Advantages and Disadvantages of Unicompartmental Knee Replacement


The advantages of a Unicompartmental Knee Replacement compared to a Total Knee Replacement include:

  • Smaller operation with a smaller incision
  • Smaller amount of bone removed
  • Shorter hospital stay
  • Quicker recovery
  • Less pain following surgery
  • Less blood loss with a blood transfusion rarely required
  • Greater movement of the knee
  • Feels more like a ‘natural’ knee post surgery. This is because the bone, cartilage and ligaments in the healthy parts of the knee are untouched
  • A smaller amount of post surgery physiotherapy is required
  • Following surgery, patients are able to be more active than they would be following a Total Knee Replacement
  • If for some reason the Unicompartmental Knee Replacement is not successful or fails many years down the track, it can be revised to a Total Knee Replacement easily and without difficulty



  • A Unicompartmental Knee Replacement is not as reliable or as predictable in taking away all the pain associated with osteoarthritis as it is with a Total Knee Replacement
  • Potentially there may be the need for more surgery in the future and a Total Knee Replacement may be required if arthritis develops in the parts of the knee that have not been replaced