Alumina-on-alumina hip implants

A wear study of retrieved components

S. Affatato, F. Traina, M. De Fine, S. Carmignato, A. Toni

Research output: Contribution to journalArticle

21 Citations (Scopus)

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 languageEnglish
Pages (from-to)37-42
Number of pages6
JournalJournal of Bone and Joint Surgery - Series B
Volume94 B
Issue number1
DOIs
Publication statusPublished - Jan 2012

Fingerprint

Aluminum Oxide
Hip
Ceramics
Hip Replacement Arthroplasties
Hip Joint
Head
In Vitro Techniques

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 journalArticle

@article{812d3f5d95924c8b932b04e51e2b80f4,
title = "Alumina-on-alumina hip implants: A wear study of retrieved components",
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.",
author = "S. Affatato and F. Traina and {De Fine}, M. and S. Carmignato and A. Toni",
year = "2012",
month = "1",
doi = "10.1302/0301-620X.94B1.26956",
language = "English",
volume = "94 B",
pages = "37--42",
journal = "Journal of Bone and Joint Surgery - Series B",
issn = "0301-620X",
publisher = "British Editorial Society of Bone and Joint Surgery",
number = "1",

}

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.

UR - http://www.scopus.com/inward/record.url?scp=84855528751&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84855528751&partnerID=8YFLogxK

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 -