Ceramics In Total Hip Replacement

2 zirconia has a monoclinical crystalline structure at room.

Ceramics in total hip replacement.

These advantages are achieved if the mat. The monoclinic the tetragonal and the cubic phases. These are some of the hardest substances known with only diamond being harder than aluminum oxide ceramics. In england wales and northern ireland the national joint registry recorded that 796 636 thrs were performed between 2003 and 2015 1 in the usa an estimated 2 5 million people are living with a hip replacement 2 the main indications for elective thr are pain and functional limitations.

The ceramics were supposed to be very well tolerated because of their high level of oxidation. 1 department of orthopaedic surgery wake forest university health sciences winston salem nc 27157 usa. This hardness provides ceramic hip replacements with an extremely smooth surface making them much less prone to wear. Cerasurf ceramic for total hip arthroplasty coorstek cerasurf p is a state of the art material used for ceramic bearing surfaces in total hip arthroplasty.

Improvements in the production of ceramics has significantly lowered this risk and it is now estimated to be about 1 in 25 000. Pure zirconia is an unstable material showing 3 different crystalline phases. The ceramics used in hip replacement surgery are alumina ceramic and zirconia ceramic. The use of ceramic on ceramic coc bearings in primary total hip arthroplasty tha is increasing and has been intensively analysed.

Lang je 1 whiddon dr smith el salyapongse ak. Ceramics were introduced in total hip replacement thr to address the problems of friction and wear that were reported with the metal on metal and with the metal on polyethylene metal on pe articulations. Alumina on alumina total hip arthroplasty has been used for 32 years in europe. Ceramics have been used as a bearing surface in total hip arthroplasty tha for more than 30 years.

Use of ceramics in total hip replacement. Zirconia zro 2 zirconia ceramic was introduced in the manufacture of femoral heads for total hip replacements because of its higher strength and toughness which would reduce the risk of fracture. Many surgeons today consider them to be an improvement over traditional metal and plastic implants in which the deterioration of plastic can lead to the gradual buildup of debris around the joint. Although ceramic is hard it is brittle and can break.

Comprised of an alumina matrix composite cerasurf p incorporates advanced toughening mechanisms to improve the performance of the material. This bearing plays a particularly relevant role in young active patients and shows advantages over other bearings in biocompatibility wear rate and lubrication properties. In a few ceramic hip replacements there has a catastrophic failure. Metals and plastics can deform under stress ceramic can t.