What is Herniarthroplasty and what is the difference between cemented and uncemented?

Question

What is Herniarthroplasty and what is the difference between cemented and uncemented?

Answer 1

I believe you are asking about a hemiarthroplasty, rather than a herniarthroplasty which is not a possible operation.  A hemiarthroplasty is a surgical procedure which replaces one half of the joint with an artificial surface and leaves the other part in its natural (pre-operative) state. This procedure is most commonly performed on the hip after fracturing the neck of the femur (a hip fracture). The procedure is performed by removing the fractured head of the femur and replacing it with a metal or composite prosthesis. The prosthesis can be cemented into the bone shaft or may be of a type which is self retaining and does not require cement.  The patient's condition determines which is the better prosthetic choice.