A Protocol to Evaluate Semi-Rigid Pedicle Screw Systems Article (Web of Science)


  • 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.
  • Sairyo, K.
  • Pfeiffer, M.

publication date

  • 1997

number of pages

  • 2

start page

  • 364

end page

  • 366


  • 119


  • 3