title: 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-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.
authors.affiliation: Department of Orthopaedics, Rijnstate Hospital, Arnhem, The Netherlands.
authors.forename: José M H
authors.initials: JM
authors.lastname: Smolders
authors.forename: Dean F
authors.initials: DF
authors.lastname: Pakvis
authors.forename: Baudewijn W
authors.initials: BW
authors.lastname: Hendrickx
authors.forename: Nico
authors.initials: N
authors.lastname: Verdonschot
authors.forename: Job L C
authors.initials: JL
authors.lastname: van Susante
mesh_terms: D015502:Absorptiometry, Photon; D000704:Analysis of Variance; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D015519:Bone Density; D002857:Chromium; D003035:Cobalt; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D061646:Operative Time; D020959:Polyethylene; D011446:Prospective Studies; D011474:Prosthesis Design; D025321:Surgery, Computer-Assisted; D014025:Titanium
chemical_list: D002857:Chromium; D003035:Cobalt; D020959:Polyethylene; D014025:Titanium