ArticleJournal of the Chinese Medical Association : JCMA2025
Risk factors for screw loosening in patients with lumbar degenerative spondylolisthesis treated with Dynesys dynamic stabilization.
Article in Journal of the Chinese Medical Association : JCMA, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Role of paraspinal muscle fatty infiltration in predicting adjacent segment disease after lumbar spinal fusion: a systematic review and meta-analysis.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 · 2026Review
- Biomechanical analysis of the interlaminar dynamic stabilization system (IntraSPINE) in unilateral biportal endoscopic discectomy for huge lumbar disc herniation: a finite element study.BMC musculoskeletal disorders · 2026Article
- The clinical efficacy of hybrid surgery based on the Waveflex semi-rigid dynamic internal fixation system for the treatment of lumbar degenerative diseases: over three-year follow-up study.BMC musculoskeletal disorders · 2025Article
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Authors and funding
6 authors.
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Abstract
backgroundPosterior decompression with Dynesys dynamic stabilization (DDS) is an effective treatment option for degenerative spondylolisthesis. However, postoperative pedicle screw loosening (PSL) often results in poor outcomes. Determining possible risk factors may aid in making informed decisions. This study aimed to evaluate the incidence and risk factors for PSL in patients who underwent elective DDS.
methodsWe conducted a retrospective analysis of 94 patients with L4-L5 grade I degenerative spondylolisthesis who underwent DSS at a single academic institution between May 2008 and February 2015. Screw loosening was defined as the presence of a halo or double-halo sign on plain radiography.
resultsThe rate of screw loosening was 4.8% among screws and 11.7% among patients. Multivariable analysis revealed that age >65 years, smoking, segmental range of motion (ROM) >13°, and L1 vertebral body Hounsfield unit <110 were risk factors for PSL after DDS. Five reoperations were performed; however, no instances of screw breakage were observed.
conclusionOur study identified risk factors for PSL after DDS, including older age, smoking, larger preoperative segmental ROM, and lower L1 vertebral body HU, which could assist in preoperative decision-making and surgical planning.
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