Introduction: Osteoarthritis (OA) is a chronic joint degeneration disease with a fairly high prevalence in the world population which is a leading source of disability for public health. Total Knee Arthroplasty (TKA) has been widely accepted as a definitive therapy for cases of knee OA that have failed nonoperative therapy. Posterior Tibial Slope (PTS) is a crucial factor influencing anteroposterior stability, range of motion, tension on knee ligaments, and the balance of flexion and extension gaps in knee arthroplasty. There is a potential role for PTS as an indicator of knee joint recovery and TKA success in osteoarthritis patients. Objective: Examining the PTS in post-TKA osteoarthritis patients at H. Adam Malik Hospital, Medan. Methods: This study used a retrospective cohort approach on OA patients who underwent TKA surgery at H. Adam Malik General Hospital, Medan in September 2021 – October 2022. All data in this research was taken from the patients medical records. In subjects who met the inclusion criteria, visual analog scale (VAS), range of motion, and PTS were examined before and after the TKA procedure. The data obtained was analyzed statistically. Results: There are differences in PTS and pre and post TKA surgical outcomes in genu osteoarthritis patients at H. Adam Malik General Hospital Medan, with PTS namely t = 6.872 > t table = 1.689 and p = 0.000 < 0.05, flexion outcome namely t = -4.794 > t table = 1.689 and p = 0.000 < 0.05, extension, namely t count = 4.896 > t table = 1.689 and p = 0.000 < 0.05, and VAS, namely tcount = 9.788 > t table = 1.689 and p = 0.000 < 0.05. Conclusion: After performing TKA in OA patients, there is an improvement in PTS, flexion outcome, extension, and VAS.

Osteoarthritis

Total Knee Arthroplasty

Posterior Tibial Slope