Abstract:
:In a previous study we were able to accurately fit experimental data on arterial tissues at supra-physiological loads using a material model that accounts for softening/damage only in the portion of the model associated with the collagen fibers (Weisbecker et al., 2012). Naturally, this result leads to the hypothesis that the softening behavior is related only to the collagen fibers, and not to the matrix material. In this study we test this hypothesis by conducting uniaxial extension tests on elastase and collagenase treated tissues and on untreated control specimens from the media of human thoracic aortas. We relate structural changes in the tissue after enzyme treatment to changes in the corresponding mechanical behavior. Collagenase treated tissue does not exhibit any softening behavior under quasi-static cyclic loading, a result supporting our hypothesis. Conversely, elastase treated tissue exhibits continuous softening under the same loading conditions, indicating that the integrity of the tissue is destroyed upon removal of the elastin. Finally, we fit isotropic and anisotropic constitutive models to the mechanical response of the collagenase treated arterial tissue, while our anisotropic model better approximates the response of collagenase treated arterial tissues, we show that an isotropic matrix model is sufficient to accurately reproduce the mechanical response of untreated control specimens, consistent with current practice in the literature.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Weisbecker H,Viertler C,Pierce DM,Holzapfel GAdoi
10.1016/j.jbiomech.2013.04.025subject
Has Abstractpub_date
2013-07-26 00:00:00pages
1859-65issue
11eissn
0021-9290issn
1873-2380pii
S0021-9290(13)00219-4journal_volume
46pub_type
杂志文章abstract::The question of whether the mechanical stiffness of a coronary bypass or that of a diseased coronary artery can have a significant effect on the hemodynamics in these vessels is addressed analytically, with emphasis on the effects of wave reflections. The analysis is based on a model of the vessels involved, and the r...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/s0021-9290(01)00113-0
更新日期:2001-11-01 00:00:00
abstract::Cervical spine injuries continue to be a costly societal problem. Future advancements in injury prevention depend on improved physical and computational models, which are predicated on a better understanding of the neck response during dynamic loading. Previous studies have shown that the tolerance of the neck is depe...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2016.01.006
更新日期:2016-02-29 00:00:00
abstract::The skeleton consists of a series of elements with a variety of functions. In locations where shape or protection are of prime importance the bone's architecture is achieved during growth under direct genetic control. In locations where resistance to repetitive loading is important only the general form of the bone wi...
journal_title:Journal of biomechanics
pub_type: 杂志文章,评审
doi:10.1016/0021-9290(87)90026-1
更新日期:1987-01-01 00:00:00
abstract::Confinement of the heel due to the counter of the shoe is believed to influence heel pad biomechanics. Using a two-dimensional finite element model of the heel pad and shoe during a simulation of static standing, the aim of this study was to quantify the potential effect of confinement on internal heel pad stress. Non...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2007.01.004
更新日期:2007-01-01 00:00:00
abstract::An experimental setup was developed for statically measuring seven vertical and three horizontal reaction forces on the foot. In the setup, the leg can be simultaneously loaded (1) by a vertical force, (2) by an externally applied axial moment, and (3) by simulated muscle forces. The foot is free to invert under influ...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/0021-9290(89)90080-8
更新日期:1989-01-01 00:00:00
abstract::In this article, the tensile properties of gastric wall were investigated by using biomechanical test and theoretical analysis. The samples of porcine stomach strips from smaller and greater curvature of the stomach were cut in longitudinal and circumferential direction, respectively. The loading-unloading, stress rel...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2014.12.048
更新日期:2015-02-26 00:00:00
