TKA outcomes after prior bone and soft tissue knee surgery

Purpose Bone surgery around the knee joint could represent a more traumatic prior surgical procedure compared to soft tissue knee surgery and may predispose to differing postoperative total knee arthroplasty (TKA) outcomes. The objective of this study was to analyse the postoperative results as well as complications and failures in two groups of patients that had undergone knee surgery prior to primary TKA (bone surgery and soft tissue surgery) when compared to the no prior surgery group. Methods A retrospective and cohort series of 1,474 primary TKA were evaluated at minimum follow-up period of 2 years: 1,119 primary TKA underwent no prior surgery (1,119 patients) (group A), 85 primary TKA (85 patients) (group B) had prior bone procedure [high tibial osteotomy ( n = 64), tibial plateau fracture ( n = 10) and patellar realignment ( n = 11)], and third group of 146 primary TKA (146 patients) (group C) had undergone a soft tissue procedure [arthroscopy ( n = 60) and menisectomy ( n = 86)] before primary TKA. All the patients underwent a clinical and radiological evaluation as well as International Knee Society (IKS) scores. Results Preoperatively, group B had 40 % of cases classified as stage IV knee arthritis ( p