“…Nevertheless, some patients later require a second procedure, a total knee arthroplasty (Naudie et al 1999), depending on the degree of osteoarthritis, their level of pain and function, and the degree of correction achieved. Although total knee arthroplasty appears to be technically more challenging after HTO in cases with severe overcorrection, bone stock loss, altered joint line (Figures 1 and 2), or patella infera, only a few studies have found inferior results compared to primary TKA (Windsor et al 1988, Parvizi et al 2004, Haslam et al 2007, Farfalli et al 2012). The aim of this study was to evaluate the risk of revision after TKA, comparing primary TKA with and without previous high tibial osteotomy using data from the Norwegian Arthroplasty Register (NAR).…”