Measurement/analysis of deformation and strain distribution of the anterior cruciate ligament in the human knee

Shunji Hirokawa, Reiji Tsuruno

    Research output: Contribution to journalArticlepeer-review


    Highly variable deformations of the anterior cruciate ligaments (ACL) cannot be adequately quantified by one-dimensional and/or localized measurements. Furthermore it is impossible to directly measure in-situ, non-uniform distribution of biaxial strain over the entire surface of the intra-articular ligaments. We employed an alternative approach; Instead of using an actual knee and ACL, a knee motion simulator and a pseudo ligament were prepared. The pseudo ligament was manipulated so as to simulate the deformation and stress the actual ACL undergoes during knee flexion. Two hundred and ten points drawn on the pseudo ligament at regular intervals, were measured by the stereo-photogrammetric method, and components of the Green strain tensor were computed. Next, using the finite element method, in which the ligament was treated as an incompressive hyperelastic membrane, the finite deformation of the ligament was theoretically analyzed. The results demonstrated that strain distribution varied, even along the fiber run, and large strain gradients were observed in the regions near the insertions. Futher, the following values were obtained as a function of knee flexion: three-dimensional change in shape, resultant pull force on the tibial insertion, and change of strain pattern by anterior-posterior displacement of the tibia.

    Original languageEnglish
    Pages (from-to)51-68
    Number of pages18
    JournalMemoirs of the Kyushu University, Faculty of Engineering
    Issue number2
    Publication statusPublished - Jun 1996

    All Science Journal Classification (ASJC) codes

    • Energy(all)
    • Atmospheric Science
    • Earth and Planetary Sciences(all)
    • Management of Technology and Innovation


    Dive into the research topics of 'Measurement/analysis of deformation and strain distribution of the anterior cruciate ligament in the human knee'. Together they form a unique fingerprint.

    Cite this