Three-Dimensional Kinematic Modelling of the Human Shoulder Complex—Part II: Mathematical Modelling and Solution Via Optimization

1989 ◽  
Vol 111 (2) ◽  
pp. 113-121 ◽  
Author(s):  
S. T. Tu¨mer ◽  
A. E. Engin
Keyword(s):  
Optimization Problem ◽  
Kinematic Model ◽  
Three Dimensional ◽  
Joint Motion ◽  
Upper Arm ◽  
Complex Part ◽  
Kinematic Modelling ◽  
Shoulder Complex ◽  
The Individual

In this paper, individual joint sinus cones associated with the sternoclavicular, claviscapular, and glenohumeral joints of the three-dimensional kinematic model introduced in Part I for the human shoulder complex are quantitatively determined. First, mathematical description of the humerus orientation with respect to torso is given in terms of eight joint variables. Since the system is a kinematically redundant one, solution for the joint variables satisfying a prescribed humerus orientation is possible only if additional requirements are imposed; and the “minimum joint motion” criterion is introduced for this purpose. Two methods, namely the Lagrange multipliers and flexible tolerance methods, are formulated and tested for the optimization problem. The statistical in-vivo data base for the circumductory motion of the upper arm is employed to determine a set of joint variables via optimization, which are then utilized to establish the sizes and orientations of the elliptical cones for the individual joint sinuses. The results are discussed and compared with those given on the basis of measurements made on cadaveric specimens.

Three-Dimensional Kinematic Modelling of the Human Shoulder Complex—Part I: Physical Model and Determination of Joint Sinus Cones

1989 ◽  
Vol 111 (2) ◽  
pp. 107-112 ◽  
Author(s):  
A. E. Engin ◽  
S. T. Tu¨mer
Keyword(s):  
Kinematic Model ◽  
Quantitative Description ◽  
Three Dimensional ◽  
Direct Methods ◽  
Composite Joint ◽  
Proposed Model ◽  
Shoulder Complex ◽  
Unit Vectors

Modelling of the human shoulder complex is essential for the multi-segmented mathematical models as well as design of the shoulder mechanism of anthropometric dummies. In Part I of this paper a three-dimensional kinematic model is proposed by utilizing the concepts of kinematic links, joints, and joint sinuses. By assigning appropriate coordinate systems, parameters required for complete quantitative description of the proposed model are identified. The statistical in-vivo data base established by Engin and Chen (1986) is cast in a form compatible with the model by obtaining a set of unit vectors describing circumductory motion of the upper arm in a torso-fixed coordinate system. This set of unit vectors is then employed in determining the parameters of a composite shoulder complex sinus of a simplified version of the proposed model. Two methods, namely the flexible tolerance and the direct methods, are formulated and tested for the determination of an elliptical cone surface for a given set of generating unit vectors. Numerical results are presented for the apex angles and orientation of the composite joint sinus cone with respect to the anatomical directions.

Radula-centric and odontophore-centric kinematic models of swallowing inAplysia californica

2002 ◽  
Vol 205 (14) ◽  
pp. 2029-2051 ◽  
Author(s):  
Richard F. Drushel ◽  
Greg P. Sutton ◽  
David M. Neustadter ◽  
Elizabeth V. Mangan ◽  
Benjamin W. Adams ◽  
...  
Keyword(s):  
Kinematic Model ◽  
Three Dimensional ◽  
Rigid Bodies ◽  
High Temporal Resolution ◽  
Buccal Mass ◽  
Kinematic Models ◽  
Dimensional Shape ◽  
Position Parameter ◽  
Three Dimensional Shape

SUMMARYTwo kinematic models of the radula/odontophore of the marine mollusc Aplysia californica were created to characterize the movement of structures inside the buccal mass during the feeding cycle in vivo. Both models produce a continuous range of three-dimensional shape changes in the radula/odontophore, but they are fundamentally different in construction. The radulacentric model treats the radular halves as rigid bodies that can pitch, yaw and roll relative to a fixed radular stalk, thus creating a three-dimensional shape. The odontophore-centric model creates a globally convex solid representation of the radula/odontophore directly, which then constrains the positions and shapes of internal structures. Both radula/odontophore models are placed into a pre-existing kinematic model of the I1/I3 and I2 muscles to generate three-dimensional representations of the entire buccal mass. High-temporal-resolution, mid-sagittal magnetic resonance(MR) images of swallowing adults in vivo are used to provide non-invasive, artifact-free shape and position parameter inputs for the models. These images allow structures inside the buccal mass to be visualized directly, including the radula, radular stalk and lumen of the I1/I3 cavity. Both radula-centric and odontophore-centric models were able to reproduce two-dimensional, mid-sagittal radula/odontophore and buccal mass kinematics,but the odontophore-centric model's predictions of I1/I3, I2 and I7 muscle dimensions more accurately matched data from MR-imaged adults and transilluminated juveniles.

