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Excellent long-term results of the Müller acetabular reinforcement ring in primary total hip arthroplasty.

Sirka, Aurimas; Clauss, Martin; Tarasevicius, Sarunas; Wingstrand, Hans LU ; Stucinskas, Justinas; Robertsson, Otto LU ; Emil Ochsner, Peter and Ilchmann, Thomas (2016) In Acta Orthopaedica 87.
Abstract
Background and purpose - The original Müller acetabular reinforcement ring (ARR) shows favorable medium-term results for acetabular reconstruction in total hip arthroplasty, where it is used when the acetabular bone stock is deficient. However, there are no data regarding long-term survival of the device. We therefore investigated long-term survival and analyzed radiological modes of failure. Patients and methods - Between 1984 and 2002, 321 consecutive primary arthroplasties using an ARR were performed in 291 patients. The mean follow-up time was 11 (0-25) years, and 24 hips were lost to follow-up. For survival analysis, we investigated 321 hips and the end of the follow-up was the date of revision, date of death, or the last patient... (More)
Background and purpose - The original Müller acetabular reinforcement ring (ARR) shows favorable medium-term results for acetabular reconstruction in total hip arthroplasty, where it is used when the acetabular bone stock is deficient. However, there are no data regarding long-term survival of the device. We therefore investigated long-term survival and analyzed radiological modes of failure. Patients and methods - Between 1984 and 2002, 321 consecutive primary arthroplasties using an ARR were performed in 291 patients. The mean follow-up time was 11 (0-25) years, and 24 hips were lost to follow-up. For survival analysis, we investigated 321 hips and the end of the follow-up was the date of revision, date of death, or the last patient contact date with implant still in situ. Radiological assessment was performed for 160 hips with a minimum of 10 years of follow-up and with radiographs of sufficient quality. It included evaluation of osteolysis, migration, and loosening. Results - 12 ARR THAs were revised: 1 isolated ARR revision for aseptic loosening, 4 revisions of the ARR and the stem for aseptic loosening, 6 for infection, and 1 for recurrent dislocation. The cumulative revision rate for all components, for any reason, at 20 years was 15% (95% CI: 10-22), while for the ARR only it was 7% (95% CI: 4-12) for any reason and 3.4% (95% CI: 1-9) for aseptic loosening. 21 (13%) of 160 ARR THAs examined had radiological changes: 7 had osteolysis but were not loose, and 14 were radiologically loose but were not painful and not revised. Interpretation - Our data suggest that the long-term survival of the ARR is excellent. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Orthopaedica
volume
87
publisher
Taylor & Francis
external identifiers
  • pmid:26471881
  • scopus:84945242650
  • wos:000372447400003
ISSN
1745-3682
DOI
10.3109/17453674.2015.1103607
language
English
LU publication?
yes
id
2c470b7d-1fd7-4425-9f6d-65a7c5d6fc73 (old id 8152132)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/26471881?dopt=Abstract
date added to LUP
2015-11-03 14:50:21
date last changed
2017-07-30 04:01:00
@article{2c470b7d-1fd7-4425-9f6d-65a7c5d6fc73,
  abstract     = {Background and purpose - The original Müller acetabular reinforcement ring (ARR) shows favorable medium-term results for acetabular reconstruction in total hip arthroplasty, where it is used when the acetabular bone stock is deficient. However, there are no data regarding long-term survival of the device. We therefore investigated long-term survival and analyzed radiological modes of failure. Patients and methods - Between 1984 and 2002, 321 consecutive primary arthroplasties using an ARR were performed in 291 patients. The mean follow-up time was 11 (0-25) years, and 24 hips were lost to follow-up. For survival analysis, we investigated 321 hips and the end of the follow-up was the date of revision, date of death, or the last patient contact date with implant still in situ. Radiological assessment was performed for 160 hips with a minimum of 10 years of follow-up and with radiographs of sufficient quality. It included evaluation of osteolysis, migration, and loosening. Results - 12 ARR THAs were revised: 1 isolated ARR revision for aseptic loosening, 4 revisions of the ARR and the stem for aseptic loosening, 6 for infection, and 1 for recurrent dislocation. The cumulative revision rate for all components, for any reason, at 20 years was 15% (95% CI: 10-22), while for the ARR only it was 7% (95% CI: 4-12) for any reason and 3.4% (95% CI: 1-9) for aseptic loosening. 21 (13%) of 160 ARR THAs examined had radiological changes: 7 had osteolysis but were not loose, and 14 were radiologically loose but were not painful and not revised. Interpretation - Our data suggest that the long-term survival of the ARR is excellent.},
  author       = {Sirka, Aurimas and Clauss, Martin and Tarasevicius, Sarunas and Wingstrand, Hans and Stucinskas, Justinas and Robertsson, Otto and Emil Ochsner, Peter and Ilchmann, Thomas},
  issn         = {1745-3682},
  language     = {eng},
  publisher    = {Taylor & Francis},
  series       = {Acta Orthopaedica},
  title        = {Excellent long-term results of the Müller acetabular reinforcement ring in primary total hip arthroplasty.},
  url          = {http://dx.doi.org/10.3109/17453674.2015.1103607},
  volume       = {87},
  year         = {2016},
}