ObjectivesTo study the vascularity and bone metabolism of the femoral head/neck
following hip resurfacing arthroplasty, and to use these results
to compare the posterior and the trochanteric-flip approaches.MethodsIn our previous work, we reported changes to intra-operative
blood flow during hip resurfacing arthroplasty comparing two surgical
approaches. In this study, we report the vascularity and the metabolic
bone function in the proximal femur in these same patients at one
year after the surgery. Vascularity and bone function was assessed
using scintigraphic techniques. Of the 13 patients who agreed to
take part, eight had their arthroplasty through a posterior approach
and five through a trochanteric-flip approach.ResultsOne year after surgery, we found no difference in the vascularity
(vascular phase) and metabolic bone function (delayed phase) at
the junction of the femoral head/neck between the two groups of
patients. Higher radiopharmaceutical uptake was found in the region
of the greater trochanter in the trochanteric-flip group, related
to the healing osteotomy.ConclusionsOur findings using scintigraphic techniques suggest that the
greater intra-operative reduction in blood flow to the junction
of the femoral head/neck, which is seen with the posterior approach
compared with trochanteric flip, does not result in any difference
in vascularity or metabolic bone function one year after surgery.