Although the Western Ontario and McMaster Universities
(WOMAC) osteoarthritis index was originally developed for the assessment
of non-operative treatment, it is commonly used to evaluate patients
undergoing either total hip (THR) or total knee replacement (TKR).
We assessed the importance of the 17 WOMAC function items from the perspective
of 1198 patients who underwent either THR (n = 704) or TKR (n =
494) in order to develop joint-specific short forms. After these
patients were administered the WOMAC pre-operatively and at three,
six, 12 and 24 months’ follow-up, they were asked to nominate an
item of the function scale that was most important to them. The
items chosen were significantly different between patients undergoing
THR and those undergoing TKR (p <
0.001), and there was a shift
in the priorities after surgery in both groups. Setting a threshold
for prioritised items of ≥ 5% across all follow-up, eight items
were selected for THR and seven for TKR, of which six items were
common to both. The items comprising specific WOMAC-THR and TKR
function short forms were found to be equally responsive compared
with the original WOMAC function form. Cite this article:
Using these type of prosthesis in cases of primary operation, later on in cases of first revision the so called standard prosthesis can be used.
The mean age of these patients is below 50 years. The implantations have been done by an modified anterolateral Watson Jones approach. Especially for the use of the MAYO stem we developed a minimal invasive operation technique to provide any trauma to the gluteal muscles. All the cases we have done are under clinical and radiological follow up.
We have seen less complications by using the MAYO stem in comparison to the group of patients with our standard hip stems. 95% of the operations could be done without any incision to the gluteal muscles at the greater trochanter of the femur; the mean length of skin incision has been less than 8 cm. The x-ray follow up shows in none of our cases any osteolysis in the region of the calcar femoris.