CVClient

Higa Masaru

  (比嘉 昌)

Profile Information

Affiliation
Assistant Professor, Graduate School, of Engineering, University of Hyogo
Degree
博士(工学)(北海道大学)

J-GLOBAL ID
200901006718332920
researchmap Member ID
1000362329

External link

Research History

 3

Papers

 65
  • 平井祐介, 比嘉昌
    臨床バイオメカニクス, 2024  Peer-reviewedLast authorCorresponding author
  • Masaru Higa, Hiromasa Tanino, Hiroshi Ito, Scott A. Banks
    Journal of Experimental Orthopaedics, 10(130), Dec, 2023  Peer-reviewedLead authorCorresponding author
  • Masaru Higa, Hiroshi Nakayama, Ryo Kanto, Shintaro Onishi, Shinichi Yoshiya, Toshiya Tachibana, Tomoya Iseki
    Journal of Orthopaedics, 43 1-5, Sep, 2023  Peer-reviewedLead authorCorresponding author
  • Masaru HIGA, Yudai ENDO, Yudai NAKAGAWA
    Journal of Biomechanical Science and Engineering, 17(3) 22-00060, 2022  Peer-reviewedLead authorCorresponding author
  • Hiroshi Nakayama, Ryo Kanto, Tomoya Iseki, Shintaro Onishi, Shunichiro Kambara, Shinichi Yoshiya, Steffen Schröter, Toshiya Tachibana, Masaru Higa
    The Knee, 29 167-173, Feb 23, 2021  Peer-reviewedLast authorCorresponding author
    BACKGROUND: Correction of coronal plane deformity by osteotomies around the knee is theoretically three-dimensional (3D) and can be associated with changes in other planes. It has been shown that 3D rotational changes are induced by biplanar high tibial osteotomy; however, relevant information in biplanar lateral closed-wedge distal femoral osteotomy (LCW-DFO) has not been reported in literatures. This study aimed to investigate rotational changes in axial and sagittal planes in LCW-DFO using computer-aided design (CAD) simulations. METHODS: LCW-DFO is composed of three cuts: one ascending cut and two transverse cuts. In the simulations, the following geometrical parameters were adopted as factors potentially influencing 3D changes occurring in the osteotomy. The ascending cut angle measured as the angle between the edge of the ascending cut and the edge of the transverse cut in the lateral view, and the ascending cut obliquity measured as the angle corresponding to anterior/posterior inclination of the ascending cut with reference to the posterior condylar tangent line in the axial view. In the analysis, the effects of these bony cut angles on associated rotational changes in the axial and sagittal planes (internal/external rotation and flexion/extension) were calculated. Variation of wedge size ranged from 2 to 8 mm. RESULTS: The degree of the ascending cut obliquity substantially correlated with associated change in the sagittal plane (extension/flexion) while inducing only minimal change in rotation in the axial plane (internal/external rotation). When the osteotomy was made without ascending cut obliquity, the change in knee extension/flexion was minimal for the conditions analyzed while coupled internal rotation of the distal bony segment was induced. CONCLUSIONS: In biplanar LCW-DFO, the ascending cut angle substantially influenced the amount of internal rotation of the distal bony segment with little effect on flexion/extension angles. By contrast, ascending cut obliquity in the axial plane yields an effect on flexion/extension angles and little effect on internal rotation of the distal bony segment.

Misc.

 37
  • Masaru Higa, Ryutaro Hayami, Masahiro Ono, Shizuki Nakamura, Shiori Matsuda
    APCMBE 2020, IFMBE Proceedings, 82 1-6, May, 2020  Peer-reviewedLead author
  • Masaru Higa, Nozomu Araki, Shintaro Nakatani, Hideki Toji
    Proceedings of the Seventh International Symposium on Aero Aqua Bio-mechanisms, 89-93, Aug, 2018  
  • ABO Masayoshi, HIGA Masaru, KAKUNAI Satoshi
    Mechanical Engineering Congress, Japan, 2015 "J2210201-1"-"J2210201-3", Sep 13, 2015  
    Titanium tends to seizure with other metals, so titanium unfits thread rolling for dental implant with φ3mm diameter or less. Therefore we lubricate the contact point and prevent the seizure by applying a textured surface on the die. We were examined for the textured surface for reducing the shear stress by plastically deformed analysis between titanium material and die, and fluid analysis of the oil around the textured surface. From this analysis, texture provides an effective of low-friction, and a dimple type texture reduces shear stress by 28%.
  • M. Higa, F. Kawabata, Y. Kobayashi, K. Fukuda
    WORLD CONGRESS ON MEDICAL PHYSICS AND BIOMEDICAL ENGINEERING, 2015, VOLS 1 AND 2, 51 346-349, 2015  
    This study is aimed to show if hip joint loads during walking could be reduced by a slight gait modification. Six healthy adult subjects (mean (SD) age 22 (0.0) years, mean (SD) height 1.68 (0.04) m, mean (SD) weight 60.2 (7.9) kg) took part in this study. A series of normal walking trials at a self-selected speed (step length and cadence) and stride width were performed. After subjects had gait retraining during in which they were asked to alter their stride width by increasing abduction angles without changing any other kinematics. Subjects walked 10 trials for each gait pattern. A total of 20 trials were performed. Experimental gait data (joint angles and ground reaction forces) and musculoskeletal computer models were used to quantify individual hip joint moments. We used adduction moments as an indicator of internal hip joint loads. An inverse dynamics approach was also used to calculate the hip moments during a stance phase. Changes in abduction angles did not have any effect on the shape of the hip adduction moment curve but changed its peak mean magnitudes. In conclusion, we showed that a modified gait pattern can reduce the hip adduction moment. Given the results of this study, we believe that gait retraining may be an acceptable, noninvasive option for the treatment of patients of OA.
  • KAWABATA Fusako, HIGA Masaru, KOBAYASHI Yoshihiro, KAKUNAI Satoshi, ABO Masayoshi
    Proceedings of the ... JSME Conference on Frontiers in Bioengineering, 2014(25) 143-144, Oct 2, 2014  

Books and Other Publications

 1

Presentations

 72

Research Projects

 10

Academic Activities

 2

Media Coverage

 1