The hip of the human body is a wonderful joint. It is known as a ball and socket joint. Every time we walk this is a rotation of the hip and through time can wear the joint down. With age people may need a hip replacement or resurfacing of the hip joint. This is achieved through the use of biocompatible materials. Biocompatible just means that it is ok to use in the human body, ergo compatible with our biology. A new hip or a resurfaced hip can provide someone with a vastly improved quality of life, compared to a damaged hip. There are different materials used, from polymers,metals and ceramics.

A full hip replacement is more successful using ceramic on polyethylene(polymer). As metal can pose risks to the patient's health. Titanium is the metal of choice when using metal within the body. However as the hip joint rubs together using metal is not desirable. This is because of the wear particles. Which form when two surfaces rub together. Metal particles or metal ions would go into a patient's bloodstream which is not ideal.

Even though ceramic on polyethylene is popular, wear particles from the polymer can be produced which is less than ideal. Therefore ceramic on ceramic is more desirable as they have no allergic reactions or adverse effects from patients. They also result in fewer revision surgeries. However they may make squeaking noises when in use which ceramic on polymer does not. So it is weighing up the pros with the cons. Though overall it is amazing what we can do with materials to fix problems within the human body.

© SusanPS125