Ausrissfestigkeit implantierter Pedikelschrauben in konventioneller und fluoroskopisch-navigierter Technik

Autor: L. Perlick, J. Grifka, J. Matussek, W. Plitz, T. Renkawitz, O. Linhardt
Rok vydání: 2006
Předmět:
Zdroj: Zentralblatt für Chirurgie. 131:407-410
ISSN: 1438-9592
0044-409X
DOI: 10.1055/s-2006-950383
Popis: Aim 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. Methods 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. Results 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). Conclusion Fluoroscopic navigated implantation of pedicle screws increases the pullout strength in thoracic and lumbar cadaveric spines as compared with conventional methods.
Databáze: OpenAIRE