Three-Dimensional in Vivo Kinematics of the Shoulder during Humeral Elevation

1998 ◽  
Vol 14 (3) ◽  
pp. 312-326 ◽  
Author(s):  
Timothy J. Koh ◽  
Mark D. Grabiner ◽  
John J. Brems
Keyword(s):  
Video Analysis ◽  
Three Dimensional ◽  
Movement Pattern ◽  
Helical Axis ◽  
Euler Angles ◽  
In Vivo Kinematics ◽  
Shoulder Complex ◽  
Shoulder Motion ◽  
Shoulder Kinematics

Shoulder kinematics, including scapular rotation relative to the trunk and humeral rotation relative to the scapula, were examined during humeral elevation in three vertical planes via video analysis of intracortical pins. Helical axis parameters provided an easily interpretable description of shoulder motion not subject to the limitations associated with Cardan/Euler angles. Between 30 and 150° of elevation in each plane, the scapula rotated almost solely about an axis perpendicular to the scapula. Additional scapular rotation appeared to support the notion that the scapula moves “toward” the plane of elevation. Humeral rotation took place mainly in the plane of the scapula independent of the plane of elevation. Many parameters of shoulder complex kinematics were quite similar across all planes of elevation, suggesting a consistent movement pattern with subtle differences associated with the plane of elevation.

A Technique for Kinematic Modeling of Anatomical Joints

1980 ◽  
Vol 102 (4) ◽  
pp. 311-317 ◽  
Author(s):  
H. J. Sommer ◽  
N. R. Miller
Keyword(s):  
Kinematic Model ◽  
Nonlinear Least Squares ◽  
Joint Motion ◽  
Kinematic Modeling ◽  
Universal Joint ◽  
General Technique ◽  
Motion Data ◽  
Physiological Loading ◽  
The Right

This paper describes a general technique for fitting a spatial kinematic model to an in-vivo anatomical joint under typical physiological loading conditions. The method employs a nonlinear least squares algorithm to minimize the aggregate deviation between postulated model motion and experimentally measured anatomical joint motion over multiple joint positions. Estimation of the parameters of a universal joint with skew-oblique revolutes to best reproduce wrist motion was used as an example. Experimental motion data from the right wrists of five subjects were analyzed. The technique performed very well and produced repeatable results consistent with previous biomechanical wrist findings.

Determining Dual Euler Angles of the Ankle Complex in vivo Using “Flock of Birds” Electromagnetic Tracking Device

2005 ◽  
Vol 127 (1) ◽  
pp. 98-107 ◽  
Author(s):  
Ning Ying ◽  
Wangdo Kim
Keyword(s):  
Three Dimensional ◽  
Euler Angles ◽  
Joint Motion ◽  
Electromagnetic Tracking ◽  
Kinematic Coupling ◽  
Alternative Approach ◽  
Ankle Complex ◽  
Coupling Characteristics ◽  
Tracking Device

The dual Euler angles method has been proposed as an alternative approach to describe the general spatial human joint motion. In this study, the dual Euler angles method was applied to study the three-dimensional motion of the ankle complex. The methodology for obtaining dual Euler angles of the ankle complex was developed by using a “Flock of Birds” electromagnetic tracking device. The repeatability of the methodology was studied based on the intertester and intratester variability analysis. Finally kinematic coupling characteristics of the ankle complex during dorsiflexion–plantarflexion, eversion–inversion, and abduction–adduction were analyzed according to the parameters of the dual Euler angles.

In vivo analysis of acromioclavicular joint motion after hook plate fixation using three-dimensional computed tomography

2015 ◽  
Vol 24 (7) ◽  
pp. 1106-1111 ◽  
Author(s):  
Yoon Sang Kim ◽  
Yon-Sik Yoo ◽  
Seong Wook Jang ◽  
Ayyappan Vijayachandran Nair ◽  
Hyonki Jin ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Acromioclavicular Joint ◽  
Plate Fixation ◽  
Three Dimensional ◽  
Hook Plate ◽  
Joint Motion ◽  
In Vivo Analysis

scholarly journals Wear of glass-ceramic-veneered zirconia posterior FPDs after 10 years

2020 ◽  
Author(s):  
Ragai Edward Matta ◽  
Constantin Motel ◽  
Elena Kirchner ◽  
Simon Stelzer ◽  
Werner Adler ◽  
...  
Keyword(s):  
Glass Ceramic ◽  
Multiple Testing ◽  
Clinical Success ◽  
Three Dimensional ◽  
Rank Test ◽  
Minimal Distance ◽  
Significance Level ◽  
The Individual ◽  
Volume Decrease

