ArticleBMC musculoskeletal disorders2024
Preoperative and follow-up variations of psoas major muscle are related to S1 screw loosening in patients with degenerative lumbar spinal stenosis.
Article in BMC musculoskeletal disorders, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Does pre-operative psoas muscle cross-sectional area predict post-operative outcomes following lumbar spine fusion surgery?-a systematic review and narrative synthesis.Journal of spine surgery (Hong Kong) · 2026Review
- Article
- Data-Driven Clustering for Risk Stratification of Unfavorable Outcomes After Lumbar Fusion Surgery: A Development Study.Neurospine · 2026Article
- Percutaneous modified iliac screw fixation: technique and clinical experience.Acta neurochirurgica · 2026Article
- Risk factors for pedicle screw loosening: a comprehensive review.Journal of orthopaedic surgery and research · 2025Review
- Early-stage lumbar paraspinal muscle injury: endoscopic versus transforaminal lumbar interbody fusion: a retrospective comparative analysis.Journal of orthopaedic surgery and research · 2025Article
- S1 Pedicle Screw Loosening: A Systematic Review and Meta-Analysis of Risk Factors and Outcomes.International journal of spine surgery · 2025Article
- Fatty infiltration in the multifidus predicts screw-loosening following short-segment decompression and fusion: proof of why we should protect and rehabilitate the paraspinal muscles.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 · 2025Article
- Innovative Approaches for the Treatment of Spinal Disorders: A Comprehensive Review.Journal of orthopaedics and sports medicine · 2025Article
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Authors and funding
7 authors.
Funding
Abstract
backgroundIt was reported the paraspinal muscle played an important role in spinal stability. The preoperative paraspinal muscle was related to S1 screw loosening. But the relationship between preoperative and postoperative change of psoas major muscle (PS) and S1 pedicle screw loosening in degenerative lumbar spinal stenosis (DLSS) patients has not been reported. This study investigated the effects of preoperative and follow-up variations in the psoas major muscle (PS) on the first sacral vertebra (S1) screw loosening in patients with DLSS.
methods212 patients with DLSS who underwent lumbar surgery were included. The patients were divided into the S1 screw loosening group and the S1 screw non-loosening group. Muscle parameters were measured preoperatively and at last follow-up magnetic resonance imaging. A logistic regression analysis was performed to investigate the risk factors for S1 screw loosening.
resultsThe S1 screw loosening rate was 36.32% (77/212). The relative total cross-sectional areas and relative functional cross-sectional areas (rfCSAs) of the PS at L2-S1 were significantly higher after surgery. The increased rfCSA values of the PS at L3-S1 in the S1 screw non-loosening group were significantly higher than those in the S1 screw loosening group. The regression analysis showed male, lower CT value of L1 and longer segment fusion were independent risk factors for S1 screw loosening, and postoperative hypertrophy of the PS was a protective factor for S1 screw loosening.
conclusionsCompared to the preoperative muscle, the PS size increased and fatty infiltration decreased after surgery from L2-3 to L5-S1 in patients with DLSS after short-segment lumbar fusion surgery. Postoperative hypertrophy of the PS might be considered as a protective factor for S1 screw loosening. MRI morphometric parameters and postoperative selected exercise of PS for DLSS patients after posterior lumbar fusion surgery might contribute to improvement of surgical outcome.
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