Changes in periprosthetic bone density in patients with artificial hip revisions

OBJECTIVE: To measure the periprosthetic bone density of the proximal femur in 9 patients with artificial hip revision using dual-energy X-ray bone densitometry (DEXA), and to understand the periprosthetic bone loss in patients with artificial hip revision. METHODS: Nine patients who underwent initial artificial total hip revision surgery due to loosening of the prosthesis had their bilateral proximal femoral bone density measured by dual-energy X-ray bone densitometry (DEXA) in comparison, and the division of the measurement area was performed using the Gruen seven-zone method. Preoperative clinical evaluation was standardized by Harris Hip Score (HHS). RESULTS: Nine patients had a HHS score of 61, and DEXA measurements showed that all patients had a statistically significant decrease in BMD on the operated side compared with the non-operated side, ranging from 8.9% to 27.6%, with an average of 15.4% (P < 0.05). CONCLUSION: In patients with early and mid-term failure after artificial hip arthroplasty, bone loss around the proximal femoral prosthesis was obvious.