Determination of the in situ mechanical behavior of ankle ligaments

Nie, Bingbing; Panzer, Matthew B.; Mane, Adwait; Mait, Alexander R.; Donlon, John-Paul; Forman, Jason; Kent, Richard W.

doi:10.1016/j.jmbbm.2016.09.010

Cited by 18 publications

(22 citation statements)

References 43 publications

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“…The sensitivity of the bone kinematics to the DVs was investigated by conducting a 1000-case design of experiment study. The in situ fiber toe regions exhibited a statistically significant effect on the bone kinematics, and the stiffness values were found to be relatively insignificant (Nie et al 2016). In situ toe regions are often neglected in computational ankle models (Wei et al 2011).…”

Section: Discussionmentioning

confidence: 99%

“…The kinematics of the ankle bones were measured as intrinsic yaw, pitch and roll angles of the local coordinate systems at 30° of calcaneus rotation relative to the orientation of the bone local coordinate system at the start of the simulation (described in Section 2.1 and Section 2.3.1). Algorithm of the sensitivity study Nie et al (2015) described the algorithm used for the sensitivity study. The Latin Hypercube (LH) was chosen as the sampling scheme for the sensitivity study.…”

Section: Simulation Setupmentioning

confidence: 99%

“…Interestingly, the DVs representing ligament stiffness, ni, were found to be relatively insignificant on the bone angles, e.g. no ni was among the five most significant DVs in the sensitivity analysis of the fibula angles (Nie et al, 2016 Figure 26. Sensitivity analysis on the yaw-pitch-roll angle during of the fibula, the talus, and the navicular during the in-plane rotation around the Z-axis of the tibia.…”

Section: Implications Of the Sensitivity Analysismentioning

confidence: 99%

“…These were the DVs for the sensitivity study. The methods and results sections of the sensitivity (Section 3.2) and optimization (Section 3.3) have been reported in the literature (Nie et al, 2015(Nie et al, , 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Optimized in situ toe regions of fibers of ankle ligaments. The relative length of the toe region was determined as its ratio relative to the initial ligament length (Nie et al 2016 Division of work between authors: Nie, Panzer and Mane developed the outline of this study. Panzer created the cartilage mesh with the help of Mane.…”

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confidence: 99%

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Representing Sub-failure Quasi-static Ligament Mechanics and Bone Kinematics in a Human Ankle Finite Element Model

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Section: Discussionmentioning

confidence: 99%

Section: Simulation Setupmentioning

confidence: 99%

Section: Implications Of the Sensitivity Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

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Representing Sub-failure Quasi-static Ligament Mechanics and Bone Kinematics in a Human Ankle Finite Element Model

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Problems of Strength at Loading Multilayer Bones of the Human

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Searching for the “sweet spot”: the foot rotation and parallel engagement of ankle ligaments in maximizing injury tolerance

Nie

Forman

Mait

et al. 2017

Biomech Model Mechanobiol

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Ligament sprains, defined as tearing of bands of fibrous tissues within ligaments, account for a majority of injuries to the foot and ankle complex in field-based sports. External rotation of the foot is considered the primary injury mechanism of syndesmotic ankle sprains with concomitant flexion and inversion/eversion associated with particular patterns of ligament trauma. However, the influence of the magnitude and direction of loading vectors to the ankle on the in situ stress state of the ligaments has not been quantified in the literature. The objective of the present study was to search for the maximum injury tolerance of a human foot with an acceptable subfailure distribution of individual ligaments. We used a previously developed and comprehensively validated foot and ankle model to reproduce a range of combined foot rotation experienced during high-risk sports activities. Biomechanical computational investigation was performed on initial foot rotation from [Formula: see text] of plantar flexion to [Formula: see text] of dorsiflexion, and from [Formula: see text] of inversion to [Formula: see text] of eversion prior to external rotation. Change in initial foot rotation shifted injury initiation among different ligaments and resulted in a wide range of injury tolerances at the structural level (e.g., 36-125 Nm of rotational moment). The observed trend was in agreement with a parallel experimental study that initial plantar flexion decreased the incidence of syndesmotic injury compared to a neutral foot. A mechanism of distributing even loads across ligaments subjected to combined foot rotations was identified. This mechanism is potential to obtain the maximum load-bearing capability of a foot and ankle while minimizing the injury severity of ligaments. Such improved understanding of ligament injuries in athletes is necessary to facilitate injury management by clinicians and countermeasure development by biomechanists.

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Determination of the in situ mechanical behavior of ankle ligaments

Cited by 18 publications

References 43 publications

Representing Sub-failure Quasi-static Ligament Mechanics and Bone Kinematics in a Human Ankle Finite Element Model

Representing Sub-failure Quasi-static Ligament Mechanics and Bone Kinematics in a Human Ankle Finite Element Model

Problems of Strength at Loading Multilayer Bones of the Human

Searching for the “sweet spot”: the foot rotation and parallel engagement of ankle ligaments in maximizing injury tolerance

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