<s>[INST] had a sports injury 40 years ago, cartlidge taken out then, i now have athritis and my knee is buckled, I walk with a limp and i am in pain, I have limited movement both straight and bending, think I need a full replacement, ive read about the robotic placement of the joint, and would like some information about this procedure. [/INST] Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. The procedure is done under the guidance of an orthopedics and is a successful one. Hope I have answered your query. Let me know if I can assist you further. </s>