title: Scintigraphic assessment of bone status at one year following hip resurfacing: Comparison of two surgical approaches using SPECT-CT scan.
abstract: OBJECTIVE
  To 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.
  
  
  METHODS
  In 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.
  
  
  RESULTS
  One 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.
  
  
  CONCLUSIONS
  Our 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.
authors.affiliation: Warwick Orthopaedics, University of Warwick, Clinical Sciences Research Institute, Clinical Sciences Building, Clifford Bridge Road, Coventry CV2 2DX, UK.
authors.forename: H W
authors.initials: HW
authors.lastname: Amarasekera
authors.forename: P
authors.initials: P
authors.lastname: Roberts
authors.forename: M L
authors.initials: ML
authors.lastname: Costa
authors.forename: N
authors.initials: N
authors.lastname: Parsons
authors.forename: J
authors.initials: J
authors.lastname: Achten
authors.forename: D R
authors.initials: DR
authors.lastname: Griffin
authors.forename: N R
authors.initials: NR
authors.lastname: Williams
keywords: Bone scanning; Hip resurfacing; Metabolic bone function; SPECT CT; Scintigraphy; Vascularity