Effect of pedicle screw misplacement on the pull-out strength using personalized finite element modeling

• Published in: Computers in biology and medicine Vol. 183; p. 109290
• Main Authors: Rouyin, A., Nazemi, H., Arjmand, N., Einafshar, M.J.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 01.12.2024; Elsevier Limited
• Subjects: Adult; Biomechanics; Bones; Boolean; Classification; Computed tomography; Customization; Damage assessment; Finite Element Analysis; Finite element method; Fractures; Geometry; Humans; Internal Medicine; Loosening; Lumbar Vertebrae - diagnostic imaging; Lumbar Vertebrae - surgery; Male; Material properties; Mathematical models; Mechanical properties; Modelling; Other; Pedicle screw misplacement; Pedicle Screws; Pull out tests; Pull-out strength; Simulation; Spine (lumbar); Subject-specific modeling; Tomography, X-Ray Computed; Vertebrae; Belgium; Pull-out strength; Finite element analysis; Subject-specific modeling; Pedicle screw misplacement

Intraoperative misplacement of vertebral pedicle screws is prevalent. While a pedicle screw misplacement of up to 4 mm is often considered safe by clinical standards, this may reduce the pull-out strength thereby increasing the risk of postoperative screw loosening. This study aimed to compare the p...