Corrosion is the main mechanism of material loss at the taper junction of large head metal on metal hip replacements

Ashley K. Matthies, Radu Racasan, Paul Bills, Anna Panagiotidou, John A. Skinner, Gordon Blunn, Alister J. Hart

Research output: Contribution to journalMeeting Abstract

Abstract

Abstract: Material loss at the head-stem taper junction may contribute to the high early failure rates of stemmed large head metal-on-metal (LH-MOM) hip replacements. We sought to quantify both wear and corrosion and by doing so determine the main mechanism of material loss at the taper. This was a retrospective study of 78 patients having undergone revision of a LH-MOM hip replacement. All relevant clinical data was recorded. Corrosion was assessed using light microscopy and scanning electron microscopy, and graded according to a well-published classification system. We then measured the volumetric wear of the bearing and taper surfaces. Evidence of at least mild taper corrosion was seen in 90% cases, with 46% severely corroded. SEM confirmed the presence of corrosion debris, pits and fretting damage. However, volumetric wear of the taper surfaces was significantly lower than that of the bearing surfaces (p = 0.015). Our study supports corrosion as the predominant mechanism of material loss at the taper junction of LH-MOM hip replacements. Although the volume of material loss is low, the ionic products may be more biologically active compared to the particulate debris arising from the bearing surfaces.
Original languageEnglish
Pages (from-to)13
Number of pages1
JournalOrthopaedic Proceedings
Volume95-B
Issue numberSup 13
Publication statusPublished - 1 Mar 2013

Fingerprint

Corrosion
Hip
Metals
Electron Scanning Microscopy
Microscopy
Retrospective Studies
Head
Light

Cite this

Matthies, Ashley K. ; Racasan, Radu ; Bills, Paul ; Panagiotidou, Anna ; Skinner, John A. ; Blunn, Gordon ; Hart, Alister J. / Corrosion is the main mechanism of material loss at the taper junction of large head metal on metal hip replacements. In: Orthopaedic Proceedings. 2013 ; Vol. 95-B, No. Sup 13. pp. 13.
@article{3e182feda2de4c24b79d03978b8d6506,
title = "Corrosion is the main mechanism of material loss at the taper junction of large head metal on metal hip replacements",
abstract = "Abstract: Material loss at the head-stem taper junction may contribute to the high early failure rates of stemmed large head metal-on-metal (LH-MOM) hip replacements. We sought to quantify both wear and corrosion and by doing so determine the main mechanism of material loss at the taper. This was a retrospective study of 78 patients having undergone revision of a LH-MOM hip replacement. All relevant clinical data was recorded. Corrosion was assessed using light microscopy and scanning electron microscopy, and graded according to a well-published classification system. We then measured the volumetric wear of the bearing and taper surfaces. Evidence of at least mild taper corrosion was seen in 90{\%} cases, with 46{\%} severely corroded. SEM confirmed the presence of corrosion debris, pits and fretting damage. However, volumetric wear of the taper surfaces was significantly lower than that of the bearing surfaces (p = 0.015). Our study supports corrosion as the predominant mechanism of material loss at the taper junction of LH-MOM hip replacements. Although the volume of material loss is low, the ionic products may be more biologically active compared to the particulate debris arising from the bearing surfaces.",
author = "Matthies, {Ashley K.} and Radu Racasan and Paul Bills and Anna Panagiotidou and Skinner, {John A.} and Gordon Blunn and Hart, {Alister J.}",
year = "2013",
month = "3",
day = "1",
language = "English",
volume = "95-B",
pages = "13",
journal = "Orthopaedic Proceedings",
issn = "2049-4416",
publisher = "British Editorial Society of Bone and Joint Surgery",
number = "Sup 13",

}

Corrosion is the main mechanism of material loss at the taper junction of large head metal on metal hip replacements. / Matthies, Ashley K.; Racasan, Radu; Bills, Paul; Panagiotidou, Anna; Skinner, John A.; Blunn, Gordon; Hart, Alister J.

In: Orthopaedic Proceedings, Vol. 95-B, No. Sup 13, 01.03.2013, p. 13.

Research output: Contribution to journalMeeting Abstract

TY - JOUR

T1 - Corrosion is the main mechanism of material loss at the taper junction of large head metal on metal hip replacements

AU - Matthies, Ashley K.

AU - Racasan, Radu

AU - Bills, Paul

AU - Panagiotidou, Anna

AU - Skinner, John A.

AU - Blunn, Gordon

AU - Hart, Alister J.

PY - 2013/3/1

Y1 - 2013/3/1

N2 - Abstract: Material loss at the head-stem taper junction may contribute to the high early failure rates of stemmed large head metal-on-metal (LH-MOM) hip replacements. We sought to quantify both wear and corrosion and by doing so determine the main mechanism of material loss at the taper. This was a retrospective study of 78 patients having undergone revision of a LH-MOM hip replacement. All relevant clinical data was recorded. Corrosion was assessed using light microscopy and scanning electron microscopy, and graded according to a well-published classification system. We then measured the volumetric wear of the bearing and taper surfaces. Evidence of at least mild taper corrosion was seen in 90% cases, with 46% severely corroded. SEM confirmed the presence of corrosion debris, pits and fretting damage. However, volumetric wear of the taper surfaces was significantly lower than that of the bearing surfaces (p = 0.015). Our study supports corrosion as the predominant mechanism of material loss at the taper junction of LH-MOM hip replacements. Although the volume of material loss is low, the ionic products may be more biologically active compared to the particulate debris arising from the bearing surfaces.

AB - Abstract: Material loss at the head-stem taper junction may contribute to the high early failure rates of stemmed large head metal-on-metal (LH-MOM) hip replacements. We sought to quantify both wear and corrosion and by doing so determine the main mechanism of material loss at the taper. This was a retrospective study of 78 patients having undergone revision of a LH-MOM hip replacement. All relevant clinical data was recorded. Corrosion was assessed using light microscopy and scanning electron microscopy, and graded according to a well-published classification system. We then measured the volumetric wear of the bearing and taper surfaces. Evidence of at least mild taper corrosion was seen in 90% cases, with 46% severely corroded. SEM confirmed the presence of corrosion debris, pits and fretting damage. However, volumetric wear of the taper surfaces was significantly lower than that of the bearing surfaces (p = 0.015). Our study supports corrosion as the predominant mechanism of material loss at the taper junction of LH-MOM hip replacements. Although the volume of material loss is low, the ionic products may be more biologically active compared to the particulate debris arising from the bearing surfaces.

M3 - Meeting Abstract

VL - 95-B

SP - 13

JO - Orthopaedic Proceedings

JF - Orthopaedic Proceedings

SN - 2049-4416

IS - Sup 13

ER -