A protocol to evaluate semi-rigid pedicle screw systems |
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Authors: | JD Clausen VK Goel K Sairyo M Pfeiffer |
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Affiliation: | Iowa Spine Research Center, Department of Biomedical Engineering, University of Iowa, Iowa City 52242, USA. |
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Abstract: | The objective of the current study was to develop an in vitro testing protocol to evaluate semi-rigid pedicle screw devices. A corpectomy model protocol exists to evaluate rigid spinal implants; however, semi-rigid devices are contraindicated for this condition. This paper describes a technique that simulates more closely the conditions a semi-rigid device would see in vivo. Finally, the new testing protocol is used to evaluate the DDS pedicle screw-cable system. Benefits and shortcomings of the new protocol are discussed. |
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