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Background  To determine the related imaging findings and risk factors to refracture of the cemented vertebrae after percutaneous vertebroplasty (PVP) treatment.    Methods  Patients who were treated with PVP for single vertebral compression fractures (VCFs) and met this study’s inclusion criteria were retrospectively reviewed from January 2012 to January 2019. The follow-up period was at least 2 years. Forty-eight patients with refracture of the cemented vertebrae and 45 non-refractured patients were included. The following variates were reviewed: age, sex, fracture location, bone mineral density (BMD), intravertebral cleft (IVC), kyphotic angle (KA), wedge angle, endplate cortical disruption, cement volume, surgical approach, non-PMMA-endplate-contact (NPEC), cement leakage, other vertebral fractures, reduction rate (RR), and reduction angle (RA). Multiple logistic regression modeling was used to identify the independent risk factors of refracture.    Results  Refracture was found in 48 (51.6%) patients. Four risk factors, including IVC ( P  = 0.005), endplate cortical disruption ( P  = 0.037), larger RR ( P  = 0.007), and NPEC ( P  = 0.006) were found to be significant independent risk factors for refracture.    Conclusions  Patients with IVC or larger RR, NPEC, or endplate cortical disruption have a high risk of refracture in the cemented vertebrae after PVP.

Refracture of the cemented vertebrae after percutaneous vertebroplasty: risk factors and imaging findings