Introduction: Total Knee Arthroplasty (TKA) is now a reliable treatment for severe osteoarthritis. Total knee arthroplasty (TKA) is a dependable and universally used operation. Primarily intended to alleviate pain in patients with severe arthritis, the procedure has undergone several modifications with respect to implant designs and surgical techniques with the sole motive of providing long-term success rates. The aim of this study was to evaluate the functional results of Total Knee Replacement using rotating platform implant in patients with grade 3 and 4 knee osteoarthritis.

Materials and Methods: This prospective study consisted a total of 25 cases of total knee replacement surgery for symptomatic primary osteoarthritis of knee. The severity of OA was classified by Kellgren‑Lawrence (KL) grading. Post-operative evaluation, subjective assessment of symptoms and functional as well as radiological status of the patients were assessed based on HSS score.

Results: The pain HSS scores showed improvement from the mean preoperative HSS value of 9.2 to 23. The post-operative function HSS score also showed a marked improvement over the pre-operative score. Range of motion improved from a preoperative HSS score of 12.76 to 13.88. There was some improvement in flexion contracture from preoperative to postoperative values. The instability HSS score from pre-operative to post-operative changed from a mean of 8.96 to 8.36. LDFA has increased from the mean of 82.26 to 85.56, MPTA has increased from mean of 84.98 to 86.75, PCOR has decreased from mean of 0.49 to 0.48 and Tibial slope has decreased from a mean of 8.79 to 4.87.

Conclusion: Rotating platform TKA demonstrated satisfying overall results with very few and well-controlled complications.