arthritic, arthritis, arthroplasty, arthrosis, artificial, cap, caps, content, degenerative, distal, exh4485, extremities, extremity, femoral, femur, femurs, injuries, injury, joint, joints, knee, kneecap, kneecaps, knees, leg, legs, lower, operation, operations, operative, orthopaedics, orthopedics, osteoarthritis, patella, patellae, patellar, patellas, procedure, procedures, prostheses, prosthesis, prosthetic, prosthetics, replacement, replacements, rheumatology, surgeries, surgery, surgical, tibia, tibial, total, 97, 4485 delete this