This study examined the conditions under which interstitial fluid load support remains sustained during physiological motions, as well as the role of the labrum in maintaining fluid load support and the effect of its presence on the solid phase of the surrounding cartilage. Additionally, various sensitivity studies were conducted to assess the effect of fibril orientation through the thickness, permeability coefficient, and strain-dependent permeability coefficient.
Owner: mherron
Jocelyn N. Todd, Travis G. Maak, Gerard A. Ateshian, Steve A. Maas, & Jeffrey A. Weiss (2018). Hip chondrolabral mechanics during activities of daily living: Role of the labrum and interstitial fluid pressurization. Journal of Biomechanics, 69(), 113-120. DOI: 10.1016/j.jbiomech.2018.01.001
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Baseline/Baseline SLS.feb
The baseline material model and parameters, with 600 seconds of single-leg stance.
Baseline/Baseline Squat.feb
The baseline material model and parameters, with 10 cycles of squatting.
Baseline/Baseline Gait.feb
The baseline material model and parameters, with 10 cycles of gait.
LabrumRemoved/LabrumRemoved Squat.feb
The labrum is removed from the baseline model, with 10 cycles of squat.
LabrumRemoved/LabrumRemoved SLS.feb
The labrum is removed from the baseline model, with 600 seconds of single-leg stance.
Solid/Solid SLS.feb
A solid-elastic model version of the baseline model, with 600 seconds of single-leg stance.
Solid/Solid Squat.feb
A solid-elastic model version of the baseline model, with 10 cycles of squat.
Solid/Solid Gait.feb
A solid-elastic model version of the baseline model, with 10 cycles of gait.
Strain-dependent coefficient for permeability, M0 and M, is tested. In the paper, M = 0.5, 5, 10, 15, 20, and 25. Model runs 600 seconds of single-leg stance.
Constant permeability, k or “perm”, is tested. In the paper, k was tested at 0.00075, 0.001, 0.0025, 0.005, 0.0075 mm4/Ns. Model runs 10 cycles of gait.
Constant permeability, k or “perm”, is tested. In the paper, k was tested at 0.00075, 0.001, 0.0025, 0.005, 0.0075 mm4/Ns. Model runs 600 seconds of single-leg stance.
Fibrils are oriented tangential to the surface in the superficial zone and homogeneously in the rest of the cartilage. See Figure 2 in the attached paper. Model runs 10 cycles of gait.
Fibrils are oriented homogeneously throughout the cartilage. See Figure 2 in the attached paper. Model runs 10 cycles of gait.
Supplemental Comparisons/Fibrils/Fibrils Deep Gait.feb
Fibrils are oriented perpendicular to the surface in the deep zone and homogeneously in the rest of the cartilage. See Figure 2 in the attached paper. Model runs 10 cycles of gait.
Supplemental Comparisons/Fibrils/Fibrils Deep SLS.feb
Fibrils are oriented perpendicular to the surface in the deep zone and homogeneously in the rest of the cartilage. See Figure 2 in the attached paper. Model runs 600 seconds of single-leg stance.
Fibrils are oriented tangentially in the superficial zone and homogeneously in the rest of the cartilage. See Figure 2 in the attached paper. Model runs 600 seconds of single-leg stance.
FEBio Studio Model Repository