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Development of biomechanical database for osteotomy around the knee

Research Project

Project/Area Number 21K16672
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionHokkaido University

Principal Investigator

Iwasaki Koji  北海道大学, 医学研究院, 特任助教 (40771895)

Project Period (FY) 2021-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords変形性膝関節症 / 膝周囲骨切り術 / バイオメカニクス / 加速度 / 動作解析 / 三次元動作解析 / 加速度センサー / 骨切り術
Outline of Research at the Start

内側型変形性膝関節症に対する膝関節周囲骨切り術は、下肢アライメントを矯正することで、片側のコンパートメントにかかる負荷を減少させ、除痛を図る手術である。アライメントの矯正目標は、患者背景に関わらず一律で行われていること多いが、下肢アライメント以外の要因も骨切り術の成績に大きな影響を及ぼすため、患者個人の背景に最適化された矯正が骨切り術の成績の向上に必要である。そのためには二次元の下肢アライメント矯正に伴う三次元的な歩容変化と最終的な患者満足度を大規模に調査し、その大規模データを解析することで、個々の背景に最適化された手術計画を建てることができるシステムの構築を行う。

Outline of Final Research Achievements

Based on data from patients who underwent three-dimensional gait analysis, we developed a novel parameter(Pelvis-Knee-Ankle angle (PKA)), which demonstrated a stronger correlation with KAM and PROMs before and after open-wedge high tibial osteotomy (OWHTO), compared to HKA. PKA may serve as a biomechanical index for osteotomy around the knee based on load distribution. Additionally, using CT-osteoabsorptiometry, we analyzed regions of high subchondral bone density and found that patients showing an increase in the high-density area in the lateral-most part of the medial compartment, where mechanical stress is predicted to decrease postoperatively, shared a common feature of having MPTA of 94° or greater. These findings provide biomechanical evidence that overcorrection on the tibial side alone may lead to suboptimal surgical outcomes.

Academic Significance and Societal Importance of the Research Achievements

膝周囲骨切り術前後の3次元動作解析、加速度解析データ、CT、MRI画像、及び患者立脚型評価のデータを集積を行った。膝周囲骨切り術は下肢アライメントを矯正することで、荷重分布を変化させることで、除痛、機能改善を図る術式であるが、これまで膝荷重分布を基にした膝周囲骨切り術の指標は明らかになっていなかった。今回開発したPKAはOWHTO術後のKAMとの相関が高く、これを発展させることで、膝周囲骨切り術の治療メカニズム、つまり患者の膝の荷重分布に基づいた膝周囲骨切り術の手術を行うことで、治療成績の向上につながる可能性がある。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2022

All Journal Article (5 results) (of which Peer Reviewed: 4 results) Presentation (6 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Bone Density Distribution Pattern in the Lateral Wall of the Femoral Intercondylar Notch: Implications for the Direct Insertion of the Femoral ACL Attachment2024

    • Author(s)
      Sugawara Yutaro、Iwasaki Koji、Suzuki Yuki、Hishimura Ryosuke、Matsubara Shinji、Matsuoka Masatake、Onodera Tomohiro、Kondo Eiji、Iwasaki Norimasa
    • Journal Title

      Orthopaedic Journal of Sports Medicine

      Volume: 12 Issue: 4 Pages: 1-10

    • DOI

      10.1177/23259671241236807

    • Related Report
      2024 Annual Research Report 2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stress Distribution Patterns of the Femorotibial Joint After Medial Closing-Wedge Distal Femoral Varus Osteotomy: An Evaluation Using Computed Tomography Osteoabsorptiometry2024

    • Author(s)
      Hamasaki Masanari、Kondo Eiji、Iwasaki Koji、Suzuki Yuki、Matsuoka Masatake、Onodera Tomohiro、Yabuuchi Koji、Momma Daisuke、Inoue Masayuki、Yasuda Kazunori、Yagi Tomonori、Iwasaki Norimasa
    • Journal Title

      The American Journal of Sports Medicine

      Volume: 52 Issue: 13 Pages: 3255-3265

    • DOI

      10.1177/03635465241285909

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Paradoxical Change in Subchondral Bone Density in the Medial Compartment of the Proximal Tibial Articular Surface After High Tibial Osteotomy: A Detailed Subchondral Bone Density Analysis2024

    • Author(s)
      Fujie Yuki、Iwasaki Koji、Hamasaki Masanari、Suzuki Yuki、Matsuoka Masatake、Onodera Tomohiro、Kondo Eiji、Iwasaki Norimasa
    • Journal Title

