The effect of femoral offset modification on gait after total hip arthroplasty.
Acta Orthop
; 85(2): 123-7, 2014 Apr.
Article
em En
| MEDLINE
| ID: mdl-24564749
ABSTRACT
BACKGROUND AND PURPOSE:
A decrease of 15% in femoral offset (FO) has been reported to generate a weakness of the abductor muscle, but this has not been directly linked to an alteration of gait. Our hypothesis was that this 15% decrease in FO may also generate a clinically detectable alteration in the gait. PATIENTS ANDMETHODS:
We performed a prospective comparative study on 28 patients who underwent total hip arthroplasty (THA) for unilateral primary osteoarthritis. The 3D hip anatomy was analyzed preoperatively and postoperatively. 3 groups were defined according to the alteration in FO following surgery a minimum decrease of 15% (9 patients), restored (14), and a minimum increase of 15% (5). A gait analysis was performed at 1-year follow-up using an ambulatory device. Each limb was compared to the contralateral healthy limb.RESULTS:
In contrast to the "restored" group and the "increased" group, in the "decreased" group there was a statistically significant asymmetry between sides, with reduced range of motion and a lower maximal swing speed on the operated side.INTERPRETATION:
A decrease in FO of 15% or more after THA leads to an alteration in the gait. We recommend 3-D preoperative planning because the FO may be underestimated by up to 20% on radiographs and it may therefore not be restored, with clinical consequences.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Osteoartrite do Quadril
/
Artroplastia de Quadril
/
Fêmur
/
Marcha
/
Articulação do Quadril
Tipo de estudo:
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Risk_factors_studies
Limite:
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Acta Orthop
Assunto da revista:
ORTOPEDIA
Ano de publicação:
2014
Tipo de documento:
Article