Analysis of bone cement distribution around fenestrated pedicle screws in low bone quality lumbosacral vertebrae.

Purpose: To study the exact distribution of bone cement around augmented fenestrated pedicle screws in both lumbar and sacral vertebrae of patients with low bone quality.

Methods: A total of 37 patients with instrumented lumbar fusion were investigated. 3D computed tomography virtual models of the injected cement and screws were obtained.