare Bengt-Göran Rosén
Ann Wennerberg
Stefan Rosén
Publicerad i Wear
Volym 257
Nummer/häfte 12
Sidor 1275-1280
ISSN 0043-1648
Publiceringsår 2004
Publicerad vid Odontologiska institutionen, Avdelningen för oral protetik/odontologisk materialvetenskap
Sidor 1275-1280
Språk en
Länkar dx.doi.org/10.1016/j.wear.2004.05.0...
Ämneskategorier Biomaterial

Sammanfattning

The main functional demands on artificial joints are that they last more than 20 years. This means optimising the friction coefficient to minimise forces transmitted to the surrounding bone and the wear of the contacting surfaces. Surface roughness has an important influence on friction and wear. Traditionally, the 2D Ra-parameter has been the preferred way to characterise the joint's topography. Today ongoing development of 3D techniques are available for the research, and the aim of the present paper is to highlight the importance and possibilities using high-resolution 3D atomic force microscope ( AFM) and the optical phase-shifting interferometer for texture characterisation of eight commercially available femoral heads. The results show a significant variation of topography and surface-lay for the different femoral heads in the study. The variation and difference between heads were further underlined by the use of different characterisation techniques and measuring strategy. Results highlight the importance of the selection of measurement strategy, parameters, instrumentation, and scale of measurement in order properly to characterise the femoral heads in this study.

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