Influence of Screw Length and Bone Quality on Pedicle Screw Anchorage Under Cyclic Fatigue Loading

Global Spine Journal 2026 Open access

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Authors: Friederike Eva Roch, Betül Tekin, Katharina Jäckle, Marc‐Pascal Meier, Friederike Sophie Klockner, Hassan Awan Malik, Wolfgang Lehmann, Lukas Weiser, Paul Jonathan Roch
DOI: 10.1177/21925682261442309
Cited by: 1
References: 12

Abstract

Study Design Cadaveric biomechanical analysis. Objectives The specific vertebral region that contributes most critically to pedicle screw fixation remains controversial. This study evaluates screw anchorage under cyclic fatigue loading to determine how bone quality affects the relative contributions of the pedicle and vertebral body to stability. Methods Twelve human lumbar vertebrae (L1–L4) from donors aged 71.3 ± 14.2 years were selected, including six with normal bone density (>120 mg/cm 3 ) and six osteoporotic (

Fields of Study & Subjects

Spinal Fractures and Fixation Techniques Scoliosis diagnosis and treatment Spine and Intervertebral Disc Pathology

Publication details

Journal / source
Global Spine Journal
Publisher
SAGE Publications
Volume
16
Issue
7
Pages
21925682261442309–21925682261442309
Publication date
13 April 2026
Language
EN