Reinforcement of lumbosacral instrumentation using S1–pedicle screws combined with S2–alar screws

@article{Oa2012ReinforcementOL,
  title={Reinforcement of lumbosacral instrumentation using S1–pedicle screws combined with S2–alar screws},
  author={Dr. H. Koller Oa and Juliane Zenner and Axel Hempfing and Luis Ferraris and Oliver Meier},
  journal={Operative Orthop{\"a}die und Traumatologie},
  year={2012},
  volume={25},
  pages={294-314}
}
Increasing construct stability of lumbosacral instrumentations using S2–ala screws as an alternate to iliac screws. Revision surgery after failed lumbosacral fusion; long instrumentations to the sacrum; L5–S1 fusion without anterior support. Lack of sacral bone stock. Midline approach. The entry point for S2–ala screws is caudal to the posterior S1 foramen and close to the lateral sacral crest. Screw tract preparation for S2–ala screws necessitates 30–45° angulation in the axial plane. Biplanar… CONTINUE READING

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