ArticleGlobal spine journal2024
How to Optimize Pedicle Screw Parameters for the Thoracic Spine? A Biomechanical and Finite Element Method Study.
Article in Global spine journal, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed, 19 citations in OpenAlex.
- Orthopedic Biomaterials in the Clinical Reconstruction of Osteoporotic Atlantoaxial Injuries: A Review.Bioengineering (Basel, Switzerland) · 2026Review
- Article
- Cervical Pedicle Inlet Screws: Clinical Results of a Novel Trajectory for Navigated Screw Placement in the Sub-axial Cervical Spine.Global spine journal · 2026Article
- Effects of running speed on the probability of meniscal failure in the knee joint: based on finite element analysis and the Weibull failure model.BMC musculoskeletal disorders · 2025Article
- Measurement of the sustentaculum tali range and biomechanical screw analysis based on the space shape of the calcaneal trabeculae.BMC musculoskeletal disorders · 2025Article
- Radiographic parameters and feasibility analysis of dual sacral-2 alar-iliac screw fixation using three-dimensional digital technology.BMC musculoskeletal disorders · 2025Article
- Comparison of open and percutaneous navigated pedicle screw placement for traumatic injuries of the subaxial cervical spine.Brain & spine · 2025Article
- Article
- Impact of screw tip design on screw anchorage: mechanical testing and numerical simulation.Journal of orthopaedic surgery and research · 2024Article
- The effect of large channel-based foraminoplasty on lumbar biomechanics in percutaneous endoscopic discectomy: a finite element analysis.Journal of orthopaedic surgery and research · 2024Article
- SSDL-an automated semi-supervised deep learning approach for patient-specific 3D reconstruction of proximal femur from QCT images.Medical & biological engineering & computing · 2024Article
- Biomechanical analysis of the tandem spinal external fixation in a multiple-level noncontiguous lumbar fractures model: a finite element analysis.Frontiers in bioengineering and biotechnology · 2024Article
- Acetabular Wall Weakening in Total Hip Arthroplasty: A Pilot Study.Pathophysiology : the official journal of the International Society for Pathophysiology · 2023Article
- Incomplete insertion of pedicle screws triggers a higher biomechanical risk of screw loosening: mechanical tests and corresponding numerical simulations.Frontiers in bioengineering and biotechnology · 2023Article
- Implications of navigation in thoracolumbar pedicle screw placement on screw accuracy and screw diameter/pedicle width ratio.Brain & spine · 2023Article
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
STUDY
designPedicle screw study.
objectiveThe selection of pedicle screw parameters usually involves the surgeon's analysis of preoperative CT imaging along with anatomical landmarks and tactile examination. However, there is minimal consensus on a standardized guideline for selection methods on pedicle screws. We aimed to determine the effects of thoracic screw diameter to pedicle width on pullout strength determined by cortical bone purchase.
methodsBiomechanical study performed with human cadaveric thoracic vertebrae and experimentally validated three-dimensional finite element model instrumented with pedicle screws of various diameters. We used a variable (SD/PW) ratio to express the screw selection. We hypothesized a positive correlation between the pullout load determined by the bone purchase and the SD/PW. This relationship was first investigated in a validated finite element model considering bone purchase related to the strength of an upper thoracic vertebra. Then, the correlation to the entire spine is evaluated.
resultsThe failure load ranged from 371.3 to 1601.0 N, respectively, for 3 and 6 mm screws. The determinant coefficient was increased to R2=.421 when a linear relationship between pullout load and the SD/PW ratio was used. The peak loads of 1216 and 1288N were found for an SD/PW ratio of .83.
conclusionWe have found that the screw pullout load is more correlated to SD/PW than other pedicle measures for a maximized SD/PW ratio of .83. This particular value should be considered the upper limit of the indicated SD/PW ratio and a means to determine the optimal screw diameter to enhance pullout strength.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.