Abstract
The impact of femoral head surface roughness on wear of γ-irradiation sterilized (3 MRad in nitrogen, crosslinked) and nonsterilized (not crosslinked) UHMWPE acetabular cups has been evaluated. Gravimetric wear testing was performed in a hip joint simulator for 2 × 106 cycles. CoCrMo heads were used with different surface roughness (Ra = 15 nm and Ra = 400 nm). The surface roughness after wear test was unchanged for the roughened heads, whereas the initially smooth heads showed a few scratches. The roughened heads increased the wear of the acetabular cups 2-fold. The γ-irradiated cups tested against rough heads underwent the highest wear. The absorption of water was highest for the γ-irradiated cups (0.0204% compared to 0.0031% after 85 days). Raman spectroscopy showed small but significant crystallinity changes in the wear zone, where the γ-irradiated cups with the most extensive abrasion increased in crystallinity, whereas the nonsterilized cups underwent a crystallinity decrease.
| Original language | English |
|---|---|
| Pages (from-to) | 1032-1042 |
| Number of pages | 11 |
| Journal | Journal of Biomedical Materials Research - Part A |
| Volume | 90 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Sep 15 2009 |
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Keywords
- Crystallinity
- Gamma-irradiation
- Raman spectroscopy
- Roughness
- UHMWPE acetabular cups
ASJC Scopus subject areas
- Biomedical Engineering
- Biomaterials
- Ceramics and Composites
- Metals and Alloys
Cite this
Effect of head surface roughness and sterilization on wear of UHMWPE acetabular cups. / Jedenmalm, A.; Affatato, S.; Taddei, P.; Leardini, W.; Gedde, U. W.; Fagnano, C.; Viceconti, M.
In: Journal of Biomedical Materials Research - Part A, Vol. 90, No. 4, 15.09.2009, p. 1032-1042.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of head surface roughness and sterilization on wear of UHMWPE acetabular cups
AU - Jedenmalm, A.
AU - Affatato, S.
AU - Taddei, P.
AU - Leardini, W.
AU - Gedde, U. W.
AU - Fagnano, C.
AU - Viceconti, M.
PY - 2009/9/15
Y1 - 2009/9/15
N2 - The impact of femoral head surface roughness on wear of γ-irradiation sterilized (3 MRad in nitrogen, crosslinked) and nonsterilized (not crosslinked) UHMWPE acetabular cups has been evaluated. Gravimetric wear testing was performed in a hip joint simulator for 2 × 106 cycles. CoCrMo heads were used with different surface roughness (Ra = 15 nm and Ra = 400 nm). The surface roughness after wear test was unchanged for the roughened heads, whereas the initially smooth heads showed a few scratches. The roughened heads increased the wear of the acetabular cups 2-fold. The γ-irradiated cups tested against rough heads underwent the highest wear. The absorption of water was highest for the γ-irradiated cups (0.0204% compared to 0.0031% after 85 days). Raman spectroscopy showed small but significant crystallinity changes in the wear zone, where the γ-irradiated cups with the most extensive abrasion increased in crystallinity, whereas the nonsterilized cups underwent a crystallinity decrease.
AB - The impact of femoral head surface roughness on wear of γ-irradiation sterilized (3 MRad in nitrogen, crosslinked) and nonsterilized (not crosslinked) UHMWPE acetabular cups has been evaluated. Gravimetric wear testing was performed in a hip joint simulator for 2 × 106 cycles. CoCrMo heads were used with different surface roughness (Ra = 15 nm and Ra = 400 nm). The surface roughness after wear test was unchanged for the roughened heads, whereas the initially smooth heads showed a few scratches. The roughened heads increased the wear of the acetabular cups 2-fold. The γ-irradiated cups tested against rough heads underwent the highest wear. The absorption of water was highest for the γ-irradiated cups (0.0204% compared to 0.0031% after 85 days). Raman spectroscopy showed small but significant crystallinity changes in the wear zone, where the γ-irradiated cups with the most extensive abrasion increased in crystallinity, whereas the nonsterilized cups underwent a crystallinity decrease.
KW - Crystallinity
KW - Gamma-irradiation
KW - Raman spectroscopy
KW - Roughness
KW - UHMWPE acetabular cups
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UR - http://www.scopus.com/inward/citedby.url?scp=68249152033&partnerID=8YFLogxK
U2 - 10.1002/jbm.a.32161
DO - 10.1002/jbm.a.32161
M3 - Article
C2 - 18671264
AN - SCOPUS:68249152033
VL - 90
SP - 1032
EP - 1042
JO - Journal of Biomedical Materials Research - Part A
JF - Journal of Biomedical Materials Research - Part A
SN - 1549-3296
IS - 4
ER -