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Influence of pelvic tilt correction on PJK occurrence after adult spinal deformity surgery

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Abstract

Introduction

Many risk factors for proximal junctional kyphosis (PJK) have been reported in the literature, especially sagittal alignment modifications, but studies on pelvic tilt (PT) variations and its influence on PJK are missing. Aim of this study was to analyze the influence of pelvic tilt correction, after long fusion surgery for ASD patients, on PJK occurrence.

Methods

A monocentric retrospective study was conducted on prospectively collected data, including 76 patients, operated with fusion extending from the thoraco-lumbar junction to the ilium. Radiologic parameters were measured on fullspine standing radiographs preoperatively, postoperatively (<6 months) and at latest follow-up (before revision surgery or >2 years). All parameters were analyzed comparing patients with PJK (group “PJK”) and without PJK (group “no PJK”). A further analysis compared patients with low (PT/PI<25th percentile, LowPT group) and high (PT/PI>75th percentile, HighPT group) preoperative pelvic tilt.

Results

« PJK » patients had a greater lumbar lordosis and thoracic kyphosis correction (p=0,03 et <0,001 respectively) compared to the “no PJK” patients. Pelvic tilt was significantly lower postoperatively in the “PJK” group (p=0,03). Patients from the HighPT PJK group were significantly more corrected than patients from the HighPT noPJK group (p=0,003).

Conclusion

Through the analysis of 76 patients, we showed that pelvic tilt did not seem to play a role in the setting of PJK after ASD surgery. Decreasing PT after surgery could be an element to watch out for in patients with PJK risk factors.

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Authors and Affiliations

  1. Spine Department, European Hospital Georges Pompidou, Orthopaedic Surgery, Paris, France

    Louise Ponchelet, Marc Khalife, Mikael Finoco, Cedric Duray, Pierre Guigui & Emmanuelle Ferrero

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  1. Louise Ponchelet
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  2. Marc Khalife
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  3. Mikael Finoco
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  4. Cedric Duray
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Correspondence to Louise Ponchelet.

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Competing interests

Dr Khalifé owns share of NovaSpine, which presents no competing interest with the present study. Dr Ferrero is consultant for implanet and Medtronic, which presents no competing interest with the present study. Dr Ponchelet, Dr Finoco, Dr Guigui and Dr Duray present no competing interests with the present study.

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Ponchelet, L., Khalife, M., Finoco, M. et al. Influence of pelvic tilt correction on PJK occurrence after adult spinal deformity surgery. Eur Spine J (2024). https://doi.org/10.1007/s00586-024-08180-2

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