A traditional hip replacement implant uses a metal femoral head the ball of the implant and conventional polyethylene or plastic as the acetabular component the socket of the implant. Ceramic on polyethylene is currently the most popular hip replacement material representing 506 of all hip replacement cases back in 2014 patients understand the risks that metal joints and sockets bring to their long term health and are moving away from the material. The many different materials used in hip replacement devices hip replacement devices break into a few big categories metal on metal mom these are what they sound like both the socket and the ball are made of stainless steel titanium chromium cobalt or some combination of these one sub type of a mom hip is a minimally invasive model which usually is smaller in size so it can be . These pieces are covered in a rough material that encourages bone growth bone growth into the artificial joint can provide additional long term joint stability some parts of the artificial joint may be screwed in place to keep the joint stable hybrid in this type of surgery one piece of the artificial joint is attached with cement while the other piece is covered in a rough material that