Abstract：
:Aseptic loosening from polyethylene wear debris is the leading cause of failure for metal-on-polyethylene total hip implants. Third-body debris ingress to the bearing space results in femoral head roughening and acceleration of polyethylene wear. How third-body particles manage to enter the bearing space between the closely conforming articulating surfaces of the joint is not well understood. We hypothesize that one such mechanism is from convective fluid transport during subluxation of the total hip joint. To test this hypothesis, a three-dimensional (3D) computational fluid dynamics (CFD) model was developed and validated, to quantify fluid ingress into the bearing space during a leg-cross subluxation event. The results indicated that extra-articular joint fluid could be drawn nearly to the pole of the cup with even very small separations of the femoral head (<0.60mm). Debris suspended near the equator of the cup at the site of maximum fluid velocity just before the subluxation began could be transported to within 11 degrees from the cup pole. Larger head diameters resulted in increased fluid velocity at all sites around the entrance to the gap compared to smaller head sizes, with fluid velocity being greatest along the anterosuperolateral cup edge, for all head sizes. Fluid pathlines indicated that suspended debris would reach similar angular positions in the bearing space regardless of head size. Increased inset of the femoral head into the acetabular cup resulted both in higher fluid velocity and in transport of third-body debris further into the bearing space.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Lundberg HJ,Pedersen DR,Baer TE,Muste M,Callaghan JJ,Brown TDdoi
10.1016/j.jbiomech.2007.01.021subject
Has Abstractpub_date
2007-01-01 00:00:00pages
1676-85issue
8eissn
0021-9290issn
1873-2380pii
S0021-9290(07)00073-5journal_volume
40pub_type
杂志文章abstract：:Mechanical adaptions of cells, including stiffness variation, cytoskeleton remodeling, motion coordination, and shape changing, are essential for tissue morphogenesis, wound healing, and malignant progression. In this paper, we take confluent monolayers of Madin-Darby canine kidney (MDCK) and mouse myoblast (C2C12) ce...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2020.109763
更新日期：2020-05-07 00:00:00
abstract：:Characterising the passive anisotropic properties of soft tissues has been largely limited to the linear viscoelastic regime and shear loading is rarely done in the large deformation regime, despite the physiological significance of such properties. This paper demonstrates the use of eccentric rheology, which allows t...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2015.08.025
更新日期：2015-11-05 00:00:00
abstract：:The understanding of impact mechanics during locomotion is important for research within the fields of injury prevention and footwear design. Instrumented missiles offer a worthy solution to the lack of control inherent in in vivo activities and to the isolated nature of tissue studies. However, missiles cannot mimic ...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(95)00002-y
更新日期：1995-09-01 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：:The role of bone water in the activity of this organ is essential in structuring apatite crystals, providing pathways for nutrients and waste involved in the metabolism of bone cells and participating in bone remodelling mechanotransduction. It is commonly accepted that bone presents three levels of porosity, namely t...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2015.07.025
更新日期：2015-09-18 00:00:00
abstract：:Increasing diversity in the STEM (Science, Technology, Engineering, and Math) fields has become imperative to ensure equitable access to economic opportunity and to provide the technologically adept workforce of the future. The present STEM pipeline preferentially engages youth who are, not only aware of and intereste...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2019.109511
更新日期：2020-01-23 00:00:00
abstract：:The hypothesis that thrombus can be induced by localized shear stresses/rates, such as in the bent/stretched microvessels, was tested both experimentally and computationally. Our newly designed in vivo experiments were performed on the microvessels (post-capillary venules, 20-50 microm diameter) of rat mesentery. Thes...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2008.06.013
更新日期：2008-08-28 00:00:00
abstract：:A mathematical model of synovial film filtration and synovial gel formation at normal approach of cartilage surfaces in the human hip joint is presented. The biphasic mixture model presented in Part I of this paper [Hlavácek, J. Biomechanics 26, (1993)] for synovial fluid and that of Mow and his collaborators [J. Biom...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(93)90063-k
更新日期：1993-10-01 00:00:00
abstract：:The ability to monitor the healing of bone fractures is crucially important in their treatment. The aim of the present study was to develop and validate an objective method for monitoring fracture healing based on bone vibrational response. An analytic model was formulated, with which the mechanical parameters at the ...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(90)90060-g
更新日期：1990-01-01 00:00:00
abstract：:A more fundamental understanding about the act of manual lifting can be provided by the assessment of the total production of power and the power generated in joints. The present study is concerned with the validity of the estimations of these parameters. Four subjects lifted an 18.8 kg load while they were filmed and...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(92)90045-3
更新日期：1992-09-01 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
pub_type： 临床试验,杂志文章
doi：10.1016/s0021-9290(02)00438-4
更新日期：2003-04-01 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 recent years, computational structural analyses have emerged as important tools to investigate the mechanical response of stent placement into arterial walls. Although most coronary stents are expanded by inflating a polymeric balloon, realistic computational balloon models have been introduced only recently. In th...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2008.01.027
更新日期：2008-01-01 00:00:00
abstract：:The orientation of the line of pull and geometrical characteristics of rat semimembranosus lateralis muscle (SM1) were measured in a plane during isometric contractions at different muscle lengths. The orientation of the line of pull was always similar in our plane of analysis. It was always aligned with the external ...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(94)90051-5
