Journal ArticleDOI
Musculo-skeletal loading conditions at the hip during walking and stair climbing.
Markus O. Heller,Georg Bergmann,G. Deuretzbacher,Lutz Dürselen,M. Pohl,Lutz Claes,Norbert Haas,Georg N. Duda +7 more
TLDR
The presented approach is considered as a useful means to determine valid conditions for the analysis of prosthesis loading, bone modeling or remodeling processes around implants and fracture stability following internal fixation.About:
This article is published in Journal of Biomechanics.The article was published on 2001-07-01. It has received 425 citations till now. The article focuses on the topics: Stair climbing & Contact force.read more
Citations
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Journal ArticleDOI
Hip contact forces and gait patterns from routine activities.
Georg Bergmann,Georg Deuretzbacher,Markus O. Heller,Friedmar Graichen,Antonius Rohlmann,J Strauss,Georg N. Duda +6 more
TL;DR: The paper focuses on the loading of the femoral implant component but complete data are additionally stored on an associated compact disc that contains complete gait and hip contact force data as well as calculated muscle activities during walking and stair climbing and the frequencies of daily activities observed in hip patients.
Journal ArticleDOI
Static and dynamic optimization solutions for gait are practically equivalent
TL;DR: In this article, the authors compared a dynamic solution with two static solutions to estimate muscle forces during normal gait and found that the dynamic solution provided better estimates of muscle forces than the static solution.
Journal ArticleDOI
Biomechanics and muscle coordination of human walking. Part I: introduction to concepts, power transfer, dynamics and simulations.
Felix E. Zajac,Felix E. Zajac,Richard R. Neptune,Richard R. Neptune,Steven A. Kautz,Steven A. Kautz +5 more
TL;DR: This work elucidate how energy produced by muscles is delivered to the crank through the synergistic action of other non-energy producing muscles; specifically, that a major function performed by a muscle arises from the instantaneous segmental accelerations and redistribution of segmental energy throughout the body caused by its force generation.
Journal ArticleDOI
Standardized Loads Acting in Hip Implants
TL;DR: Proposals for the most demanding activities, the time courses of the contact forces and the required cycle numbers for testing are given here and it was shown that friction only very slightly influences the stresses in the implant neck and shaft.
Journal ArticleDOI
Tibio-femoral loading during human gait and stair climbing.
TL;DR: The data demonstrate that high contact and shear forces are generated during weight bearing combined with knee flexion angles greater than approximately 15° and Clinically, the conditions that produce these larger contact forces should be avoided during post‐operative rehabilitation.
References
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Journal ArticleDOI
Hip contact forces and gait patterns from routine activities.
Georg Bergmann,Georg Deuretzbacher,Markus O. Heller,Friedmar Graichen,Antonius Rohlmann,J Strauss,Georg N. Duda +6 more
TL;DR: The paper focuses on the loading of the femoral implant component but complete data are additionally stored on an associated compact disc that contains complete gait and hip contact force data as well as calculated muscle activities during walking and stair climbing and the frequencies of daily activities observed in hip patients.
Journal ArticleDOI
A physiologically based criterion of muscle force prediction in locomotion
TL;DR: The inversely-nonlinear relationship of muscle contraction force and the possible contraction duration is utilized in a method to mathematically predict individual muscle forces and shows substantial agreement with that activity pattern predicted when endurance is used as the optimization criterion.
Journal ArticleDOI
Hip joint loading during walking and running, measured in two patients
TL;DR: In one hip in the first patient and in the second patient the direction of large forces approximated the average anteversion of the natural femur, so the joint loading was observed over the first 30 and 18 months, respectively, following implantation.
Journal ArticleDOI
Bone position estimation from skin marker co-ordinates using global optimisation with joint constraints.
TL;DR: It is suggested that, with joint constraints and a global error compensation scheme, the effects of measurement errors on the reconstruction of the musculoskeletal system and subsequent mechanical analyses can be reduced globally.
Journal ArticleDOI
Effects of mechanical factors on the fracture healing process.
Lutz E. Claes,Christa A. Heigele,Cornelia Neidlinger-Wilke,Daniela Kaspar,W. Seidl,Kristen J. Margevicius,Peter Augat +6 more
TL;DR: It is hypothesized that gap size and the amount of strain and hydrostatic pressure along the calcified surface in the fracture gap are the fundamental mechanical factors involved in bone healing.