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  4. Placement of pedicle screws with different navigation systems : laboratory test with 12 vertebral column specimens
 
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Placement of pedicle screws with different navigation systems : laboratory test with 12 vertebral column specimens

Publikationstyp
Journal Article
Date Issued
2002-04-01
Sprache
German
Author(s)
Reichle, E.
Sellenschloh, Kay  
Biomechanik M-3  
Morlock, Michael  
Biomechanik M-3  
Eggers, Christian C. J.
TORE-URI
https://hdl.handle.net/11420/46683
Journal
Der Orthopäde  
Volume
31
Issue
4
Start Page
368
End Page
371
Citation
Der Orthopäde 31 (4): 368-371 (2002)
Publisher DOI
10.1007/s00132-001-0277-6
Scopus ID
2-s2.0-2242434320
Publisher
Springer
A well-known problem occurring with thoracolumbar spondylodesis is the perforation of pedicle screws through the pedicle wall. It occurs in up to 40% of the implanted screws. To reduce this problem, computed tomography (CT)-based navigation systems have been introduced, which allow the surgeon multidimensional control of the screw position in virtual reality and real time during insertion. In the recent past, fluoroscopy-based navigation systems have also been built. We inserted 77 pedicle screws in human lumbar cadaveric spine specimens either without navigation, with CT-based navigation, or with fluoroscopy-based navigation. In the critical sizes of pedicles between 6.5 and 9 mm, we found the best results with CT-based navigation, but there was no significant difference between the three methods. The minimal pedicle and the screw diameters should be reported in every study on pedicle screw misplacement and spine navigation since they represent the most important factor in pedicle wall perforations.
Subjects
Pedicle diameter
Pedicle screw placement
Spine navigation
DDC Class
610: Medicine, Health
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