[Bony sacroiliac corridor. A virtual volume model for the accurate insertion of transarticular screws].

Der Unfallchirurg
T MendelN Suhm

Abstract

Minimally invasive sacroiliac (SI) screw fixation carries a high risk for implant malposition. Only idealised shape conceptions of the safe bony corridor exist. 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. By inserting screws into the centre of the first sacral body an osseous volume of 121 cm3 and an iliac entrance area of 53 cm2 were utilizable. Screw positioning beyond the opposite sacral isthmus leads to a reduction of the bony volume to 72 cm3 (60%) and a decrease of the iliac screw entrance to 20 cm2 (38%). 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.

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Citations

Aug 30, 2011·Archives of Orthopaedic and Trauma Surgery·David WohlrabThomas Mendel
Aug 21, 2010·Journal of Digital Imaging·Hansrudi NoserThomas Mendel
May 18, 2011·Journal of Orthopaedic Trauma·Michael J Gardner, M L Chip Routt
Jun 26, 2014·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Daniel WagnerHansrudi Noser
Apr 12, 2012·The Journal of Trauma and Acute Care Surgery·Thomas MendelGunther Olaf Hofmann
Nov 19, 2015·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·M A KönigBronek M Boszczyk
Mar 2, 2017·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Daniel WagnerPol M Rommens
May 22, 2019·Archives of Orthopaedic and Trauma Surgery·Daniel WagnerPol M Rommens
Jul 22, 2018·European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society·Josephine Berger-GrochLars Gerhard Grossterlinden

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