Validation of the primary stability of a shape memory alloy spine pedicle screw

Pedicle screws are well established and have been become an essential tool in spinal surgery. However, complications are common, especially in geriatric patients with poor bone quality. Expandable screws are very promising to improve the osteoporotic bone anchorage. In own previous work a novel shape memory alloy (SMA) pedicle screw concept was developed that braces itself against the osseous environment after implantation by heating to body temperature. The aim of this study is to investigate first the influence of the actuator force.