Mid-term clinical results of the cementless R3 cup and Polarstem total hip arthroplasty.
Adult
Aged
Aged, 80 and over
Arthroplasty, Replacement, Hip
/ statistics & numerical data
Female
Follow-Up Studies
Hip Prosthesis
/ statistics & numerical data
Humans
Male
Middle Aged
Osteoarthritis, Hip
/ surgery
Patient Satisfaction
/ statistics & numerical data
Postoperative Complications
Prosthesis Design
Registries
Reoperation
/ statistics & numerical data
United Kingdom
/ epidemiology
Cementless
Polar stem
R3 cup
Total hip arthroplasty
Total hip replacement
Uncemented
Journal
European journal of orthopaedic surgery & traumatology : orthopedie traumatologie
ISSN: 1432-1068
Titre abrégé: Eur J Orthop Surg Traumatol
Pays: France
ID NLM: 9518037
Informations de publication
Date de publication:
May 2019
May 2019
Historique:
received:
01
10
2018
accepted:
03
12
2018
pubmed:
12
12
2018
medline:
4
12
2019
entrez:
12
12
2018
Statut:
ppublish
Résumé
There has been a shift from cemented to uncemented hip arthroplasty. One popular uncemented combination is the R3 acetabular cup with Polarstem, having the lowest revision rate in the UK National Joint Registry. However, there are no medium-term clinical outcomes on this combination in the literature. The aim of this study is to review our centre's outcomes with this combination using conventional bearings with a minimum of 7-year follow-up. Using our centre's arthroplasty database, we identified all patients that underwent a total hip arthroplasty using these implants from August 2009 to December 2010. One hundred and forty-four procedures were performed. The primary outcome was revision rate, and the secondary outcomes were clinical and radiological evaluation. The mean cohort age at surgery was 68.3 years. There were three revisions, of which only one underwent a cup revision. The mean Oxford Hip Score at 7-year follow-up was 38. Radiological evaluation of both acetabular and stem component did not show any radiolucency at 7-year follow-up. Kaplan-Meier survivorship analysis showed an implant survival rate of 97.69% at 7 years using revision for all causes as endpoint. The risk of revision was 1.47% at 7 years. Our revision rates are comparable to the UK's National Joint Registry, with excellent clinical and radiological outcome. Our results correlate with the allocated rating of 7A* by the Orthopaedic Data Evaluation Panel for both R3 acetabular cup and Polarstem.
Sections du résumé
BACKGROUND
BACKGROUND
There has been a shift from cemented to uncemented hip arthroplasty. One popular uncemented combination is the R3 acetabular cup with Polarstem, having the lowest revision rate in the UK National Joint Registry. However, there are no medium-term clinical outcomes on this combination in the literature. The aim of this study is to review our centre's outcomes with this combination using conventional bearings with a minimum of 7-year follow-up.
METHODS
METHODS
Using our centre's arthroplasty database, we identified all patients that underwent a total hip arthroplasty using these implants from August 2009 to December 2010. One hundred and forty-four procedures were performed. The primary outcome was revision rate, and the secondary outcomes were clinical and radiological evaluation.
RESULTS
RESULTS
The mean cohort age at surgery was 68.3 years. There were three revisions, of which only one underwent a cup revision. The mean Oxford Hip Score at 7-year follow-up was 38. Radiological evaluation of both acetabular and stem component did not show any radiolucency at 7-year follow-up. Kaplan-Meier survivorship analysis showed an implant survival rate of 97.69% at 7 years using revision for all causes as endpoint. The risk of revision was 1.47% at 7 years.
CONCLUSION
CONCLUSIONS
Our revision rates are comparable to the UK's National Joint Registry, with excellent clinical and radiological outcome. Our results correlate with the allocated rating of 7A* by the Orthopaedic Data Evaluation Panel for both R3 acetabular cup and Polarstem.
Identifiants
pubmed: 30535590
doi: 10.1007/s00590-018-2357-x
pii: 10.1007/s00590-018-2357-x
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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