Abstract Background: The abrasion behavior of various ceramics is rarely investigated, though it is relevant for the clinical success of such restorations. The aim of this in vivo study was to evaluate the wear of glass-ceramic-veneered zirconium oxide frameworks over a period of at least 10 years.Methods: The abrasion behavior of 15 bridge constructions from 15 different participants was examined after a period of 3, 5, and 10 years using plaster models, which were then subjected to a scanning process on the Atos II industrial scanner and digitized for three-dimensional evaluation of the abrasion by the corresponding software (ATOS Professional 7.6). The individual post-examination models were compared to the baseline model and deviations calculated in the sense of the largest, punctual loss of material in millimeters ("minimal distance"), the average abrasion in millimeters ("mean distance"), and the volume decrease in cubic millimeters ("integrated distance"). Statistical analyses were performed using the Wilcoxon sign rank test or mixed regression models. Multiple testing was considered by Benjamini-Hochberg correction. The significance level was set at 0.05.Results: We found steadily increasing wear of the ceramic. The average volume decrease was significant (P < 0.001) at 3 years and 10 years (-3.25 mm3 and -8.11 mm3, respectively).Conclusions: The results of this study indicate that the rate of volume loss in glass-ceramic-veneered zirconia frameworks in the posterior region increases significantly over time. An increasing frequency of parameters was observed, particularly in the second half of the study period. However, the use of this class of materials can be considered clinically acceptable.

Three-dimensional in vivo displacements of the shoulder complex from biplanar radiography

2005 ◽  
Vol 27 (3) ◽  
pp. 214-222 ◽  
Author(s):  
E. Berthonnaud ◽  
G. Herzberg ◽  
K. D. Zhao ◽  
K. N. An ◽  
J. Dimnet
Keyword(s):  
Three Dimensional ◽  
Shoulder Complex

scholarly journals Wear of feldspathic-ceramic-veneered zirconia posterior FPDs after 10 years

2020 ◽  
Author(s):  
Ragai Edward Matta ◽  
Constantin Motel ◽  
Elena Kirchner ◽  
Simon Stelzer ◽  
Werner Adler ◽  
...  
Keyword(s):  
Multiple Testing ◽  
Clinical Success ◽  
Three Dimensional ◽  
Rank Test ◽  
Minimal Distance ◽  
Significance Level ◽  
Mixed Regression ◽  
The Individual ◽  
Volume Decrease

Abstract Background: The abrasion behavior of various ceramics is rarely investigated, though it is relevant for the clinical success of such restorations. The aim of this in vivo study was to evaluate the wear of feldspathic-ceramic-veneered zirconium oxide frameworks over a period of at least 10 years.Methods: The abrasion behavior of 15 bridge constructions from 15 different participants was examined after a period of 3, 5, and 10 years using plaster models, which were then subjected to a scanning process on the Atos II industrial scanner and digitized for three-dimensional evaluation of the abrasion by the corresponding software (ATOS Professional 7.6). The individual post-examination models were compared to the baseline model and deviations calculated in the sense of the largest, punctual loss of material in millimeters ("minimal distance"), the average abrasion in millimeters ("mean distance"), and the volume decrease in cubic millimeters ("integrated distance"). Statistical analyses were performed using the Wilcoxon sign rank test or mixed regression models. Multiple testing was considered by Benjamini-Hochberg correction. The significance level was set at 0.05.Results: We found steadily increasing wear of the ceramic. The average volume decrease was significant (P < 0.001) at 3 years and 10 years (-3.25 mm3 and -8.11 mm3, respectively).Conclusions: The results of this study indicate that the rate of volume loss in feldspathic-ceramic-veneered zirconia frameworks in the posterior region increases significantly over time. An increasing frequency of parameters was observed, particularly in the second half of the study period. However, the use of this class of materials can be considered clinically acceptable.This study is registered in DRKS - German Clinical Trials Register with the register number 00021743.

The calculation of a human lumped-mass model from acceleration and force-plate data

2002 ◽  
Vol 216 (5) ◽  
pp. 333-340 ◽  
Author(s):  
J Shippen
Keyword(s):  
Motion Tracking ◽  
Tracking System ◽  
Kinematic Model ◽  
Force Plate ◽  
Three Dimensional ◽  
Contact Forces ◽  
Lumped Mass ◽  
Mass Model ◽  
Individual Subject ◽  
The Individual

This paper describes a technique for the calculation of a lumped-mass representation of a human based on acceleration of body locations, typically obtained from a three-dimensional motion tracking system, and external forces and torques, typically measured from a force plate. The inverse problem of solving for lumped masses is presented, which results in a mass model of the individual subject via a fast, fully automated approach. This method can be used to obtain the mass model per se for the identification of growth deformities or together with a kinematic model for inverse and forward dynamics. Furthermore the mass model and acceleration trajectories subsequently can be used to calculate the contact forces between the floor and the subject at locations remote to a force plate.

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