RESUMO
Background: Total knee arthroplasty on excessive genu varum is a more demanding technique and gives worst results than procedures on moderate deformations. It remains a subject of controversies due to the lack of consensus. The purpose of our study is to evaluate the results of total knee arthroplasty [TKA] on excessive genu varum [superior to 20[degree sign]] by analyzing pre and post operative clinical and radiological parameters
Methods: We reviewed retrospectively 40 TKA in 33 patients [seven patients operated bilaterally] performed for genu varum superior to 20[degree sign] between 2004 and 2011. Pre and post operative evaluation of patients were done according to the International Knee Society score
Results: The mean age of our patients was 67 years with a female predominance. Tricompartmental arthritis was the etiology in all cases. Pre operative IKS score and HKA angle were respectively 52,36 /200 points and 155,7[degree sign]. The mean follow up was 4 years. Our results were generally satisfactory. The post operative IKS score was 155,36 points [mean joint score of 85.85 points and mean functional score of 69.26 Points] and the post operative HKA angle was 176,17[degree sign]. Only 60[degree sign] of patients had normal HKA angle. We noted aseptic loosening of the tibial component in 3 cases
Conclusion: TKA on excessive genu varum is more demanding technique. Pre operative planning after analyzing different clinical and radiological parameters is necessary to obtain a good functional outcome while minimizing the rate of complications