There is no need to take extra calcium supplements for knee replacement. The purpose of knee replacement is to relieve knee pain, improve knee function and correct knee deformity, mainly for knee osteoarthritis, rheumatoid arthritis, traumatic arthritis and other conditions, which has nothing to do with calcium deficiency. After knee replacement surgery, attention should be paid to the prevention of infection, under the guidance of the doctor gradually carry out functional rehabilitation exercises to enhance the strength of the surrounding muscles and restore joint function. There is no need to take extra calcium supplements for knee replacement. If you have osteoporosis, you can take calcium supplements under the guidance of your doctor or consume more milk, soy products and other foods with high calcium content. Rehabilitation exercises should be carried out under the doctor’s guidance after knee replacement.