Knee replacement surgery aims to restore the broken knee joint's area and reduce knee pain that is unresponsive to other kinds of therapy. The knee may be divided into 3 compartments: patellofemoral, the compartment before the knee between the knee cap and thigh bone, medial compartment, on the inside portion https://www.theorthopaedicandpainpractice.com/the-benefits-and-risks-of-knee-replacement-surgery/