Clinical and functional results of Optetrack Total Knee Arthroplasty after 6 to 13 years: findings from a retrospective study

Introduction: Total Knee Arthroplasty (TKA) is considered the gold standard in the treatment of knee osteoarthritis and post-traumatic knee deformities. The aim of the study was to report the functional results of a group of OptetrackTM TKA patients over a period between 6 and 13 years after surgery. Material and methods: A group of 47 TKA prostheses applied to 39 patients (32 women) were analysed retrospecti- vely. All patients received the same type of TKA and the same rehabilitation program. Patients were assessed before sur- gery and 3, 6 and 12 months after surgery; follow-ups were performed annually. Assessment was based on Knee Range of Motion (ROM) and a Knee Rating Score (IKS) composed of two partial scores: Knee Score (KS) and Functional Score (FS). The variables in uencing the IKS score were identi ed using a Generalized Linear Model. Results: The mean follow-up was 9.95 years (range 6–13). Mean age was 81.2 years (range 62–95). At the last fol- low-up, the mean IKS score increased from 78.6 (range 15–155) to 145.2 (range 58–200). Mean KS increased from 40.5 (range 0–96) to 85.7 (range 50–100); mean FS increased from 38.9 (range 0–75) to 60.9 (range 0–100). Mean knee ROM increased from 87.6° to 108.4° (range 50°–130°). Preoperative IKS score, male sex and age at surgery were positively correlated to the IKS score at follow-up. Conclusions: TKA improved pain score, while the functional score decreased over time. Good preoperative IKS score and male sex were considered good outcome predictors; old preoperative age was considered as unfavourable