TY - JOUR
T1 - Parametric finite element model of medial patellofemoral ligament reconstruction model development and clinical validation
AU - Sanchis-Alfonso, Vicente
AU - Alastruey-López, Diego
AU - Ginovart, Gerad
AU - Montesinos-Berry, Erik
AU - García-Castro, Fabio
AU - Ramírez-Fuentes, Cristina
AU - Monllau, Joan Carles
AU - Alberich-Bayarri, Angel
AU - Pérez, María Angeles
PY - 2019/7/5
Y1 - 2019/7/5
N2 - © 2019, The Author(s). Background: Currently, there is uncertainty regarding the long-term outcome of medial patellofemoral ligament reconstructions (MPFLr). Our objectives were: (1) to develop a parametric model of the patellofemoral joint (PFJ) enabling us to simulate different surgical techniques for MPFLr; (2) to determine the negative effects on the PFJ associated with each technique, which could be related to long-term deterioration of the PFJ. Methods: A finite element model of the PFJ was created based on CT data from 24 knees with chronic lateral patellar instability. Patella contact pressure and maximum MPFL-graft stress at five angles of knee flexion (0, 30, 60, 90 and 120°) were analysed in three types of MPFLr: anatomic, non-anatomic with physiometric behaviour, and non-anatomic with non-physiometric behaviour. Results: An increase in patella contact pressure was observed at 0 and 30° of knee flexion after both anatomic and non-anatomic MPFLr with physiometric behaviour. In both reconstructions, the ligament was tense between 0 and 30° of knee flexion, but at 60, 90 and 120°, it had no tension. In the third reconstruction, the behaviour was completely the opposite. Conclusion: A parametric model of the PFJ enables us to evaluate different types of MPFLr throughout the full range of motion of the knee, regarding the effect on the patellofemoral contact pressure, as well as the kinematic behaviour of the MPFL-graft and the maximum MPFL-graft stress.
AB - © 2019, The Author(s). Background: Currently, there is uncertainty regarding the long-term outcome of medial patellofemoral ligament reconstructions (MPFLr). Our objectives were: (1) to develop a parametric model of the patellofemoral joint (PFJ) enabling us to simulate different surgical techniques for MPFLr; (2) to determine the negative effects on the PFJ associated with each technique, which could be related to long-term deterioration of the PFJ. Methods: A finite element model of the PFJ was created based on CT data from 24 knees with chronic lateral patellar instability. Patella contact pressure and maximum MPFL-graft stress at five angles of knee flexion (0, 30, 60, 90 and 120°) were analysed in three types of MPFLr: anatomic, non-anatomic with physiometric behaviour, and non-anatomic with non-physiometric behaviour. Results: An increase in patella contact pressure was observed at 0 and 30° of knee flexion after both anatomic and non-anatomic MPFLr with physiometric behaviour. In both reconstructions, the ligament was tense between 0 and 30° of knee flexion, but at 60, 90 and 120°, it had no tension. In the third reconstruction, the behaviour was completely the opposite. Conclusion: A parametric model of the PFJ enables us to evaluate different types of MPFLr throughout the full range of motion of the knee, regarding the effect on the patellofemoral contact pressure, as well as the kinematic behaviour of the MPFL-graft and the maximum MPFL-graft stress.
KW - Finite element methodology
KW - MPFL reconstruction
KW - MPFL-stress
KW - Medial patellofemoral ligament
KW - Patellofemoral contact pressure
KW - Patellofemoral joint
UR - http://www.mendeley.com/research/parametric-finite-element-model-medial-patellofemoral-ligament-reconstruction-model-development-clin
U2 - 10.1186/s40634-019-0200-x
DO - 10.1186/s40634-019-0200-x
M3 - Article
C2 - 31278510
SN - 2197-1153
VL - 6
JO - Journal of Experimental Orthopaedics
JF - Journal of Experimental Orthopaedics
M1 - 32
ER -