abstract：:The purpose of the current investigation was to use finite element analysis to quantify the complete strain field for the membranes of the Flexercell apparatus, a device extensively used to study the effects of mechanical loading on cultured cells. Four vacuum pressure simulations were run for the membrane for both th...

journal_title：Journal of biomechanics

authors： Vande Geest JP,Di Martino ES,Vorp DA

更新日期：2004-12-01 00:00:00

abstract：:The objective of this study was to compare micro- and macroscale friction coefficients of bovine articular cartilage. Microscale measurements were performed using standard atomic force microscopy (AFM) techniques, using a 5 microm spherical probe tip. Twenty-four cylindrical osteochondral plugs were harvested in pairs...

journal_title：Journal of biomechanics

authors： Park S,Costa KD,Ateshian GA

更新日期：2004-11-01 00:00:00

abstract：:The coronary arteries undergo large dynamic variations during each cardiac cycle due to their position on the beating heart. The local artery curvature varies significantly. In this study the influence of dynamic curvature on coronary artery hemodynamics is analyzed numerically. A realistic model of the bifurcation of...

journal_title：Journal of biomechanics

authors： Prosi M,Perktold K,Ding Z,Friedman MH

更新日期：2004-11-01 00:00:00

abstract：:The non-disabled human ankle joint was examined during walking in an attempt to determine overall system characteristics for use in the design of ankle prostheses. The hypothesis of the study was that the quasi-stiffness of the ankle changes when walking at different walking speeds. The hypothesis was examined using s...

journal_title：Journal of biomechanics

authors： Hansen AH,Childress DS,Miff SC,Gard SA,Mesplay KP

更新日期：2004-10-01 00:00:00

abstract：:The application of joint contact mechanics requires a precise configuration of the joint surfaces. B-Spline, and NURBS have been widely used to model joint surfaces, but because these formulations use a structured data set provided by a rectangular net first, then a grid, there is a limit to the accuracy of the models...

journal_title：Journal of biomechanics

authors： Hirokawa S,Ueki T,Ohtsuki A

更新日期：2004-10-01 00:00:00

abstract：:Risk for injury during a fall depends on the position and velocity of the body segments at the moment of impact. One technique for reducing impact velocity is to absorb energy in the lower extremity muscles during descent, as occurs during squatting or sitting. However, the protective value of this response may depend...

journal_title：Journal of biomechanics

authors： Robinovitch SN,Brumer R,Maurer J

更新日期：2004-09-01 00:00:00

abstract：:Evaluation of postural control is generally based on the interpretation of the center of pressure (COP) and the center of mass (COM) time series. The purpose of this study is to compare three methods to estimate the COM which are based on different biomechanical considerations. These methods are: (1) the kinematic met...

journal_title：Journal of biomechanics

authors： Lafond D,Duarte M,Prince F

更新日期：2004-09-01 00:00:00

abstract：:As a hybrid between a hypodermic needle and transdermal patch, we have used microfabrication technology to make arrays of micron-scale needles that transport drugs and other compounds across the skin without causing pain. However, not all microneedle geometries are able to insert into skin at reasonable forces and wit...

journal_title：Journal of biomechanics

authors： Davis SP,Landis BJ,Adams ZH,Allen MG,Prausnitz MR

更新日期：2004-08-01 00:00:00

abstract：:Bone mineral density (BMD) is the principal diagnostic tool used in clinical settings to diagnose and monitor osteoporosis. Experimental studies on ex vivo bone samples from multiple skeletal locations have been used to propose that their breaking stress bears a power-law relationship to volumetric BMD, with a locatio...

journal_title：Journal of biomechanics

authors： Rajapakse CS,Thomsen JS,Espinoza Ortiz JS,Wimalawansa SJ,Ebbesen EN,Mosekilde L,Gunaratne GH

更新日期：2004-08-01 00:00:00

abstract：:Stress analysis in the individual parts of the scapula under normal physiological conditions is necessary to understand the load transfer mechanism, its relation with morphology of bone and to analyse the deviations in stress patterns due to implantation of the glenoid. The purpose of this study was to obtain stress d...

