1Hip Replacement: A case study for material selection•A commonly occurring condition is referred toas "wear and tear arthritis” or Osteoarthritis.•The hip joint is an important component of the skeletal system.•At this junction, loads are transmitted from bone to bone by muscularaction.This is normally accompanied by some relative motion of thecomponent bones•There are many conditions that can result in degeneration of the hipjoint. A painful hip can severely affect your ability to lead a full activelife.
2Replacement Components•Damaged and diseased hip joints have been replacedwith artificial or prosthetic ones, with moderate success,beginning in the late 1950s.•Each prosthesis is made up of two parts:–The acetabular component (socket portion) replaces theacetabulum.–The femoral component (stem portion) replaces the femoral head.
3The SurgeryRemoving the Femoral Head Reaming the AcetabulumInserting the Acetabular Component Preparing theFemoral Canal Inserting theFemoral Stem
4Attaching the Femoral HeadThe Completed Hip Joint
5Material Requirement•In essence, there are four basic components to theartificial hip:–1. The femoral stem–2. The ball that attaches to the stem–3. The acetabular cup that is affixed to the pelvis–4. A fixation agent that secures the stem into the femoral and thecup to the pelvis•