Abstract

SILVANO, Raúl E. et al. Ventajas del abordaje externo para la artroplastia de rodilla por genu valgo severo. Rev. Asoc. Argent. Ortop. Traumatol. [online]. 2021, vol.86, n.4, pp.512-518. ISSN 1852-7434.  http://dx.doi.org/https://doi.org/10.15417/issn.1852-7434.2021.86.4.1404.

Introduction: The treatment of severe valgus is complex. The lateral approach described by Keblish is advantageous for the treatment of these deformities. We decided to evaluate our outcomes using a lateral approach in severe genu valgus knee arthroplasty. Materials and Methods: Of 795 primary arthroplasties from January 2012 to March 2020, we analyzed 40 performed by lateral approach. All had a valgus deformity greater than 20° and a sufficient medial collateral ligament. 33 women (3 bilateral) and 4 men were included. Average age was 71 years (59-79). The main cause was osteoarthrosis (82%). The presurgical deformity was 27° (21-39). The preoperative measurements were: Knee Society Score (KSS) 15 (5 to 42). Preoperative functional score (KFS): 17 (0 to 40). Average surgical time: 91 minutes. The average postoperative follow-up was 37 months. Results: Postoperative femorotibial angle 6.2° (range 4° to 10°). Postoperative KSS 79 (46-95). KFS 82 (60-100). Complications: 3 cases (7%), one infection, one case with poor positioning of components, and one case of peroneal neuropraxia. Conclusion: In knee arthroplasty due to genu valgus, this approach allows restoring the femorotibial axis and achieving adequate prosthetic stability, even with implants without a greater degree of constraint, with a complication rate comparable to other techniques.

Keywords : Valgus; approach; lateral; arthroplasty; knee.

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