Bilateral knee joint replacement – Satisfactory results Bilateral knee pain and limitation of movement for more than 8 years, aggravated for 1 year The patient developed bilateral knee pain about 8 years ago with no obvious cause, which gradually worsened, and was treated symptomatically with oral pain medication, and in the past 1 year, bilateral knee pain worsened, and bilateral knee deformation occurred, with significant pain after activity, affecting daily life. The patient has been on the ground for 3 days after surgery, and the joints are stable and can be fully extended and flexed up to 90 degrees, and is recovering smoothly.