A comparison of structural and mechanical properties in cancellous bone from the femoral head and acetabulum
2004 (English)In: Proceedings of the Institution of mechanical engineers. Part H, journal of engineering in medicine, ISSN 0954-4119, Vol. 218, no 6, 425-429 p.Article in journal (Refereed) Published
Mechanical interlock obtained by penetration of bone cement into cancellous bone is critical to the success of cemented total hip replacement (THR). Although acetabular component loosening is an important mode of THR failure, the properties of acetabular cancellous bone relevant to cement penetration are not well characterized. Bone biopsies (9 mm diameter, 10 mm long) were taken from the articular surfaces of the acetabulum and femoral head during total hip replacement. After mechanical and chemical defatting the two groups of bone specimens were characterized using flow measurement, mechanical testing and finally serial sectioning and three-dimensional computer reconstruction. The mean permeabilities of the acetabular group (1.064 × 10-10 m2) and femoral group (1.155 × 10-10 m2) were calculated from the flow measurements, which used saline solution and a static pressure of 9.8 kPa. The mean Young's modulus, measured non-destructively, was 47.4 MPa for the femoral group and 116.4 MPa for the acetabular group. Three-dimensional computer reconstruction of the specimens showed no significant differences in connectivity and porosity between the groups. Results obtained using femoral head cancellous bone to investigate bone cement penetration and fixation are directly relevant to fixation in the acetabulum. © IMechE 2004.
Place, publisher, year, edition, pages
2004. Vol. 218, no 6, 425-429 p.
Cancellous bone, Cementation, Permeability, Total hip replacement
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-45586DOI: 10.1243/0954411042632081OAI: oai:DiVA.org:liu-45586DiVA: diva2:266482