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
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 proximal femur ...
Factors Affecting the Pullout Strength of Cancellous Bone Screws
Journal of Biomechanical Engineering - Tập 118 Số 3 - Trang 391-398 - 1996
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 of screw...
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
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
position an...
Microbubble Expansion in a Flexible Tube
Journal of Biomechanical Engineering - Tập 128 Số 4 - Trang 554-563 - 2006
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
method that t...
Comparative Analysis of Methods for Estimating Arm Segment Parameters and Joint Torques From Inverse Dynamics
Journal of Biomechanical Engineering - Tập 133 Số 3 - 2011
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
segment ...
Convergence Behavior of High-Resolution Finite Element Models of Trabecular Bone
Journal of Biomechanical Engineering - Tập 121 Số 6 - Trang 629-635 - 1999
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 models of tr...
Parameter Sensitivity Study of a Constrained Mixture Model of Arterial Growth and Remodeling
Journal of Biomechanical Engineering - Tập 131 Số 10 - 2009
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 and confi...
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
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
of colla...
Stress, Strain, and Mechanotransduction in Cells
Journal of Biomechanical Engineering - Tập 123 Số 6 - Trang 638-641 - 2001
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 to these...
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
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 (i.e., ...
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