e171 Synovial Barium and Zirconium Ions are Promising Markers for Aseptic Loosening

e172 Operative Time Learning Curve for an Image-Free Robotic-Assisted Total Knee Arthroplasty

e173 Comparative Analysis of Posterior Tibial Slope and Distal Tibial Rotation in Medial Open-Wedge High Tibial Osteotomy through 3D Simulation and Actual Surgery

e174 High Molecular Weight Hyaluronic Acid Injection had Similar Outcome to Saline in Knee Osteoarthritis: A Randomized Double-Blind, Placebo-Controlled Trial

e175 The Effect of Computer Assisted Technologies on Risk of Revision, Patient-Reported Outcome Measures, and Mortality following Primary Total Knee Replacement: An Analysis of National Joint Registry Data