Periacetabular Bone Mineral Density Changes After Resurfacing Hip Arthroplasty Versus Conventional Total Hip Arthroplasty. A Randomized Controlled DEXA Study

Abstract A randomized controlled trial was performed to evaluate acetabular bone mineral density (BMD) changes after hip resurfacing (RHA) versus an established conventional total hip arthroplasty (THA). A total of 71 patients were allocated randomly to receive either an RHA press-fit cobalt–chromiu...

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Bibliographic Details
Published in:The Journal of arthroplasty 2013-08, Vol.28 (7), p.1177-1184
Main Authors: Smolders, José M.H., MD, Pakvis, Dean F., MD, Hendrickx, Baudewijn W., MD, Verdonschot, Nico, PhD, van Susante, Job L.C., MD, PhD
Format: Article
Language:English
Subjects:
Absorptiometry, Photon
Analysis of Variance
Arthroplasty, Replacement, Hip - methods
Bone Density
bone mineral density
Chromium
Cobalt
Female
hip arthroplasty
Hip Prosthesis
Humans
Male
metal-on-metal
Middle Aged
Operative Time
Orthopedics
Polyethylene
Prospective Studies
Prosthesis Design
resurfacing hip arthroplasty
Surgery, Computer-Assisted
threaded acetabular component
Titanium
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Summary:Abstract A randomized controlled trial was performed to evaluate acetabular bone mineral density (BMD) changes after hip resurfacing (RHA) versus an established conventional total hip arthroplasty (THA). A total of 71 patients were allocated randomly to receive either an RHA press-fit cobalt–chromium cup ( n = 38) or a THA with a threaded titanium cup and polyethylene-metal-inlay insert ( n = 33). The BMD in five separate periacetabular regions of interest (ROI) was prospectively quantified preoperative until 24 months. We conclude that, in contrast to our hypothesis, periacetabular BMD was better preserved after RHA than after placement of a conventional THA. Long term follow-up studies are necessary to see whether this benefit in bone preservation sustains over longer time periods and whether it is turned into clinical benefits at future revision surgery.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2012.08.025