Curiously enough, high age is no obstacle for a total knee replacement, but low age is!
Studies demonstrated that:
- only 25% surgeons were against total knee replacement operations in patients aged over 80 years, whereas
- 65% surgeons were against total knee operations in patients younger than 50 years
Here are some answers: (more…)
What are the major differences among the hip resurfacing implants?
The primary difference lies in the backing of the acetabular component. The BHR (Midland Medical Technology) uses a cast porous surface with a hydroaxiphate (HA) coating to promote bone ingrowth. The Wright Conserve Plus using a sintering process to affix cobalt chrome beads to the back surface. The Corin Cormet device has a plasma sprayed titanium backing with an HA coating. MidMedtech asserts that the heating of the device in the sintering or plasma spray process weakens the metal integrity. It has been shown in laboratory tests however, that when the machining tolerances are identical, the wear rate is not affected by the heat treatment. (more…)
“I am about to have a total hip in May. The thought of it is exhausting as I am only 30 years old. A big piece of metal would stay inside my body for many years! How will my body react to it? Perhaps, frightful thought, I may develop cancer around it?….”
Alloys used for manufacture of total hip prostheses contain materials which are potentially carcinogenic (can produce cancer) in animals.
It is also known that levels of some metals (Chromium, Nickel, e.g) are elevated both in the tissues around the total hip joint and in the blood of patients with total hips.
Also bone cement contains materials with potential carcinogenic effect that may enter into the circulation. (more…)