Failure of hydroxyapatite-coated acetabular cups

Kuo An Lai, Wun Jer Shen, Chyun Hsiang Chen, Chyun Yu Yang, Wen Pin Hu, Guang Liang Chang

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Between March 1990 and May 1991 we performed 85 primary total hip replacements in 74 patients using the Landos Atoll hydroxyapatite (HA)-coated cup and the Corail HA-coated stem. The patients were followed up for a mean of ten years. Of the 85 cups, 26 (31%) have already been revised and a further six are radiologically unstable and awaiting revision. Two femoral stems have been revised for infection without loosening. The retrieved acetabular cups were studied by SEM and image-processing techniques to quantify the amount of residual HA on the cup. This was correlated with the clinical variables and modes of failure. The residual HA (as a percentage of the surface) on the loose cups correlated negatively with the duration of implantation (r = -0.732, p < 0.001). Six cups were stable at revision and had more residual HA coating than those which were loose (p < 0.01). The rate of failure of the Landos Atoll HA-coated, smooth hemispherical cup with screw fixation is unacceptably high. Resorption of the HA coating is markedly increased in loose cups compared with stable cups. HA coating cannot substitute for stable mechanical fixation.

Original languageEnglish
Pages (from-to)641-646
Number of pages6
JournalJournal of Bone and Joint Surgery - Series B
Volume84
Issue number5
DOIs
Publication statusPublished - 2002 Jan 1

Fingerprint

Durapatite
Hip Replacement Arthroplasties
Thigh
Infection

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

Lai, Kuo An ; Shen, Wun Jer ; Chen, Chyun Hsiang ; Yang, Chyun Yu ; Hu, Wen Pin ; Chang, Guang Liang. / Failure of hydroxyapatite-coated acetabular cups. In: Journal of Bone and Joint Surgery - Series B. 2002 ; Vol. 84, No. 5. pp. 641-646.
@article{7e810731885448c0ae403460751e116b,
title = "Failure of hydroxyapatite-coated acetabular cups",
abstract = "Between March 1990 and May 1991 we performed 85 primary total hip replacements in 74 patients using the Landos Atoll hydroxyapatite (HA)-coated cup and the Corail HA-coated stem. The patients were followed up for a mean of ten years. Of the 85 cups, 26 (31{\%}) have already been revised and a further six are radiologically unstable and awaiting revision. Two femoral stems have been revised for infection without loosening. The retrieved acetabular cups were studied by SEM and image-processing techniques to quantify the amount of residual HA on the cup. This was correlated with the clinical variables and modes of failure. The residual HA (as a percentage of the surface) on the loose cups correlated negatively with the duration of implantation (r = -0.732, p < 0.001). Six cups were stable at revision and had more residual HA coating than those which were loose (p < 0.01). The rate of failure of the Landos Atoll HA-coated, smooth hemispherical cup with screw fixation is unacceptably high. Resorption of the HA coating is markedly increased in loose cups compared with stable cups. HA coating cannot substitute for stable mechanical fixation.",
author = "Lai, {Kuo An} and Shen, {Wun Jer} and Chen, {Chyun Hsiang} and Yang, {Chyun Yu} and Hu, {Wen Pin} and Chang, {Guang Liang}",
year = "2002",
month = "1",
day = "1",
doi = "10.1302/0301-620X.84B5.12384",
language = "English",
volume = "84",
pages = "641--646",
journal = "Bone and Joint Journal",
issn = "2049-4394",
publisher = "British Editorial Society of Bone and Joint Surgery",
number = "5",

}

Failure of hydroxyapatite-coated acetabular cups. / Lai, Kuo An; Shen, Wun Jer; Chen, Chyun Hsiang; Yang, Chyun Yu; Hu, Wen Pin; Chang, Guang Liang.

In: Journal of Bone and Joint Surgery - Series B, Vol. 84, No. 5, 01.01.2002, p. 641-646.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Failure of hydroxyapatite-coated acetabular cups

AU - Lai, Kuo An

AU - Shen, Wun Jer

AU - Chen, Chyun Hsiang

AU - Yang, Chyun Yu

AU - Hu, Wen Pin

AU - Chang, Guang Liang

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Between March 1990 and May 1991 we performed 85 primary total hip replacements in 74 patients using the Landos Atoll hydroxyapatite (HA)-coated cup and the Corail HA-coated stem. The patients were followed up for a mean of ten years. Of the 85 cups, 26 (31%) have already been revised and a further six are radiologically unstable and awaiting revision. Two femoral stems have been revised for infection without loosening. The retrieved acetabular cups were studied by SEM and image-processing techniques to quantify the amount of residual HA on the cup. This was correlated with the clinical variables and modes of failure. The residual HA (as a percentage of the surface) on the loose cups correlated negatively with the duration of implantation (r = -0.732, p < 0.001). Six cups were stable at revision and had more residual HA coating than those which were loose (p < 0.01). The rate of failure of the Landos Atoll HA-coated, smooth hemispherical cup with screw fixation is unacceptably high. Resorption of the HA coating is markedly increased in loose cups compared with stable cups. HA coating cannot substitute for stable mechanical fixation.

AB - Between March 1990 and May 1991 we performed 85 primary total hip replacements in 74 patients using the Landos Atoll hydroxyapatite (HA)-coated cup and the Corail HA-coated stem. The patients were followed up for a mean of ten years. Of the 85 cups, 26 (31%) have already been revised and a further six are radiologically unstable and awaiting revision. Two femoral stems have been revised for infection without loosening. The retrieved acetabular cups were studied by SEM and image-processing techniques to quantify the amount of residual HA on the cup. This was correlated with the clinical variables and modes of failure. The residual HA (as a percentage of the surface) on the loose cups correlated negatively with the duration of implantation (r = -0.732, p < 0.001). Six cups were stable at revision and had more residual HA coating than those which were loose (p < 0.01). The rate of failure of the Landos Atoll HA-coated, smooth hemispherical cup with screw fixation is unacceptably high. Resorption of the HA coating is markedly increased in loose cups compared with stable cups. HA coating cannot substitute for stable mechanical fixation.

UR - http://www.scopus.com/inward/record.url?scp=0036327602&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036327602&partnerID=8YFLogxK

U2 - 10.1302/0301-620X.84B5.12384

DO - 10.1302/0301-620X.84B5.12384

M3 - Article

C2 - 12188477

AN - SCOPUS:0036327602

VL - 84

SP - 641

EP - 646

JO - Bone and Joint Journal

JF - Bone and Joint Journal

SN - 2049-4394

IS - 5

ER -