Original ResearchThe filling proportion of bone cement affects recollapse of vertebrae after percutaneous vertebral augmentation: A retrospective cohort study

- Determine the relationship between filling proportion of bone cement in the vertical direction and incidence of recollapse.
- Assess the effect of vertebral augmentation from the perspective of radiology.
- We designed a new method to avoid the measurement bias of taking photos and checking methods.

Background and objectivesThe aim of this study was to determine the relationship between filling proportion of bone cement in the vertical direction and incidence of recollapse in the augmented vertebrae after vertebral augmentation.MethodsFifty-one patients (51 vertebrae) who had operations between January 2014 and July 2016 with a mean age of 78.10 years were included. All patients in our department of spine surgery were advised to have follow-up care every 6 months. Patients characteristics, radiographic outcomes were evaluated.ResultsThe recollapse of augmented vertebral body occurred in 10 of 51 vertebrae (20%).ConclusionPatients with a high proportion rate of bone cement in the middle vertical direction have a low incidence of experiencing recollapse.