ArticleJournal of orthopaedic surgery and research2025
Evaluating the performance of a novel double-threaded dynamic stabilization system: a finite element study.
Article in Journal of orthopaedic surgery and research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveTo evaluate the biomechanical performance of a novel dual-cord and dual-spacer posterior dynamic stabilization system compared to a conventional single-threaded construct.
methodsA validated finite element (FE) model of the L1-S1 lumbar spine was developed. Posterior dynamic stabilization was simulated at the L4-L5 segment using two systems: a traditional polyethylene terephthalate (PET) cord with polycarbonate urethane (PCU) spacer (single-threaded), and a dual PET cord-spacer construct. Both systems were analyzed under full range of motion (ROM) loading and physiological loads using Abaqus software to simulate stress distribution and motion.
resultsThe dual-cord system enhanced segmental stability at L4-5 by approximately 22% while preserving adjacent level mobility within normal physiological limits. Peak stress levels on implant components increased marginally but remained within safe thresholds.
conclusionThe dual-cord dynamic stabilization system demonstrates improved biomechanical stability with minimal adjacent segment compromise. These results support its potential for reducing long-term mechanical failure risks in lumbar stabilization.
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