An in vivo strain-gauge analysis of the squamosal-dentary joint reaction force during mastication and incisal biting in Macaca mulatta and Macaca fascicularis

1979 ◽  
Vol 24 (9) ◽  
pp. 689-697 ◽  
Author(s):  
W.L. Hylander ◽  
R. Bays
Keyword(s):  
Macaca Mulatta ◽  
Strain Gauge ◽  
Macaca Fascicularis ◽  
Reaction Force ◽  
Joint Reaction Force ◽  
Joint Reaction

Numerical predictions of hip joint and muscle forces during daily activities: A comparison of musculoskeletal models

2019 ◽  
Vol 233 (6) ◽  
pp. 636-647 ◽  
Author(s):  
Basil Mathai ◽  
Sanjay Gupta
Keyword(s):  
Hip Joint ◽  
Reaction Force ◽  
Daily Activities ◽  
Hip Implants ◽  
Muscle Forces ◽  
Joint Reaction Force ◽  
Musculoskeletal Models ◽  
Standing Up ◽  
Joint Reaction

Musculoskeletal loading plays an important role in pre-clinical evaluations of hip implants, in particular, bone ingrowth and bone remodelling. Joint force estimation using musculoskeletal models evolved as a viable alternative to in vivo measurement owing to the development of computational resources. This study investigated the efficiencies of four eminent open-source musculoskeletal models in order to determine the model that predicts the most accurate values of hip joint reaction and muscle forces during daily activities. Seven daily living activities of slow walking, normal walking, fast walking, sitting down, standing up, stair down and stair up were simulated in OpenSim using inverse dynamics method. Model predictions of joint kinematics, kinetics and muscle activation patterns were compared with published results. The estimated values of hip joint reaction force were found to corroborate well with in vivo measurements for each activity. Although the estimated values of hip joint reaction force were within a satisfactory range, overestimation of hip joint reaction force (75% BW of measured value) was observed during the late stance phase of walking cycles for all the models. In case of stair up, stair down, standing up and sitting down activities, the error in estimated values of hip joint reaction force were within ~20% BW of the measured value. Based on the results of our study, the London Lower Extremity Model predicted the most accurate value of hip joint reaction force and therefore can be used for applied musculoskeletal loading conditions for numerical investigations on hip implants.

Mechanism Analysis Using Implicit Constraints

2008 ◽  
Author(s):  
George H. Sutherland
Keyword(s):  
Equations Of Motion ◽  
Reaction Force ◽  
Mechanism Analysis ◽  
Kinematic Parameters ◽  
Joint Reaction Force ◽  
Dynamic Mechanisms ◽  
Joint Reaction Forces ◽  
Reaction Forces ◽  
Mechanism Kinematic ◽  
Joint Reaction

This paper introduces an approach to kinematic and dynamic mechanisms analysis where one or more joints are modeled using joint component relative displacements that approximate real joint behavior. This approach allows for the simultaneous nonrecursive solution for both mechanism kinematic parameters and selected dynamic joint reaction forces. Also, for closed loop mechanisms, the approach eliminates the need for forming explicit loop closure constraint equations, so that the dynamic equations of motion, derived using either the Newtonian or Lagrangian method, have a simplified unconstrained form. The key element underlying the approach is the formation of axioms for the standard mechanism joint types that describe the form of the joint reaction force and/or moment in terms of a virtual (or real) displacement between the joint components.

Computer-based estimation of the hip joint reaction force and hip flexion angle in three different sitting configurations

2017 ◽  
Vol 63 ◽  
pp. 99-105 ◽  
Author(s):  
J. Van Houcke ◽  
A. Schouten ◽  
G. Steenackers ◽  
D. Vandermeulen ◽  
C. Pattyn ◽  
...  
Keyword(s):  
Hip Joint ◽  
Reaction Force ◽  
Flexion Angle ◽  
Joint Reaction Force ◽  
Computer Based ◽  
Hip Flexion ◽  
Joint Reaction

Alterations in tibiotalar joint reaction force following syndesmotic injury are restored with static syndesmotic fixation

2019 ◽  
Vol 69 ◽  
pp. 156-163 ◽  
Author(s):  
Meghan Kelly ◽  
Daniel Vasconcellos ◽  
Walid S. Osman ◽  
Noorullah Masqoodi ◽  
Xavier Fowler ◽  
...  
Keyword(s):  
Reaction Force ◽  
Syndesmotic Injury ◽  
Joint Reaction Force ◽  
Tibiotalar Joint ◽  
Joint Reaction
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