Evaluation of soft-tissue balance during total knee arthroplasty.
J Orthop Surg (Hong Kong)
; 18(1): 26-30, 2010 Apr.
Article
en En
| MEDLINE
| ID: mdl-20427829
ABSTRACT
PURPOSE:
To evaluate soft-tissue balance during versus after total knee arthroplasty (TKA).METHODS:
18 men and 75 women aged 52 to 85 (mean, 68) years who had moderate-to-severe varus deformity underwent TKAs using the Scorpio non-restrictive geometry posterior-stabilised system (Stryker Howmedica Osteonics; Allendale, [NJ], USA). All surgeries were performed by a single surgeon using the medial parapatellar approach. After the bony and soft-tissue procedures, soft-tissue balance was measured intra-operatively using a tensor/balancer device. The coronal laxity--angles between the cut surfaces of the femur and tibia--were measured at 0 degree (in extension) and 90 degrees (in flexion). The central gap was also measured. Immediate postoperative soft-tissue balance was measured using an arthrometer, while anteroposterior stress radiographs were being taken. A valgus or varus force was applied just above the knee on the lateral or medial side, with the knee counter-supported and at 15 degrees flexion.RESULTS:
Intra-operatively, the mean coronal laxity at 0 degree (in extension) and 90 degrees (in flexion) was 2.1 degrees and -1.6 degrees, and the mean central gaps were 21.2 and 23.5 mm, respectively. Immediate postoperative mean coronal laxity was 2.9 degrees, indicating that lateral laxity was greater than medial laxity. The postoperative coronal laxity was positively corrected to the intra-operative coronal laxity at 0 degree (r=0.304, p=0.003), but not to the intra-operative coronal laxity at 90 degrees (r= -0.07, p=0.47).CONCLUSION:
Slightly greater lateral laxity was observed after TKA, although equal medial-lateral balance was achieved intra-operatively.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Artritis Reumatoide
/
Artroplastia de Reemplazo de Rodilla
/
Osteoartritis de la Rodilla
/
Inestabilidad de la Articulación
Tipo de estudio:
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Risk_factors_studies
Límite:
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Orthop Surg (Hong Kong)
Asunto de la revista:
ORTOPEDIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Japón