Picture of two heads

Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Knoop microhardness anisotropy of the ovine radius

Riches, Philip and Everitt, Nicola and McNally, Donal (2000) Knoop microhardness anisotropy of the ovine radius. Journal of Biomechanics, 33 (12). pp. 1551-1557. ISSN 0021-9290

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The Knoop indenter has been used to characterise fully the Knoop microhardness (HK) anisotropy of compact bone. 2120 indentations were performed on mature ovine radii and a linear relationship was found between H K and the angle between the major diagonal of the indenter and the lamella boundaries (p@0.001). HK increased significantly with ash fraction (p@0.001), but decreased with atmospheric vapour pressure (p(0.05). A significant interaction was found between ash fraction and atmospheric vapour pressure (p(0.01). HK significantly varied with indentation position along the diaphysis and around the cortex (both p@0.001), however radial variation in H K was not statistically significant. The variation of ash fraction showed similar trends. These data show that HK varies similarly to Vickers microhardness, but in addition, can provide clear information on the anisotropy of Haversian bone without the need for excising many different indentation planes. A large number of indentations are required to obtain low type I and type II errors in the statistical analysis.