A protocol to evaluate semi-rigid pedicle screw systems.
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.
Clausen
J D
JD
Iowa Spine Research Center, Department of Biomedical Engineering, University of Iowa, Iowa City 52242, USA.
Goel
V K
VK
Sairyo
K
K
Pfeiffer
M
M
D001863:Bone Screws; D004867:Equipment Design; D004868:Equipment Failure; D008422:Materials Testing; D013123:Spinal Fusion / Q000295:instrumentation*; D013718:Tensile Strength