A finite element-based comparative dynamic biomechanical study of a novel oblique lateral locking plate system (OLLPS) versus traditional internal fixations for oblique lumbar interbody fusion (OLIF) under whole-body vibration

作者：Yue Wang, Xiaoming Fu, Dan He, Shengju Zhu, Sha Tu, Dongyang Zou, Wei Wang · 发表于：Frontiers in Bioengineering and Biotechnology · 年份：2026 · DOI：10.3389/fbioe.2026.1826517 · 研究领域：Spine and Intervertebral Disc Pathology、Scoliosis diagnosis and treatment、Spinal Fractures and Fixation Techniques

Objective: To evaluate the biomechanical performance of the novel OLLPS in OLIF surgery, including its dynamic stability and application safety, thereby providing evidence-based support for optimizing OLIF combined internal fixation strategies. Methods: Five surgical finite element analysis models with OLLPS or traditional internal fixation were established based on a validated L1-S1 intact model. A 400N follower load was applied along the lumbar curvature to simulate partial body weight; simultaneously, a 5Hz, ±40N sinusoidal vertical load was added to L1 vertebral upper surface to simulate whole-body vibration (WBV) during driving on regular paved roads, with a loading duration of 2 s. Post-loading, peak dynamic response parameters of surgical and adjacent segment structures were extracted, and their maximum and minimum values and vibration amplitudes were recorded. Results: Bilateral pedicle screw fixation (BPS) provides the greatest reduction in surgical segment endplate stress (59.41%-60.35% reduction in L5 superior endplate) and cage stress (a maximum reduction of 68.19%), but induces the highest increases in adjacent segment (especially L5/S1) intervertebral disc stress (IDS) and facet joint stress (FJS). OLLPS effectively reduces surgical segment stress; despite its relatively high implant stress, it caused less adjacent segment interference than BPS. 2-screw and 4-screw lateral plate fixations had weaker stress-modulating effects than BPS and OLLPS. Additionally, the...