In vitro testing of Al 2 O 3 –Nb composite for femoral head applications in total hip arthroplasty
Acta Biomaterialia, ISSN: 1742-7061, Vol: 6, Issue: 2, Page: 708-714
2010
- 10Citations
- 1Usage
- 20Captures
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Metrics Details
- Citations10
- Citation Indexes10
- 10
- CrossRef7
- Usage1
- Abstract Views1
- Captures20
- Readers20
- 20
Article Description
Alumina (Al 2 O 3 ) bearings in total hip arthroplasty lead to low wear rates, but catastrophic failure of Al 2 O 3 femoral heads, while rare, remains a concern. In the present work, a composite of Al 2 O 3 and niobium (Nb) was tested in vitro for potential use as an alternative femoral head material in vivo. Dense composite laminates of Al 2 O 3 and Nb were fabricated by hot pressing, and their microstructure and mechanical properties were evaluated. The flexural strength of Al 2 O 3 –Nb laminates in four-point loading was 720 ± 40 MPa, compared with a value of 460 ± 110 MPa for Al 2 O 3. Scanning electron microscopy and X-ray diffraction showed a well-bonded interface between the Al 2 O 3 and Nb without measurable formation of an interfacial reaction phase. The interfacial shear strength between Al 2 O 3 and Nb, measured by a double-notched specimen test, was 290 ± 15 MPa. The feasibility of fabricating prototype femoral heads (32 mm in diameter), consisting of an Al 2 O 3 surface layer (2–3 mm thick) and a Nb core, by hot pressing was shown. The composite femoral head combined the low wear of an Al 2 O 3 articulating surface with the safety of a ductile metal femoral head.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1742706109003110; http://dx.doi.org/10.1016/j.actbio.2009.07.025; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=72049122414&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/19632362; https://linkinghub.elsevier.com/retrieve/pii/S1742706109003110; https://scholarsmine.mst.edu/matsci_eng_facwork/358; https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=1357&context=matsci_eng_facwork; https://dx.doi.org/10.1016/j.actbio.2009.07.025
Elsevier BV
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