Insertion torque and pull out strength of GSS pedicle screws in human vertebral bodies: an in vitro biomechanical study for pedicle screw revision / 中华骨科杂志

ABSTRACT

0.05). In Group 2, the mean maximum pull out strength of the GSS screws was 127% of that of the CCD control screws, while the mean maximum pull out strength of the TSRH screws was 64% of that of the CCD control screws. The mean maximum pull out strength of the GSS screws was significantly higher than that of the TSRH screws (P0.05). Conclusion GSS screws offer better anchoring in revision surgery than most of the currently used screws do.