Influence of preoperative bone mass density in periprosthetic bone remodeling after implantation of ABG-II prosthesis: A 10-year follow-up

• Published in: Revista española de cirugía ortopédica y traumatología 2016-01, Vol.60 (1), p.53-58
• Main Authors: Aguilar Ezquerra, A, Panisello Sebastiá, J J, Mateo Agudo, J
• Format: Article
• Language: Spanish
• ISSN: 1988-8856
• DOI: 10.1016/j.recot.2015.05.008

INTRODUCTIONPreoperative bone mass index has shown to be an important factor in peri-prosthetic bone remodelling in short follow-up studies.MATERIAL AND METHODSBone 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.RESULTSPre-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.CONCLUSIONAlthough 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.