The risk of bearing dislocation in lateral unicompartmental knee arthroplasty using a mobile biconcave design.
Knee Surg Sports Traumatol Arthrosc
; 21(11): 2487-94, 2013 Nov.
Article
en En
| MEDLINE
| ID: mdl-22926671
ABSTRACT
PURPOSE:
A safety study was conducted on a cohort of 25 patients who underwent lateral unicompartmental arthroplasty with a biconcave mobile-bearing insert.METHODS:
The first 25 lateral mobile-bearing unicompartmental knee replacements, performed in a general hospital by one surgeon, were prospectively reviewed, with a minimum follow-up of 1 year.RESULTS:
One bearing dislocation occurred 4 months postsurgery. The Oxford knee score improved in all patients from a preoperative mean of 23.3 (range 8-40, SD 8.4) to a postoperative mean of 42.1 (range 23-48, SD 6.7). General patient satisfaction at a mean follow-up of 20 months was excellent in 84 %, good in 12 % and fair in 4 %. The mechanical axis as a measure on full-leg standing radiographs improved from 5.7° valgus (range 1°-16°, SD 4.1°) to 1.7° valgus (7° to -3°, SD 2.1°). Mechanical alignment correction averaged 4.0° (range -1° to 15°, SD 3.9°).CONCLUSION:
The mobile biconcave insert design in the lateral unicompartmental knee replacement seems appropriate as a innovative, anatomy imitating solution, resulting in a good clinical outcome. Still, bearing dislocation remains a concern, especially in extended indication.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Falla de Prótesis
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Artroplastia de Reemplazo de Rodilla
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Osteoartritis de la Rodilla
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Prótesis de la Rodilla
Tipo de estudio:
Diagnostic_studies
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Etiology_studies
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Risk_factors_studies
Límite:
Adult
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Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Año:
2013
Tipo del documento:
Article