Experimental study on the loosening of pedicle screws implanted to synthetic bone vertebra models and under non-pull-out mechanical loads

摘要

Background: Pull-out tests have been widely applied to orthopaedic devices such as pedicle screws for the last decades. Despite their wide applicability, this particular pedicle screw testing method does not represent the load pattern of implanted vertebrae with the use of pedicle screw spinal constructs.