Different Types of Hip Replacement
Ceramic is a harder, more
polished material than metal and plastic. Ceramic is used in younger
patients because of the possibility of lasting longer. Dr. Allison
usually uses these in patients under the age of 50. Ceramic is a more
brittle substance and a few hips have broken. None have broken within
the company that Dr. Allison uses and this company is FDA approved.
METAL ON PLASTIC
When hip replacement began, the
standard of care was metal rotating on plastic. It is still
the standard of care today. Most hips placed around the world are placed
with a metal ball rotating against a plastic cup. Dr. Allison
continues to place most hips this way. It has the advantage of
years of reliability and experience.
METAL ON METAL
Metal rotating on metal is a
form of replacement that has the advantage of lasting longer due to the
hardness of the surfaces rotating together. They have become more
popular in recent years. They are indicated in younger patients due to
their assumed longevity. These hips are made of cobalt chromium.
Chromium ions have been shown to be elevated in the blood of patients
with these hips. Chromium has been implicated in some types of cancer.
For this reason Dr. Allison is not currently using this type of
replacement and will not until their safety has been proven on a long