During the hip replacement procedure, the surgeon removes the entire head of the thigh bone and inserts a metal stem hip prosthesis in its place, and then connects it to the thigh bone. It is then secured with the help of a ceramic or metal ball on the top.
Hip resurfacing, on the other hand, involves the minimal removal of the damaged tissues and their replacement with a modified implant. It is generally performed for hip osteoarthritis patients under the age of 60.