July 12, 2013
After hip resurfacing, bone mineral density continued to positively change up to
5 years, primarily in the trochanteric and superior neck regions, according to
recent study results published in the Journal of Arthroplasty.
…(the)femoral component size has a significant role
to play in the change in [bone mineral density] BMD up to 5 years…
…"The greater the acetabular inclination, the greater the increase in
trochanteric area BMD at 5 years…A valgus position of the
femoral component leads to a significantly greater increase in the BMD both in
the superior femoral neck region and trochanteric area at 5 years.
Researchers prospectively studied BMD change in 31 patients with a Birmingham
Hip Resurfacing (Smith & Nephew; Memphis, Tenn.) system. At 5-year follow-up,
data were available for 26 patients.
BMD had decreased by up to 10% in the trochanteric and superior neck regions at
6 weeks and 3 months after surgery before recovering to preoperative levels by 1