Answer
With recent advances in surgery and improvement in materials for arthroplasty, most joints can be surgically repaired or replaced. However, the ones most often repaired in the United States are are hip joints, knees, and shoulder joints.
Work Step by Step
Almost 300,000 hip replacements are done in the US annually. the number of knee replacements at about 200,000 annually is not far behind.
Most joint replacement surgeries are done for one some or all of the following reasons; relief of persistent pain; increase of range of motion or to improve mobility of the patient.