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[Bony sacroiliac corridor : A virtual volume model for the accurate insertion of transarticular screws.]
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 1193341
Author(s) Mendel, T; Appelt, K; Kuhn, P; Suhm, N
Author(s) at UniBasel Suhm, Norbert
Year 2008
Title [Bony sacroiliac corridor : A virtual volume model for the accurate insertion of transarticular screws.]
Journal Der Unfallchirurg
Volume 111
Number 1
Pages / Article-Number 19-26
Keywords iliosacral screws, sacrum, sacroiliac joint, volume model, computer-assisted surgery
Abstract BACKGROUND: Minimally invasive sacroiliac (SI) screw fixation carries a high risk for implant malposition. Only idealised shape conceptions of the safe bony corridor exist. METHODS: Two SI corridor models were generated based on a 3D CT reconstruction of a human pelvis. Therefore two penetration depths of the screws into the sacrum were defined. RESULTS: By inserting screws into the centre of the first sacral body an osseous volume of 121 cm(3) and an iliac entrance area of 53 cm(2) were utilizable. Screw positioning beyond the opposite sacral isthmus leads to a reduction of the bony volume to 72 cm(3) (60%) and a decrease of the iliac screw entrance to 20 cm(2) (38%). CONCLUSION: The computed realistic 3D models provide exact references to confining bone structures for safe screw positions. The implementation of a software algorithm for fully automated calculation of such volumes based on fluoroscopic or CT images could enhance the performance of computer-assisted navigation systems.
Publisher Springer
ISSN/ISBN 0177-5537
edoc-URL http://edoc.unibas.ch/dok/A6003584
Full Text on edoc No
Digital Object Identifier DOI 10.1007/s00113-007-1386-4
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/18210034
ISI-Number WOS:000252690000003
Document type (ISI) Journal Article
 
   

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