journal_title：Journal of biomechanics

authors： Gupta S,van der Helm FC

更新日期：2004-07-01 00:00:00

abstract：:Groups of rats were killed at 2, 6, 12, and 24 months of age. From dissected left and right mandibles in each rat, three pairs of transverse sections were cut at the incisal, middle, and basal regions of the incisor. One section in each pair was loaded until failure and a stress-strain curve for the periodontal ligame...

journal_title：Journal of biomechanics

authors： Komatsu K,Shibata T,Shimada A,Viidik A,Chiba M

更新日期：2004-07-01 00:00:00

abstract：:Walking appears to be passively unstable in the lateral direction, requiring active feedback control for stability. The central nervous system may control stability by adjusting medio-lateral foot placement, but potentially with a metabolic cost. This cost increases with narrow steps and may affect the preferred step ...

journal_title：Journal of biomechanics

authors： Donelan JM,Shipman DW,Kram R,Kuo AD

更新日期：2004-06-01 00:00:00

abstract：:Patello-femoral disorders are often caused by changes of patello-femoral and/or tibio-femoral kinematics. However, until now there has been no quantitative in vivo technique, that is able to obtain 3D kinematics and contact areas of all knee compartments simultaneously on a non-invasive basis. The aim of this study wa...

journal_title：Journal of biomechanics

authors： von Eisenhart-Rothe R,Siebert M,Bringmann C,Vogl T,Englmeier KH,Graichen H

更新日期：2004-06-01 00:00:00

abstract：:High-resolution architecture-based finite element models are commonly used for characterizing the mechanical behavior of cancellous bone. The vast majority of studies use homogeneous material properties to model trabecular tissue. The objectives of this study were to demonstrate that inhomogeneous finite element model...

journal_title：Journal of biomechanics

authors： Bourne BC,van der Meulen MC

更新日期：2004-05-01 00:00:00

abstract：:This study looks at blood flow through four different right coronary arteries, which have been reconstructed from bi-plane angiograms. Five non-Newtonian blood models, as well as the usual Newtonian model of blood viscosity, are used to study the wall shear stress in each of these arteries at a particular point in the...

journal_title：Journal of biomechanics

authors： Johnston BM,Johnston PR,Corney S,Kilpatrick D

更新日期：2004-05-01 00:00:00

abstract：:Radiostereometric analysis (RSA) has become one of the recommended techniques for pre-market evaluation of new joint implant designs. In this study we evaluated the effect of repositioning of X-ray tubes and phantom model on the precision of the RSA method. In precision measurements, we utilized mean error of rigid bo...

journal_title：Journal of biomechanics

authors： Mäkinen TJ,Koort JK,Mattila KT,Aro HT

更新日期：2004-04-01 00:00:00

abstract：:Fibroblasts in intact tendons align with stretching direction, but they tend to orient randomly in healing tendons. Therefore, a question arises: Do fibroblast responses to mechanical stretching depend on their orientation? To address this question, human patellar tendon fibroblasts were grown in custom-made silicone ...

journal_title：Journal of biomechanics

authors： Wang JH,Yang G,Li Z,Shen W

更新日期：2004-04-01 00:00:00

abstract：:The purpose of this study was to predict and explain the pattern of shear force and ligament loading in the ACL-deficient knee during walking, and to compare these results to similar calculations for the healthy knee. Musculoskeletal modeling and computer simulation were combined to calculate ligament forces in the AC...

journal_title：Journal of biomechanics

authors： Shelburne KB,Pandy MG,Torry MR

更新日期：2004-03-01 00:00:00

abstract：:In this work we propose a method to estimate the elastic properties of the extracellular matrix of articular cartilage, once the elastic properties of the chondrocytes and the whole tissue are known. The influence of the elastic properties of the tissue and the cell concentration on the estimated elastic properties of...

journal_title：Journal of biomechanics

authors： Federico S,Herzog W,Wu JZ,La Rosa G

更新日期：2004-03-01 00:00:00

abstract：:Within the context of improving knowledge of the structure-function relations for trabecular bone for cyclic loading, we hypothesized that the S-N curve for cyclic compressive loading of trabecular bone, after accounting for differences in monotonic strength behavior, does not depend on either site or species. Thirty-...

