Journal of Biomechanical Engineering

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Experimental Validation of a Finite Element Model of the Proximal Femur Using Digital Image Correlation and a Composite Bone Model
Journal of Biomechanical Engineering - Tập 133 Số 1 - 2011
Alexander Dickinson, Andrew C. Taylor, H. Öztürk, M. Browne
Computational biomechanical models are useful tools for supporting orthopedic implant design and surgical decision making, but because they are a simplification of the clinical scenario they must be carefully validated to ensure that they are still representative. The goal of this study was to assess the validity of the generation process of a structural finite element model of the proxima...... hiện toàn bộ
Factors Affecting the Pullout Strength of Cancellous Bone Screws
Journal of Biomechanical Engineering - Tập 118 Số 3 - Trang 391-398 - 1996
Jens R. Chapman, R. Harrington, K. M. Lee, Paul A. Anderson, A F Tencer, Damian Kowalski
Screws placed into cancellous bone in orthopedic surgical applications, such as fixation of fractures of the femoral neck or the lumbar spine, can be subjected to high loads. Screw pullout is a possibility, especially if low density osteoporotic bone is encountered. The overall goal of this study was to determine how screw thread geometry, tapping, and cannulation affect the holding power ...... hiện toàn bộ
Effects of Data Smoothing on the Reconstruction of Helical Axis Parameters in Human Joint Kinematics
Journal of Biomechanical Engineering - Tập 112 Số 2 - Trang 107-113 - 1990
A.H. de Lange, R. Huiskes, J.M.G. Kauer
In biomechanical joint-motion analyses, the continuous motion to be studied is often approximated by a sequence of finite displacements, and the Finite Helical Axis (FHA) or “screw axis” for each displacement is estimated from position measurements on a number of anatomical or artificial landmarks. When FHA parameters are directly determined from raw (noisy) displacement data, both the pos...... hiện toàn bộ
Microbubble Expansion in a Flexible Tube
Journal of Biomechanical Engineering - Tập 128 Số 4 - Trang 554-563 - 2006
Ye Tao, Joseph L. Bull
We have utilized a computational model of the expansion of a microbubble in a liquid-filled flexible tube to investigate the potential for acoustic vaporization of perfluorocarbon droplets to damage blood vessels during a novel gas embolotherapy technique for the potential treatment of tumors. This model uses a fixed grid, multi-domain, interface tracking, direct numerical simulation metho...... hiện toàn bộ
Comparative Analysis of Methods for Estimating Arm Segment Parameters and Joint Torques From Inverse Dynamics
Journal of Biomechanical Engineering - Tập 133 Số 3 - 2011
Davide Piovesan, Alberto Pierobon, Paul DiZio, James R. Lackner
A common problem in the analyses of upper limb unfettered reaching movements is the estimation of joint torques using inverse dynamics. The inaccuracy in the estimation of joint torques can be caused by the inaccuracy in the acquisition of kinematic variables, body segment parameters (BSPs), and approximation in the biomechanical models. The effect of uncertainty in the estimation of body ...... hiện toàn bộ
Convergence Behavior of High-Resolution Finite Element Models of Trabecular Bone
Journal of Biomechanical Engineering - Tập 121 Số 6 - Trang 629-635 - 1999
Glen L. Niebur, Jonathan C. Yuen, Andy C. Hsia, Tony M. Keaveny
The convergence behavior of finite element models depends on the size of elements used, the element polynomial order, and on the complexity of the applied loads. For high-resolution models of trabecular bone, changes in architecture and density may also be important. The goal of this study was to investigate the influence of these factors on the convergence behavior of high-resolution mode...... hiện toàn bộ
Parameter Sensitivity Study of a Constrained Mixture Model of Arterial Growth and Remodeling
Journal of Biomechanical Engineering - Tập 131 Số 10 - 2009
Andreas Valentin, Jay D. Humphrey
Computational models of arterial growth and remodeling promise to increase our understanding of basic biological processes, such as development, tissue maintenance, and aging, the biomechanics of functional adaptation, the progression and treatment of disease, responses to injuries, and even the design of improved replacement vessels and implanted medical devices. Ensuring reliability of a...... hiện toàn bộ
Examining Differences in Local Collagen Fiber Crimp Frequency Throughout Mechanical Testing in a Developmental Mouse Supraspinatus Tendon Model
Journal of Biomechanical Engineering - Tập 134 Số 4 - 2012
Kristin S. Miller, Brianne K. Connizzo, Elizabeth Feeney, Jennica J. Tucker, Louis J. Soslowsky
Crimp morphology is believed to be related to tendon mechanical behavior. While crimp has been extensively studied at slack or nondescript load conditions in tendon, few studies have examined crimp at specific, quantifiable loading conditions. Additionally, the effect of the number of cycles of preconditioning on collagen fiber crimp behavior has not been examined. Further, the dependence ...... hiện toàn bộ
Stress, Strain, and Mechanotransduction in Cells
Journal of Biomechanical Engineering - Tập 123 Số 6 - Trang 638-641 - 2001
Jay D. Humphrey
It is widely accepted that numerous cell types respond to mechanical stimuli, yet there is no general agreement as to whether particular cells respond directly to stress, strain, strain-rate, strain-energy, or other mechanical quantities. By recalling the definitions of the mathematical (not physical) concepts of stress and strain, it is suggested herein that cells cannot respond directly ...... hiện toàn bộ
Analysis of Prolapse in Cardiovascular Stents: A Constitutive Equation for Vascular Tissue and Finite-Element Modelling
Journal of Biomechanical Engineering - Tập 125 Số 5 - Trang 692-699 - 2003
Peter M. Prendergast, Caitríona Lally, Sally Daly, Alex Reid, T. C. Lee, D. F. Quinn, Finbar Dolan
The effectiveness of a cardiovascular stent depends on many factors, such as its ability to sustain the compression applied by the vessel wall, minimal longitudinal contraction when it is expanded, and its ability to flex when navigating tortuous blood vessels. The long-term reaction of the tissue to the stent is also device dependant; in particular some designs provoke in-stent restenosis...... hiện toàn bộ
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