TY - JOUR
T1 - Material and structural tensile properties of the human medial patello-femoral ligament
AU - Criscenti, G.
AU - De Maria, C.
AU - Sebastiani, E.
AU - Tei, M.
AU - Tei, Matteo Maria
AU - Placella, G.
AU - Placella, Giacomo
AU - Speziali, A.
AU - Speziali, Andrea
AU - Vozzi, G.
AU - Cerulli, G.
AU - Cerulli, Giuliano Giorgio
PY - 2015
Y1 - 2015
N2 - The medial patellofemoral ligament (MPFL) is considered the most important passive patellar stabilizer and acts 50-60% of the force of the medial soft-tissue which restrains the lateralization of the patella between 0° and 30°. In this work, 24 human knees have been tested to evaluate the material properties of MPFL and to determine the structural behavior of femur-MPFL-Patella complex (FMPC). Particular attention was given to maintain the anatomical orientation between the patella and MPFL and to the evaluation of the elongation during the mechanical tests. The ultimate stress of the isolated ligament was 16±11MPa, the ultimate strain was 24.3±6.8%, the Young׳s Modulus was 116±95MPa and the strain energy density was 2.97±1.69MPa. The ultimate load of the whole structure, FMPC, was 145±68N, the ultimate elongation was 9.5±2.9mm, the linear stiffness was 42.5±10.2N/mm and the absorbed energy was 818.8±440.7Nmm. The evaluation of material and structural properties of MPFL is fundamental to understand its contribution as stabilizer and for the selection of repair and reconstruction methods.
AB - The medial patellofemoral ligament (MPFL) is considered the most important passive patellar stabilizer and acts 50-60% of the force of the medial soft-tissue which restrains the lateralization of the patella between 0° and 30°. In this work, 24 human knees have been tested to evaluate the material properties of MPFL and to determine the structural behavior of femur-MPFL-Patella complex (FMPC). Particular attention was given to maintain the anatomical orientation between the patella and MPFL and to the evaluation of the elongation during the mechanical tests. The ultimate stress of the isolated ligament was 16±11MPa, the ultimate strain was 24.3±6.8%, the Young׳s Modulus was 116±95MPa and the strain energy density was 2.97±1.69MPa. The ultimate load of the whole structure, FMPC, was 145±68N, the ultimate elongation was 9.5±2.9mm, the linear stiffness was 42.5±10.2N/mm and the absorbed energy was 818.8±440.7Nmm. The evaluation of material and structural properties of MPFL is fundamental to understand its contribution as stabilizer and for the selection of repair and reconstruction methods.
KW - Femur-MPFL-patella complex (FMPC)
KW - Ligament biomechanics
KW - Material properties
KW - Medial patello-femoral ligament (MPFL)
KW - Structural properties
KW - Femur-MPFL-patella complex (FMPC)
KW - Ligament biomechanics
KW - Material properties
KW - Medial patello-femoral ligament (MPFL)
KW - Structural properties
UR - http://hdl.handle.net/10807/68996
UR - http://www.sciencedirect.com/science/article/pii/s1751616115003677
U2 - 10.1016/j.jmbbm.2015.09.030
DO - 10.1016/j.jmbbm.2015.09.030
M3 - Article
SN - 1751-6161
VL - 2015
SP - 141
EP - 148
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
ER -