Hyper-elastic model analysis of anterior cruciate ligament

Hirokawa, Shunji; Tsuruno, Reiji

doi:10.1016/s1350-4533(96)00077-x

Cited by 21 publications

(13 citation statements)

References 21 publications

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“…Several finite element (FE) models have been used to predict the mechanical behavior of the ACL and insertions. [32][33][34][35][36] However, due to spatial resolution and other experimental limitations of traditional mechanical testing techniques, primarily the inability to distinguish the response of subsurface microscale ACL insertion transitional tissues from the entire ligament complex, no experimental validation of FE models has been possible.…”

Section: Introductionmentioning

confidence: 99%

Elastographic imaging of strain distribution in the anterior cruciate ligament and at the ligament–bone insertions

Spalazzi

Gallina

Fung-Kee-Fung

et al. 2006

Journal Orthopaedic Research

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ABSTRACT:The anterior cruciate ligament (ACL) functions as a mechanical stabilizer in the tibiofemoral joint, and is the most commonly injured knee ligament. To improve the clinical outcome of tendon grafts used for ACL reconstructions, our long-term goal is to promote graft-bone integration via the regeneration of the native ligament-bone interface. An understanding of strain distribution at this interface is crucial for functional scaffold design and clinical evaluation. Experimental determination, however, has been difficult due to the small length scale of the insertion sites. This study utilizes ultrasound elastography to characterize the response of the ACL and ACL-bone interface under tension. Specifically, bovine tibiofemoral joints were mounted on a material testing system and loaded in tension while radiofrequency (RF) data were acquired at 5 MHz. Axial strain elastograms between RF frames and a reference frame were generated using crosscorrelation and recorrelation techniques. Elastographic analyses revealed that when the joint was loaded in tension, complex strains with both compressive and tensile components occurred at the tibial insertion, with higher strains found at the insertion sites. In addition, the displacement was greatest at the ACL proper and decreased in value gradually from ligament to bone, likely a reflection of the matrix organization at the ligament-bone interface. Our results indicate that elastography is a novel method that can be readily used to characterize the mechanical properties of the ACL and its insertions into bone. ß

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Section: Introductionmentioning

confidence: 99%

Elastographic imaging of strain distribution in the anterior cruciate ligament and at the ligament–bone insertions

Spalazzi

Gallina

Fung-Kee-Fung

et al. 2006

Journal Orthopaedic Research

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“…It was assumed, therefore, that the fascicular element would have stiffness properties (the relative ease in stretching the material for a given applied force) comparable to ligamentous tissue. 22 The epineurium, in general, has comparatively less col- lagen than the peri-and endoneurium; 51 this region was assumed to have a stiffness of an order of magnitude less than the fascicular region. For computational simplicity, the strength properties (the greatest force that the material can withstand without undergoing failure) were not modeled.…”

Section: Nerve Materials Propertiesmentioning

confidence: 99%

Intraneural ganglia: a clinical problem deserving a mechanistic explanation and model

Elangovan

Odegard

Morrow

et al. 2009

FOC

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Intraneural ganglion cysts have been considered a curiosity for 2 centuries. Based on a unifying articular (synovial) theory, recent evidence has provided a logical explanation for their formation and propagation. The fundamental principle is that of a joint origin and a capsular defect through which synovial fluid escapes following the articular branch, typically into the parent nerve. A stereotypical, reproducible appearance has been characterized that suggests a shared pathogenesis. In the present report the authors will provide a mechanistic explanation that can then be mathematically tested using a preliminary model created by finite element analysis.

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“…Three-dimensional models of ligaments require the use of anisotropic constitutive or cross-sectionally isotropic relationships. 6,7 Uniaxial elements are particularly appropriate to simulate these components, due to its mechanical properties aligned with its cross-sectional geometry strongly below its length. In this case, only a one-dimensional constitutive relationship is required.…”

Section: Numeric Modelmentioning

confidence: 99%

Simulação numérica tridimensional da mecânica do joelho humano

et al. 2009

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Objective: The knee joint is the part of our structure upon which most mechanical demands are placed and a large number of lesions are associated to it. These factors motivated the construction of a three-dimensional model of the human knee joint in order to simulate joint kinematics and obtain the mechanical demands on the main ligaments during knee flexion movements. Methods: The finite elements method was used to build a three-dimensional, biomechanical model of the knee joint. In this model with six degrees of freedom, the flexion/extension movement is applied, while the other five degrees of freedom are governed by the interactions between joint components. Results: Data was collected on the movements,

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Hyper-elastic model analysis of anterior cruciate ligament

Cited by 21 publications

References 21 publications

Elastographic imaging of strain distribution in the anterior cruciate ligament and at the ligament–bone insertions

Elastographic imaging of strain distribution in the anterior cruciate ligament and at the ligament–bone insertions

Intraneural ganglia: a clinical problem deserving a mechanistic explanation and model

Simulação numérica tridimensional da mecânica do joelho humano

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