Back to Journals » Medical Devices: Evidence and Research » Volume 1

Transpedicular screw fixation in the thoracic and lumbar spine with a novel cannulated polyaxial screw system

Authors Weise L, Suess O, Picht T, Kombos T

Published 13 October 2008 Volume 2008:1 Pages 33—39


Review by Single anonymous peer review

Peer reviewer comments 3

Download Article [PDF] 

Lutz Weise, Olaf Suess, Thomas Picht, Theodoros Kombos

Neurochirurgische Klinik, Charité – Universitätsmedizin Berlin, Berlin, Germany

Objective: Transpedicular screws are commonly and successfully used for posterior fixation in spinal instability, but their insertion remains challenging. Even using navigation techniques, there is a misplacement rate of up to 11%. The aim of this study was to assess the accuracy of a novel pedicle screw system.

Methods: Thoracic and lumbar fusions were performed on 67 consecutive patients for tumor, trauma, degenerative disease or infection. A total of 326 pedicular screws were placed using a novel wire-guided, cannulated, polyaxial screw system (XIA Precision®, Stryker). The accuracy of placement was assessed post operatively by CT scan, and the patients were followed-up clinically for a mean of 16 months.

Results: The total medio-caudal pedicle wall perforation rate was 9.2% (30/326). In 19 of these 30 cases a cortical breakthrough of less than 2 mm occurred. The misplacement rate (defined as a perforation of 2 mm or more) was 3.37% (11/326). Three of these 11 screws needed surgical revision due to neurological symptoms or CSF leakage. There have been no screw breakages or dislocations over the follow up-period.

Conclusion: We conclude that the use of this cannulated screw system for the placement of pedicle screws in the thoracic and lumbar spine is accurate and safe. The advantages of this technique include easy handling without a time-consuming set up. Considering the incidence of long-term screw breakage, further investigation with a longer follow-up period is necessary.

Keywords: spinal instrumentation, pedicle screws, misplacement, pedicle wall perforation

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]