title: [Cemented versus cementless revision femoral stems using morselized allograft--a prospective, randomized study with 5 years follow-up].
abstract: BACKGROUND
  There are only few studies on hip revision using the impaction grafting technique. Furthermore, data on cementless femoral stems as compared to cemented and polished femoral stems are lacking. We wanted to determine whether cementless femoral stems were equally good in preserving bone mineral density around the femoral stem and in functional outcome.
  
  
  METHODS
  Consecutively 14 patients needing hip revisions for aseptic loosening in the stem with bone stock deficiency Paparowsky grade II were randomized into two groups intraoperatively. Morselized fresh-frozen bone allografts were impacted in both groups. The cemented group received polished Landos Fjord-CrCo stems and the uncemented group received the hydroxyapatite-coated Landos Corail-Titan stems. The dual energy X-ray absorptiometry was used to measure bone mineral density around the femoral stem according to Gruen zones. Function was measured by Merle d'Aubigné score. Patients were controlled at 0.5, 3, 6, 9, 12, 18, 24, 36 and 60 months postoperatively.
  
  
  RESULTS
  There was no statistical difference between the BMD loss in the cemented vs. the uncemented group. The BMD loss was between 0-10 % in distal Gruen zones and was between 10-20 % in proximal Gruen zones. Functional scores were similar and reached a plateau of 16 in the Merle d'Aubigné score after 6 months.
  
  
  CONCLUSIONS
  Cemented technique in hip revisions using morselized bone allograft is as good as uncemented technique in preserving BMD measured by the DEXA method and restoring function in a 5 years follow-up.
authors.affiliation: Orthopädische Klinik, Nordland Sentralsykehus, Bodø, Norway.
authors.forename: E
authors.initials: E
authors.lastname: Nesse
authors.forename: E Waage
authors.initials: EW
authors.lastname: Nielsen
authors.forename: D
authors.initials: D
authors.lastname: Bastian
mesh_terms: D015502:Absorptiometry, Photon; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001843:Bone Cements / Q000627:therapeutic use*; D015519:Bone Density / Q000502:physiology; D001851:Bone Diseases, Metabolic / Q000175:diagnosis / Q000601:surgery*; D016025:Bone Transplantation / Q000379:methods*; D005260:Female; D005269:Femur / Q000601:surgery; D005500:Follow-Up Studies; D005839:Gentamicins / Q000627:therapeutic use*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008768:Methylmethacrylates / Q000627:therapeutic use*; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation / Q000379:methods
chemical_list: D001843:Bone Cements; D005839:Gentamicins; D008768:Methylmethacrylates; C030159:gentamicin-polymethylmethacrylate bead