Pullout resistance of conventional pedicle screw implantation in comparison to fluoroscopic computer-assisted technique

Aim of the study was to compare pullout resistance of pedicle screws after conventional and fluoroscopic computer-assisted implantation in the cadaveric thoracic and lumbar spine. Pedicle screws were inserted in a total of 10 vertebrae of different human specimens: 10 screws were placed using conven...

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Bibliographic Details
Published inZentralblatt für Chirurgie Vol. 131; no. 5; p. 407
Main Authors Linhardt, O, Perlick, L, Renkawitz, T, Matussek, J, Plitz, W, Grifka, J
Format Journal Article
LanguageGerman
Published Germany 01.10.2006
Subjects
Aged
Aged, 80 and over
Biomechanical Phenomena
Bone Wires
Cadaver
Data Interpretation, Statistical
Female
Fluoroscopy
Humans
Lumbar Vertebrae - surgery
Male
Middle Aged
Spine - surgery
Surgery, Computer-Assisted
Thoracic Vertebrae - surgery
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Summary:Aim of the study was to compare pullout resistance of pedicle screws after conventional and fluoroscopic computer-assisted implantation in the cadaveric thoracic and lumbar spine. Pedicle screws were inserted in a total of 10 vertebrae of different human specimens: 10 screws were placed using conventional technique (group 1) and 10 screws were inserted with fluoroscopic computer-assisted system contralaterally (group 2). Then pedicle screws were evaluated for biomechanical axial pullout resistance. Mean pullout force was 232 N (range 60-600 N) in group 1 and 353 N (range 112-625 N) in group 2. The difference was significant (p=0,0425). Fluoroscopic navigated implantation of pedicle screws increases the pullout strength in thoracic and lumbar cadaveric spines as compared with conventional methods.
ISSN:0044-409X
DOI:10.1055/s-2006-950383