      The American Journal of Sports Medicine

      Volume: 52 Issue: 9 Pages: 2278-2286

    • DOI

      10.1177/03635465241256100

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Higher Association of Pelvis-Knee-Ankle Angle Compared With Hip-Knee-Ankle Angle With Knee Adduction Moment and Patient-Reported Outcomes After High Tibial Osteotomy2023

    • Author(s)
      Iwasaki Koji、Ohkoshi Yasumitsu、Hosokawa Yoshiaki、Chida Shuya、Ukishiro Kengo、Kawakami Kensaku、Suzuki Sho’ji、Maeda Tatsunori、Onodera Tomohiro、Kondo Eiji、Iwasaki Norimasa
    • Journal Title

      The American Journal of Sports Medicine

      Volume: 51 Issue: 4 Pages: 977-984

    • DOI

      10.1177/03635465221150513

    • Related Report
      2022 Research-status Report
  • [Journal Article] Discrepancy in the distribution patterns of subchondral bone density across the ankle joint after medial opening-wedge and lateral closing-wedge high tibial osteotomy.2022

    • Author(s)
      Matsubara, Onodera T, Iwasaki K, Hishimura R, Matsuoka M, Kondo E, Iwasaki N.
    • Journal Title

      Am J Sports Med

      Volume: 50 Issue: 2 Pages: 478-485

    • DOI

      10.1177/03635465211062235

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Factors Affecting The Change In Knee Adduction Moment Of Contralateral Knee Joint After High Tibial Osteotomy2024

    • Author(s)
      Koji Iwasaki, Yasumitsu Ohkoshi, Sasaya Kazuki, Shigeyuki Sakurai, Kengo Ukishiro, Kensaku Kawakami, Shoji Suzuki, Tatsunori Maeda, Tomohiro Onodera, Eiji Kondo, Norimasa Iwasaki
    • Organizer
      21st ESSKA Congress, Milan, Italy
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Factors affecting the change in knee adduction moment of contralateral knee joint after high tibial osteotomy2024

    • Author(s)
      Koji Iwasaki, Yasumitsu Ohkoshi, Sasaya Kazuki, Shigeyuki Sakurai, Kengo Ukishiro, Kensaku Kawakami, Shoji Suzuki, Tatsunori Maeda, Tomohiro Onodera, Eiji Kondo, Norimasa Iwasaki
    • Organizer
      ORS 2024 Annual Meeting
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The biomechanical characteristics features of varus thrust in patients with medial knee osteoarthritis - Quantified by three-dimensional gait analysis2024

    • Author(s)
      Koji Iwasaki, Yasumitsu Ohkoshi, Yui Tateyama, Kengo Ukishiro, Kensaku Kawakami, Shoji Suzuki, Tatsunori Maeda, Tomohiro Onodera, Eiji Kondo, Norimasa Iwasaki
    • Organizer
      ORS 2024 Annual Meeting
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Factors affecting the change in knee adduction moment of contralateral knee joint after high tibial osteotomy2024

    • Author(s)
      Koji Iwasaki, Yasumitsu Ohkoshi, Kazuki Sasaya, Kengo Ukishiro, Kensaku Kawakami, Shoji Suzuki, Tatsunori Maeda, Tomohiro Onodera, Eiji Kondo, Norimasa Iwasaki
    • Organizer
      Annual Meeting of the Orthopaedic Research Society
    • Related Report
      2023 Research-status Report
  • [Presentation] The biomechanical characteristics features of varus thrust in patients with medial knee osteoarthritis -Quantified by three dimensional gait analysis-2024

    • Author(s)
      Koji Iwasaki, Yasumitsu Ohkoshi, Yui Tateyama, Kengo Ukishiro, Kensaku Kawakami, Shoji Suzuki, Tatsunori Maeda, Tomohiro Onodera, Eiji Kondo, Norimasa Iwasaki
    • Organizer
      Annual Meeting of the Orthopaedic Research Society
    • Related Report
      2023 Research-status Report
  • [Presentation] Higher Correlation Of A New Radiographic Parameter With Knee Adduction Moment And Patient-reported Outcomes After High Tibial Osteotomy: Pelvis-knee-ankle Angle2022

    • Author(s)
      Koji Iwasaki; Yasumitsu Ohkoshi; Yoshiaki Hosokawa; Shuya Chida; Kengo Ukishiro; Kensaku Kawakami; Shoji Suzuki; Tatsunori Maeda; Tomohiro Onodera, Eiji Kondo; Norimasa Iwasaki
    • Organizer
      Annual Meeting of the Orthopaedic Research Society
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2026-01-16  

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