Contemporary less invasive spinal instrumentation for AO C-type posterior pelvic ring injuries

Abstract

Objective

This study evaluates efficacy and safety of contemporary spinal instrumentation for AO/type C posterior pelvic ring (PPR) injuries.

Methods

Twenty-two consecutive patients, aged 36 ± 17 years, were managed with spinal instrumentation with spinopelvic fixation (SPF) or non-spinopelvic fixation (NSPF) and less invasive surgery. There were 16 vertically unstable sacral fractures and six iliosacral dislocations. Matta score was used for fragment diastasis and Majeed’s score for functional outcome evaluation.

Results

All patients were followed for 61 ± 8 months postoperatively. The operative time was less in NSPF (P < 0.001). SPF was applied in six cases and NSPF in 16 cases. Postoperatively, fragment diastasis was reduced from 16 ± 13 to 2.6 ± 3.8 mm (P < 0.000). There was no statistically significant difference in fracture reduction between SPF and NSPF (P = 0.16). Majeed score was 83 ± 16 postoperatively. There was a significant correlation between Matta score and Majeed score (P = 0.013). There were two cases with spinal instrumentation failure. Low-grade infection occurred in one patient, without hardware failure, that was eradicated after hardware removal. From ten patients with incomplete neurologic impairment on admission, eight showed postoperatively full and two partial recovery without direct sacral decompression. Patients with preoperative neurologic impairment showed lower postoperative Majeed score than those without neurologic impairment (P = 0.027). There was no correlation between neurologic impairment and recovery and type of PPR injury.

Conclusions

SPF and NSPF with contemporary spinal instrumentation for C AO-type PPR injury with less invasive methods are safe and effective techniques that reduce and maintain PPR disruption allowing early mobilization, neurologic recovery and improved Majeed score.

Graphic abstract

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Acknowledgements

The authors wish to express their appreciation to Alkis Korovesis, MSc Dipl. Engineer, for his assistance in statistical analysis of the data.

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Correspondence to Panagiotis Korovessis.

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Korovessis, P., Spastris, P., Syrimpeis, V. et al. Contemporary less invasive spinal instrumentation for AO C-type posterior pelvic ring injuries. Eur Spine J 29, 2521–2533 (2020). https://doi.org/10.1007/s00586-019-06180-1

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Keywords

  • Less invasive
  • Spinal instrumentation
  • Pelvic ring fractures
  • Spinopelvic fixation