abstract::Orthopaedic management of femoral head osteonecrosis is a common clinical problem for which there presently is no good solution. Current animal models are inappropriate to study potential new solutions, since it has been difficult to replicate the natural history of structural collapse seen in the human disorder. Rece...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/s0021-9290(03)00154-4
更新日期:2003-09-01 00:00:00
abstract::In order to perform effective static stretching of the hip adductor muscles, it is necessary to clarify the position where the muscles are most stretched. However, the effective flexion angle in stretching for each adductor muscle remains unclear. The goal of this study was to investigate the effect of hip flexion ang...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2020.109649
更新日期:2020-03-05 00:00:00
abstract::Formation of restrictive adhesions is one of the main obstacles in rehabilitation following hand surgery. Most experimental work, however, involves only a macroscopic and/or histologic evaluation of the amount of adhesions, and their functional characteristics are poorly described. The aim of this study was to develop...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/0021-9290(91)90171-i
更新日期:1991-01-01 00:00:00
abstract::Several compensation methods estimate bone pose from a cluster of skin-mounted makers, each influenced by soft tissue artifact (STA). In this study, linear 3D interpolation and approximation methods (affine mapping, Kriging and radial basis function (RBF)) and the conventional singular value decomposition (SVD) method...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2009.06.006
更新日期:2009-09-18 00:00:00
abstract::In this study, we tested the compressive stress relaxation behaviors of the mandibular condylar and temporal cartilages in the porcine temporomandibular joint (TMJ). The aim was to determine the quantitative and qualitative similarities and differences of compressive stress relaxation behaviors between the two cartila...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2014.03.007
更新日期:2014-05-07 00:00:00
abstract::This study examined the effect of friction between the hand and grip surface on a person's grip strategy and force generation capacity. Twelve young healthy adults performed power grip exertions on an instrumented vertical cylinder with the maximum and 50% of maximum efforts (far above the grip force required to hold ...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2011.03.020
更新日期:2011-05-17 00:00:00
abstract::Rapid force generation across submaximal levels has been evaluated with the rate of force development scaling factor (RFD-SF) in different isometric tasks, while such measurement was still not verified in dynamic tasks. Our study was designed to evaluate the feasibility of the RFD-SF in dynamic drop jump (DJ) task (RF...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2020.109980
更新日期:2020-09-18 00:00:00
abstract::The relative motion of the brain with respect to the skull has been widely studied to investigate brain injury mechanisms under impacts, but the motion patterns are not yet thoroughly understood. This work analyzes brain motion patterns using the most recent and advanced experimental relative brain/skull motion data c...
journal_title:Journal of biomechanics
pub_type: 杂志文章,评审
doi:10.1016/j.jbiomech.2006.06.018
更新日期:2007-01-01 00:00:00
abstract::The purpose of the current paper was to use the energy approach to develop a simplified equation for quantifying individual muscle contributions to mechanical stability about all three axes of a particular joint. Specific examples are provided for muscles acting about the lumbar spine's L4/L5 joint. The stability equa...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2004.06.004
更新日期:2005-05-01 00:00:00
abstract::Accurate body segment parameter (BSP) information is required for dynamic analyses of motion and the current methods available for obtaining these BSPs have been criticized. The purpose of this study was to determine whether dual energy X-ray absorptiometry (DXA) could accurately measure the BSPs of scanned objects an...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/s0021-9290(02)00227-0
更新日期:2002-12-01 00:00:00
abstract::The maximum tetanic tension of skeletal muscle (P(0)) is often estimated based on calculation of physiological cross-sectional area (PCSA). PCSA depends on muscle volume, pennation angle, and fiber length. Studies documenting PCSA in fixed human muscles usually compute muscle volume by dividing muscle mass by density....
