 The 10 year survival of current uncemented total hip designs approaches 95 5. The majority of the 5 that are revised are done so for aseptic non-infected loosening of the components. The functional results of revision total hip surgery are poorer than primary hip replacement surgery 3, 5, 6. There are approximately 20 000 hip replacement performed each year in Canada CIHI website; this will result in roughly 1000 revisions over the next 10 years - a great expense, both in terms of health care resources and in patients loss of function. Obviously, efforts directed at decreasing revision rates are clinically and financially worthwhile. 