Prediction of screw loosening by measuring the insertion torque in non-osteoporotic patients: an in vitro study.

ABSTRACT:

Background

Pedicle screws are commonly used in spinal surgeries, but screw loosening remains a major concern, even in non-osteoporotic patients. Predicting pedicle screw stability via the insertion torque is a controversial topic, mainly studied on osteoporotic cadavers. Whether the insertion torque is suitable for patients with healthy bone mineral density (BMD) remains unknown. The aim was to investigate the influencing factors, namely insertion torque, BMD, screw diameter, length, surface area, volume, screw-in rotations, vertebral level, on the screw loosening stability during distractions and to understand if intra-operative predictions are possible.

Methods

Non-osteoporotic thoraco-lumbar vertebrae (n = 50) were used to implant five different pedicle screws (n = 100) w

SUBMITTER: Jansen JU 

PROVIDER: S-EPMC12023477 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature