Surgical Outcome in MCL and Extensor Mechanism Disruption Following Trauma in 80 years Old Post Total Knee Arthroplasty Spondyloarthropathic Patient: A Case Report

Introduction: Ankylosing spondylitis (AS) is characterized by osteoproliferation-induced axial skeleton and sacroiliac joint damage that leads to spinal deformity and functional disability; up to 70% of patients have knee and other joints involvement and may require total joint replacement despite adequate pharmacological support Total knee arthroplasty (TKA) is an effective procedure in AS patient but very little has been reported on the outcomes. But the peculiar gait pattern due to ankylosed joints, which do not improve substantially after TKA, increases the incidence of falls, leading to complications. Case presentation: An 80-year-old Asian male with Primary TKA suffers extensor mechanism disruption and medial collateral ligament injury after a fall and undergoes Rotating hinge knee and patellar tendon repair augmented with semi-t graft. The patient could initially achieve early weight-bearing with splint support, later with the cylindrical cast. Conclusion: Rotating Hinge Knee is a viable option in low-demand patients with good outcomes in patients with collateral ligament rupture. Semi-T augmented PT repair reinforced with suture anchors gives the relatively best result.