journal_title：Journal of biomechanics

authors： Haddock SM,Yeh OC,Mummaneni PV,Rosenberg WS,Keaveny TM

更新日期：2004-02-01 00:00:00

abstract：:Human responses are critical to understanding injury biomechanics in blunt ballistic impacts, which are defined as 20-200 g projectiles impacting at 20-250 m/s. 13 human cadavers were exposed to three distinct ballistic impacts of the chest to determine force-time, deflection-time and force-deflection responses. Compa...

journal_title：Journal of biomechanics

authors： Bir C,Viano D,King A

更新日期：2004-01-01 00:00:00

abstract：:Mechanical forces regulate the function of bone cells. In this paper, the effects of cyclic stretching on osteoblasts derived from rat calvaria were studied at a magnitude occurring in physiological loaded bone tissue. A four-point bending apparatus was used to apply cyclic stretching on osteoblasts. Stretching at 500...

journal_title：Journal of biomechanics

authors： Tang LL,Wang YL,Pan J,Cai SX

更新日期：2004-01-01 00:00:00

abstract：:Muscle activity has previously been suggested to minimize soft-tissue resonance which occurs at heel-strike during walking and running. If this concept were true then the greatest vibration damping would occur when the input force was closest to the resonant frequency of the soft-tissues at heel-strike. However, this ...

journal_title：Journal of biomechanics

authors： Wakeling JM,Liphardt AM,Nigg BM

更新日期：2003-12-01 00:00:00

abstract：:Surgical treatment of proximal humeral fractures remains challenging in elderly patients, primarily due to insufficient implant fixation. Both bone quality and physiological-like loading conditions are commonly overlooked during pre-clinical in vitro evaluation. However, this knowledge is necessary in order to improve...

journal_title：Journal of biomechanics

authors： Maldonado ZM,Seebeck J,Heller MO,Brandt D,Hepp P,Lill H,Duda GN

更新日期：2003-12-01 00:00:00

abstract：:A conspicuous long-term consequence of hypertension is a thickening of the arterial wall, which many suggest returns the circumferential wall stress toward its normal value. This thickening results from an increase in smooth muscle and extracellular matrix, with the associated growth and remodeling processes depending...

journal_title：Journal of biomechanics

authors： Humphrey JD,Wilson E

更新日期：2003-11-01 00:00:00

abstract：:Plexiform bovine bone samples are repeatedly loaded in tension along their longitudinal axis. In order to induce damage in the bone tissue, bone samples are loaded past their yield point. Half of the bone samples from the damaged group were stored in saline to allow for viscoelastic recovery while the others were deca...

journal_title：Journal of biomechanics

authors： Kotha SP,Guzelsu N

更新日期：2003-11-01 00:00:00

abstract：:Bone represents a porous tissue containing a fluid phase, a solid matrix, and cells. Movement of the fluid phase within the pores or spaces of the solid matrix translates endogenous and exogenous mechanobiological, biochemical and electromechanical signals from the system that is exposed to the dynamic external enviro...

journal_title：Journal of biomechanics

authors： Knothe Tate ML

更新日期：2003-10-01 00:00:00

abstract：:We investigated the microstructural basis of a reduced stress concentration around the primary nutrient foramen of the equine third metacarpus. We quantified the spatial variations of compositional parameters (mineral content, volume fraction, histological architecture, and osteonal trajectories) from microradiographs...

journal_title：Journal of biomechanics

authors： Götzen N,Cross AR,Ifju PG,Rapoff AJ

更新日期：2003-10-01 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

authors： Reed KL,Brown TD,Conzemius MG

更新日期：2003-09-01 00:00:00

abstract：:We have developed a laser-aligned measuring device to facilitate the measurement of linear hand dimensions. Our objective has been to make a simple, clinically applicable device for anthropometry of the hands in patients with arthritis in order to gauge the progression of hand deformities. The system provides an alter...

