Rajkumar N, et al. - The incidence of lateral retinacular release (LRR) in consecutive primary total knee arthroplasty (TKA) with the non-resurfaced patella and posterior-stabilized implant design was examined by the researchers in order to discover the incidence of lateral retinacular release in consecutive primary TKA with non-resurfaced patella and posterior-stabilised implant design and to investigate the preoperative radiological parameters which prognosticate the requirement for lateral retinacular release during TKA. A total of 250 consecutive primary TKA (212 patients) from January 2016 to May 2016 were recruited. The requirement for LRR was significantly correlated with preoperative radiological parameters like patellar shift and patellar tilt. The adjusted odds of LRR were larger for morphological parameters like Wiberg type 3 patella, lateral facet thinning, lateral patellofemoral arthritis and coronal valgus deformity in comparison with a non-released group. Hence, a high chance of tight lateral retinacular structures was indicated in the preoperative evaluation of these radiological parameters in the axial view. This helped in recognition of the patients who had a higher possibility of patellar maltracking during total knee arthroplasty. Moreover, suitable lateral retinacular release helped to give better patellar tracking following TKA.