title: [Influence of preoperative bone mass density in periprosthetic bone remodeling after implantation of ABG-II prosthesis: A 10-year follow-up].
abstract: BACKGROUND
  Preoperative bone mass index has shown to be an important factor in peri-prosthetic bone remodelling in short follow-up studies.
  
  
  METHODS
  Bone density scans (DXA) were used to perform a 10-year follow-up study of 39 patients with a unilateral, uncemented hip replacement. Bone mass index measurements were made at 6 months, one year, 3 years, 5 years, and 10 years after surgery. Pearson coefficient was used to quantify correlations between preoperative bone mass density (BMD) and peri-prosthetic BMD in the 7 Gruen zones at 6 months, one year, 3 years, 5 years, and 10 years.
  
  
  RESULTS
  Pre-operative BMD was a good predictor of peri-prosthetic BMD one year after surgery in zones 1, 2, 4, 5 and 6 (Pearson index from 0.61 to 0.75). Three years after surgery it has good predictive power in zones 1, 4 and 5 (0.71-0.61), although in zones 3 and 7 low correlation was observed one year after surgery (0.51 and 0.57, respectively). At the end of the follow-up low correlation was observed in the 7 Gruen zones. Sex and BMI were found to not have a statistically significant influence on peri-prosthetic bone remodelling.
  
  
  CONCLUSIONS
  Although preoperative BMD seems to be an important factor in peri-prosthetic remodelling one year after hip replacement, it loses its predictive power progressively, until not being a major factor in peri-prosthetic remodelling ten years after surgery.
authors: Cirugía Ortopédica y Traumatología, Hospital Miguel Servet, Zaragoza, España. Electronic address: aaguilarez@gmail.com.
authors: A
authors: A
authors: Aguilar Ezquerra
authors: Cirugía Ortopédica y Traumatología, Hospital Miguel Servet, Zaragoza, España.
authors: J J
authors: JJ
authors: Panisello Sebastiá
authors: Cirugía Ortopédica y Traumatología, Hospital Miguel Servet, Zaragoza, España.
authors: J
authors: J
authors: Mateo Agudo
mesh_terms: D015502:Absorptiometry, Photon; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation; D015519:Bone Density; D016723:Bone Remodeling / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000502:physiology* / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D011184:Postoperative Period; D057234:Preoperative Period; D011446:Prospective Studies
keywords: Absorciometría dual con rayos X; Bone remodeling; Densidad de masa ósea preoperatoria; Dual-energy X ray absorptiometry; Non-cemented stem; Pre-operative bone mass density; Remodelado óseo; Vástago no cementado