A biomechanical analysis of multi-level reconstruction model for osteoporotic spine –investigation of optimal approach for spinal instrumentation-

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K09546
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 56020:Orthopedics-related
• Research Institution: Kanazawa University
• Principal Investigator: Demura Satoru 金沢大学, 附属病院, 准教授 (00348228)
• Co-Investigator(Kenkyū-buntansha): 田原 大輔 龍谷大学, 理工学部, 准教授 (20447907)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 成人脊柱変形 / 骨粗鬆症 / 脊椎固定術 / 脊椎矢状面バランス / 有限要素解析

Outline of Final Research Achievements

No previous studies have employed FE analysis to evaluate long-instrumented spinal fusion for ASD with osteoporosis. We evaluated mechanical stress in long spinal instrumentation among FE models differing with respect to spinal balance, fusion length, and implant type. The spinal balance is anteriorly tilted, the range of fixation is short, and the use of pedicle screws for the upper instrumented vertebra results in greater stresses on the vertebrae and the implants.

Free Research Field

整形外科

Academic Significance and Societal Importance of the Research Achievements

本研究において、脊椎バランスに応じた手術範囲の設定や固定生体材料の組み合わせの一部が明らかとなった。臨床的に骨粗鬆症を有する成人脊柱変形治療において、術後の金属インプラント合併症低減に貢献することができると考える。さらに今後、既存の金属製内固定材以外の最適な力学特性を有する生体材料の開発にもつなげるべく、研究を推進していきたい。