Image 1

  • Total hip replacement (THR) is a salvage procedure.
  • Functional results are excellent with an expectation that the patient will achieve normal athletic activity, even work.
  • THR is appropriate for all dogs which cannot enjoy full, unrestricted activity following appropriate medical treatment.
  • THR is not just for very severely affected dogs.
  • THR can be performed successfully even in skeletally immature dogs
  • Although most patients are larger breeds, small implants are available making THR an option for Westies etc with Perthes disease.

Image 2

  • Many of the problems and complications with THR relate to the use of polymethylmethacrylate bone cement.
  • Newer designs of hip are cementless - these radiographs show a Biomedtrix BFX cementless hip in a 40Kg labrador.
  • The implants have a porous metallic coating into which patient bone grows providing a permanent, biomechanically sensitive and immensely strong bond.
  • Cementless hips are more difficult to implant than older systems demanding an exact and precise surgical technique. Some surgeons have struggled to overcome these technical challenges.

Image 3

  • Open leg lateral view of a cementless THR - 4 year follow up.
  • This view is useful in evaluating hips as it minimises interference from overlying structures.
  • In this case the implant-bone bond is mature, well established and stable.
  • The patient is a Labrador retriever that has worked three full seasons since the hip replacement performed when the patient was 16 months old.