journal_title：Journal of biomechanics

authors： Highton J,Davidson P,Markham V

更新日期：2003-09-01 00:00:00

abstract：:It has long been thought that intracranial saccular aneurysms enlarge and rupture because of mechanical instabilities. Recent nonlinear analyses suggest, however, that at least certain sub-classes of aneurysms do not exhibit quasi-static limit point instabilities or dynamic instabilities in response to periodic loadin...

journal_title：Journal of biomechanics

authors： David G,Humphrey JD

更新日期：2003-08-01 00:00:00

abstract：:The purpose of this study was to apply the Floating Axis analysis technique to the elbow joint, and to verify its ability to quantify clinically relevant radiohumeral translation in vitro using an electromagnetic tracking device. Of particular interest was the ability to quantify changes in anterior-posterior radial h...

journal_title：Journal of biomechanics

authors： Dunning CE,Duck TR,King GJ,Johnson JA

更新日期：2003-08-01 00:00:00

abstract：:Tumbling is a dynamic movement requiring control of the linear and angular momenta generated during the approach and takeoff phases. Both of these phases are subject to some variability even when the gymnast is trying to perform a given movement repeatedly. This paper used a simulation model of tumbling takeoff to est...

journal_title：Journal of biomechanics

authors： King MA,Yeadon MR

更新日期：2003-07-01 00:00:00

abstract：:Various foot structures are thought to influence forefoot plantar pressures during walking. High peak plantar pressures (PPP) during walking in people with diabetes mellitus (DM) and peripheral neuropathy (PN) can cause skin breakdown. The question addressed by this study is "What are the primary forefoot structural f...

journal_title：Journal of biomechanics

authors： Mueller MJ,Hastings M,Commean PK,Smith KE,Pilgram TK,Robertson D,Johnson J

更新日期：2003-07-01 00:00:00

abstract：:The three-dimensional geometry of the human spine is noteworthy information that can be obtained by stereoradiographic methods. These methods are based on the identification of anatomical structures in several views which are obtained by rotation of a patient standing on a turntable. Calibration algorithms for compute...

journal_title：Journal of biomechanics

authors： Dumas R,Mitton D,Laporte S,Dubousset J,Steib JP,Lavaste F,Skalli W

更新日期：2003-06-01 00:00:00

abstract：:The importance of the aortic root compliance in the aortic valve performance has most frequently been ignored in computational valve modeling, although it has a significant contribution to the functionality of the valve. Aortic root aneurysm or (calcific) stiffening severely affects the aortic valve behavior and, cons...

journal_title：Journal of biomechanics

authors： De Hart J,Baaijens FP,Peters GW,Schreurs PJ

更新日期：2003-05-01 00:00:00

abstract：:We evaluated whether lumped-parameter non-linear viscoelastic models of human fingertip tissue can describe fingertip force-displacement characteristics during a range of rapid, dynamic tapping tasks. Eight human subjects tapped with their index finger on the surface of a rigid load cell while an optical system tracke...

journal_title：Journal of biomechanics

authors： Jindrich DL,Zhou Y,Becker T,Dennerlein JT

更新日期：2003-04-01 00:00:00

abstract：:Joint moments are commonly used to characterize gait. Factors like height and weight influence these moments. This study determined which of two commonly used normalization methods, body mass or body weight times height, most reduced the effects of height and weight on peak hip, knee, and ankle external moments during...

journal_title：Journal of biomechanics

authors： Moisio KC,Sumner DR,Shott S,Hurwitz DE

更新日期：2003-04-01 00:00:00

abstract：:Computation of muscle excitation patterns that produce coordinated movements of muscle-actuated dynamic models is an important and challenging problem. Using dynamic optimization to compute excitation patterns comes at a large computational cost, which has limited the use of muscle-actuated simulations. This paper int...

journal_title：Journal of biomechanics

authors： Thelen DG,Anderson FC,Delp SL

更新日期：2003-03-01 00:00:00

abstract：:Adhesions of monocytes and platelets to a vascular surface, particularly in regions of flow stagnation, recirculation, and reattachment, are a significant initial event in a broad spectrum of particle-wall interactions that significantly influence the formation of stenotic lesions and mural thrombi. A number of approx...

journal_title：Journal of biomechanics

authors： Worth Longest P,Kleinstreuer C

更新日期：2003-03-01 00:00:00