更新日期：1994-09-01 00:00:00
abstract：:Cancellous bone architecture and mechanics are intimately related. The trabecular architecture of cancellous bone is considered determined by its mechanical environment (Wolff's law), and the mechanical properties of cancellous bone are inversely determined by the trabecular architecture and material properties. Much ...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/s0021-9290(96)00177-7
更新日期：1997-05-01 00:00:00
abstract：:This paper presents a general method for simulating the movement of the lower extremity during human walking. It is based upon two separate algorithms: one for single support (an open kinematic chain), and the other for the double support phase (a closed-loop linkage). Central to each of these is the recursive Newton-...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(88)90250-3
更新日期：1988-01-01 00:00:00
abstract：:Motion capture systems currently used in biomechanical analysis introduce systematic measurement errors that appear in the form of noise in recorded displacement signals. The noise is unacceptably amplified when differentiating displacements to obtain velocities and accelerations. To avoid this phenomenon, it is neces...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2004.05.031
更新日期：2005-05-01 00:00:00
abstract：:The influence of ankle kinematics and plantar pressure from mid-range barefoot running on T2 relaxation times of tibiotalar cartilage is unknown. This study aimed to quantitatively evaluate the T2 relaxation time of tibiotalar cartilage and ankle biomechanics following 5 km barefoot running. Twenty healthy runners (wh...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2019.04.046
更新日期：2019-06-11 00:00:00
abstract：:During respiration, upper airway (UA) collapse occurs when the forces generated from the negative UA pressures exceed the forces produced by the UA muscles; which leads to loose soft tissue at the back of the mouth. At predetermined titration pressure, the Continuous Positive Airway Pressure (CPAP) normally provides a...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2016.11.005
更新日期：2016-12-08 00:00:00
abstract：:The intervertebral disc is formed by the nucleus pulposus (NP) and annulus fibrosus (AF), and intervertebral tissue contains a large amount of negatively charged proteoglycan. When this tissue becomes deformed, a streaming potential is induced by liquid flow with positive ions. The anisotropic property of the AF tissu...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2011.06.018
更新日期：2011-09-02 00:00:00
abstract：:The slit arteriotomy for end-to-side arterial microanastomosis is a technique used to revascularize free flaps in reconstructive surgery. Does a slit open to a width sufficient for blood supply? How is the slit opening affected by factors, such as arterial wall thickness and material stiffness? To answer these questio...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2004.12.015
更新日期：2006-01-01 00:00:00
abstract：:Patient selection for lateral retinacular release (LRR) and its efficacy are controversial. Iatrogenic medial subluxation can occur with inappropriate LRR. The aim of this study was to determine the reduction in patellofemoral stability with progressively more extensive LRR. The force required to displace the patella ...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2008.11.003
更新日期：2009-02-09 00:00:00
abstract：:The purpose of this study was to find the optimal values of design parameters for a bicycle-rider system (crank length, pelvic inclination, seat height, and rate of crank rotation) which maximize the power output from muscles of the human lower limb during bicycling. The human lower limb was modelled as a planar syste...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(90)90322-t
更新日期：1990-01-01 00:00:00
abstract：:Traumatic injuries of the spine are mostly the consequence of rapid overload e.g. impact loading. In vitro investigations on this topic usually encompass biomechanical testing using frozen/thawed specimens and employ quasi-static loading conditions. It is generally accepted that a freezing/thawing cycle does not alter...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2011.07.011
更新日期：2011-09-02 00:00:00
abstract：:Knowledge of ligament fibre recruitment at the human ankle joint complex is a fundamental prerequisite for analysing mobility and stability. Previous experimental and modelling studies have shown that ankle motion must be guided by fibres within the calcaneofibular and tibiocalcaneal ligaments, which remain approximat...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2004.02.043
更新日期：2004-12-01 00:00:00
abstract：:Previous in-vivo studies suggest that the ratio of total lumbar rotation over pelvic rotation (lumbo-pelvic rhythm) during trunk sagittal movement is essential to evaluate spinal loads and discriminate between low back pain and asymptomatic population. Similarly, there is also evidence that the lumbo-pelvic rhythm is ...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2018.10.009
更新日期：2019-01-03 00:00:00
abstract：:The resultant centre of pressure (CP(Res)) trajectories are aimed at controlling body movements in upright stance. When standing on two legs, these trajectories are generated by exerting reaction forces under each foot and by loading-unloading mechanisms intervening at the hip level. To assess the respective contribut...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2006.11.003
更新日期：2007-01-01 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
pub_type： 杂志文章
doi：10.1016/s0021-9290(03)00245-8
更新日期：2004-02-01 00:00:00
abstract：:In this paper, a phenomenological constitutive model is constructed to describe the uniaxial ratchetting (i.e., the cyclic accumulation of inelastic deformation) of soft biological tissues in the framework of finite viscoelastic-plasticity. The model is derived from a polyconvex elastic free energy function and addres...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2014.01.004
更新日期：2014-03-21 00:00:00
abstract：:Human and animal limbs can be modelled as a chain of segments connected at joints. For a static limb, the force exerted at the endpoint due to the force of a single muscle has been calculated. It turns out that there are marked differences in the action of mono- vs. biarticular muscles. Monoarticular muscles produce a...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/s0021-9290(01)00056-2
更新日期：2001-08-01 00:00:00
