Hip replacement surgery, or hip arthroplasty, is a surgical procedure in which an orthopaedic surgeon removes the diseased parts of the hip joint and replaces them with new, artificial parts. These artificial parts mimic the function of the normal hip joint
怎么中国没听说/不普遍/有钱人老了也要受行动不便之苦,好像理所当然,不知有改善hip joint 的手术?