Abstract
Alumina-alumina bearings are among the most resistant to wear in total hip replacement. Examination of their surfaces is one way of comparing damage caused by wear of hip joints simulated in vitro to that seen in explanted bearings. The aim of this study was to determine whether second-generation ceramic bearings exhibited a better pattern of wear than those reported in the literature for first-generation bearings. We considered both macro- and microscopic findings. We found that long-term alumina wear in association with a loose acetabular component could be categorised into three groups. Of 20 specimens, four had 'low wear', eight 'crescent wear' and eight 'severe wear', which was characterised by a change in the physical shape of the bearing and a loss of volume. This suggests that the wear in alumina-alumina bearings in association with a loose acetabular component may be variable in pattern, and may explain, in part, why the wear of a ceramic head in vivo may be greater than that seen after in vitro testing.
| Original language | English |
|---|---|
| Pages (from-to) | 37-42 |
| Number of pages | 6 |
| Journal | Journal of Bone and Joint Surgery - Series B |
| Volume | 94 B |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2012 |
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ASJC Scopus subject areas
- Surgery
- Orthopedics and Sports Medicine
Cite this
Alumina-on-alumina hip implants : A wear study of retrieved components. / Affatato, S.; Traina, F.; De Fine, M.; Carmignato, S.; Toni, A.
In: Journal of Bone and Joint Surgery - Series B, Vol. 94 B, No. 1, 01.2012, p. 37-42.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Alumina-on-alumina hip implants
T2 - A wear study of retrieved components
AU - Affatato, S.
AU - Traina, F.
AU - De Fine, M.
AU - Carmignato, S.
AU - Toni, A.
PY - 2012/1
Y1 - 2012/1
N2 - Alumina-alumina bearings are among the most resistant to wear in total hip replacement. Examination of their surfaces is one way of comparing damage caused by wear of hip joints simulated in vitro to that seen in explanted bearings. The aim of this study was to determine whether second-generation ceramic bearings exhibited a better pattern of wear than those reported in the literature for first-generation bearings. We considered both macro- and microscopic findings. We found that long-term alumina wear in association with a loose acetabular component could be categorised into three groups. Of 20 specimens, four had 'low wear', eight 'crescent wear' and eight 'severe wear', which was characterised by a change in the physical shape of the bearing and a loss of volume. This suggests that the wear in alumina-alumina bearings in association with a loose acetabular component may be variable in pattern, and may explain, in part, why the wear of a ceramic head in vivo may be greater than that seen after in vitro testing.
AB - Alumina-alumina bearings are among the most resistant to wear in total hip replacement. Examination of their surfaces is one way of comparing damage caused by wear of hip joints simulated in vitro to that seen in explanted bearings. The aim of this study was to determine whether second-generation ceramic bearings exhibited a better pattern of wear than those reported in the literature for first-generation bearings. We considered both macro- and microscopic findings. We found that long-term alumina wear in association with a loose acetabular component could be categorised into three groups. Of 20 specimens, four had 'low wear', eight 'crescent wear' and eight 'severe wear', which was characterised by a change in the physical shape of the bearing and a loss of volume. This suggests that the wear in alumina-alumina bearings in association with a loose acetabular component may be variable in pattern, and may explain, in part, why the wear of a ceramic head in vivo may be greater than that seen after in vitro testing.
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U2 - 10.1302/0301-620X.94B1.26956
DO - 10.1302/0301-620X.94B1.26956
M3 - Article
VL - 94 B
SP - 37
EP - 42
JO - Journal of Bone and Joint Surgery - Series B
JF - Journal of Bone and Joint Surgery - Series B
SN - 0301-620X
IS - 1
ER -