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2004.10.001
更新日期:2005-11-01 00:00:00
abstract::The surface roughness of a bone implant was defined parametrically. The values of the parameters defining the surface were varied. Some traditionally used surface roughness parameters were calculated. By means of a theoretical model the bone-implant interfacial shear strength was estimated. No simple correlation betwe...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/s0021-9290(00)00045-2
更新日期:2000-10-01 00:00:00
abstract::Polarization sensitive optical coherence tomography (PSOCT) is an interferometric technique sensitive to birefringence. Since mechanical loading alters the orientation of birefringent collagen fibrils, we asked if PSOCT can be used to measure local mechanical properties of sclera. Infrared (1300 nm) PSOCT was performe...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2018.03.017
更新日期:2018-04-27 00:00:00
abstract::Osteogenesis imperfecta (OI) is a heritable disease, which results from an abnormal amount or structure of Type I collagen. Bisphosphonates, a class of synthetic antiresorptive drugs, used in osteoporosis management, are also used to decrease fracture incidence and improve quality of life in children with OI. In this ...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2008.09.028
更新日期:2008-12-05 00:00:00
abstract::Proper function of the female pelvic floor requires intact pelvic floor muscles (PFMs). The prevalence of pelvic floor disorders (PFDs) increases substantially with age, in part due to clinically identified deterioration of PFM function with age. However, the etiology of this decline remains largely unknown. We previo...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2019.109436
更新日期:2020-01-02 00:00:00
abstract::This paper presents a method for analyzing and comparing numerically Saphenous Vein Grafts (SVGs) following Coronary Artery Bypass Graft surgery (CABG). The method analyses the flow dynamics inside vein grafts with and without supporting using Venous External Scaffolding Technology (VEST). The numerical method uses pa...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2015.03.011
更新日期:2015-07-16 00:00:00
abstract::This paper describes the process used to generate lower limb kinematics during single limb stance phase of gait, using musculoskeletal modelling, muscle driven forward simulation and gradient based optimisation techniques (including design of experiment techniques). Initial inputs to the forward simulation process wer...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/s0021-9290(01)00240-8
更新日期:2002-05-01 00:00:00
abstract::An apparatus was designed for mechanical compression of cultured articular cartilage explants with acylindrical plain-ended loading head (diameter 2-5 mm) driven by a stepping motor. A load cell under the culture dish was applied for feedback regulation utilizing a microprocessor-based control unit. The operating prog...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/0021-9290(89)90232-7
更新日期:1989-01-01 00:00:00
abstract::This paperwork deals with the obtaining and characterisation of new acrylic cements for bone surgery. The final mixture of cement contains derivatives of methacryloyloxyethyl phosphate, methacrylic acid or 2-acrylamido-2-methyl-1-propane sulphonic acid. The idea of using these monomers is sustained by their ability to...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2007.05.002
更新日期:2007-01-01 00:00:00
abstract::The topographical distributions of the zonal properties of articular cartilage over the medial tibia from an experimental osteoarthritis (OA) model were evaluated as a function of external loading by microscopic Magnetic Resonance Imaging (µMRI). T2 relaxation times and cartilage thicknesses were measured at 17.6 µm r...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2015.08.011
更新日期:2015-10-15 00:00:00
abstract::Computational fluid dynamics (CFD) studies of airflow in a digital reference model of the 17-generation airway (bronchial tree) were accomplished using the FLUENT computational code, based on the anatomical model by Schmidt et al. [2004. A digital reference model of the human bronchial tree. Computerized Medical Imagi...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2007.12.019
更新日期:2008-01-01 00:00:00
abstract::Left ventricular (LV) chamber flow is undoubtedly influenced by the time-dependent regional motion of the LV wall. In an attempt to obtain diagnostic parameters based on LV chamber flow, we computed the LV chamber, two-dimensional systolic velocity and pressure distribution for two right anterior oblique (RAO) ventric...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/0021-9290(94)90201-1
更新日期:1994-02-01 00:00:00
abstract::Although we sometimes use the intrasynovial tendon allograft as a donor, the gliding ability of allograft prepared by lyophilization is significantly decreased. The gliding ability of the grafted tendon after tendon reconstruction is very important because the high gliding resistance causes more adhesion and leads to ...
journal_title:Journal of biomechanics
pub_type: 杂志文章
doi:10.1016/j.jbiomech.2010.12.030
更新日期:2011-06-03 00:00:00
abstract::One of the most popular methods to fabricate biomedical microfluidic devices is by using a soft-lithography technique. However, the fabrication of the moulds to produce microfluidic devices, such as SU-8 moulds, usually requires a cleanroom environment that can be quite costly. Therefore, many efforts have been made t...
journal_title:Journal of biomechanics
pub_type: 杂志文章,评审
doi:10.1016/j.jbiomech.2015.11.031
更新日期:2016-07-26 00:00:00