Management of severe valgus knee by total unconstrained arthroplasty: A comparative study with long-term follow-up

Revista española de cirugía ortopédica y traumatología
X Paredes-CarneroJ G Babé

Abstract

To evaluate the use of unconstrained implants in the correction of large valgus deformities using total knee arthroplasty (TKA). A total of 817 primary TKA operated between 1998 and 2006 were retrospectively assessed. 50 TKA were selected (group A) in 49 patients, with a minimum deformity of 15° of valgus, 41 cases were included. Another 50 ATR were selected (group B), with a maximum deformity of 15° of varus, finally including 44 cases in 42 patients. The same surgeon performed every operation. The minimum follow-up time was 10 years. The Knee Society Score (KS and FS), the Oxford Knee Score (OKS) and the Range of Mobility (ROM), both preoperative and postoperative at 1,.5 and 10 years, as well as radiographic evolution and complications were evaluated. Preoperative values of KS, FS and OKS were lower in group A (P<.0001, P<.01 and P<.05, respectively), but not ROM. Postoperatively, KS, FS, OKS and ROM were not different between the groups, neither year, nor 5, nor 10 years. There were also no radiological or complications between the two groups. The use of non-constricted implants in severe valgus was not inferior to the mild varus, implying, in addition, a saving in economic terms, with excellent postoperative results. Corre...Continue Reading

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