Thiengwittayaporn S, et al. - A total of 84 patients who underwent unilateral TKA using the Legion posterior-stabilized (PS) Total Knee System were randomized into patellar resurfacing (PR) group or non-PR group by the experts to contrast the PC incidence in PR and non-PR PS-TKA, to ascertain the time of PC presentation in PS-TKA, to recognize radiographic parameters related to PC, and to contrast clinical outcomes of patients with and without PR. In the non-PR group, PC occurred significantly more. In both groups, the time of PC presentation did not vary. In 16.7% of crepitus patients, the Anterior knee pain was observed, and none needed any surgical procedure. The non-PR knees had important reductions in patellar shift index, patellar displacement, Insall-Salvati ratio, and patellar component height and rise in variation in posterior femoral offset. In the PR group at 9 months and 1 year, oxford and patellar scores were significantly better. Therefore, resurfacing is suggested during PS-TKA with this knee system in order to avoid PC development, provided higher PC incidence and several worse clinical outcomes in the non-PR.