A cadaveric biomechanical study designed to test between the pullout strength and the finite element method (FEM)

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K10408
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Orthopaedic surgery
• Research Institution: The University of Tokushima
• Principal Investigator: HIGASHINO Kosaku 徳島大学, 大学院医歯薬学研究部(医学系), 徳島大学専門研究員 (80380129)
• Co-Investigator(Kenkyū-buntansha): 西良 浩一 徳島大学, 大学院医歯薬学研究部(医学系), 教授 (10304528) ; 高田 洋一郎 徳島大学, 大学院医歯薬学研究部(医学系), 特任講師 (20420549) ; 森本 雅俊 徳島大学, 病院, 医員 (20748701) ; 福井 義浩 徳島大学, 大学院医歯薬学研究部(医学系), 教授 (50144168) ; 酒井 紀典 徳島大学, 大学院医歯薬学研究部(医学系), 准教授 (80403731)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: pedicle screw / biomechanics / re-directed screw / thoracolumbar spine / pullout strength

Outline of Final Research Achievements

Screw malposition is one of the main pitfalls of inserting pedicle screws. Intraoperatively a malpositioned screw is re-directed and inserted along the correct axis. To evaluate the pullout strength of redirected pedicle screws with a larger diameter following lateral wall breach, redirected pedicle screws of the same diameter following medial wall breach, and redirected pedicle screws with a larger diameter following medial wall breach. The pullout strength of re-directed pedicle screws after either a lateral pedicle breach or medial pedicle breach is significantly less than the pullout strength of correctly aligned screw. Redirected pedicle screws of larger diameter after a lateral or medial pedicle breach show recovery of pullout strength.

Free Research Field

医歯薬学