The radiation therapy is used by some surgeons to prevent heterotropic bone formation following total hip replacement. In cemented total hip replacement this does not cause much problem. However in Hip Resurfacing (Acetabular side) and uncemented total Hip Replacement the fixation of prosthesis is by the natural bone growing on the prosthesis. When radiation is used this natural bone growth is also affected which may lead to failure of fixation. The inventors of Birmingham hip resurfacing do not advise radiation. We follow this and we never had any heterotropic bone growth following hip resurfacing.