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Arn, MS Thesis - Final Revisions.pdf (1.19 MB)
ETD Abstract Container
Abstract Header
Towards a Novel Test for Osteoarthritis of the Acromioclavicular Joint
Author Info
Arn, Bethany Rose
ORCID® Identifier
http://orcid.org/0000-0001-7849-3229
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1606913182033391
Abstract Details
Year and Degree
2020, Master of Science, University of Toledo, Mechanical Engineering.
Abstract
Osteoarthritis is one of the oldest recorded diseases that can impair movement and cause pain—affecting over half of the elderly community, osteoarthritis of the acromioclavicular joint is one of the most common sources of shoulder pain due to its ability to break down tissues within a joint due to repeated mechanical loadings. These loading repetitions eventually begin to form osteophytes at the articulating surfaces of the joint effectively increasing the stress at the joint and decreasing the spacing. Due to this decrease of space, the clinical physical examinations done involve moving the arm into positions that decrease the space further causing acute pain at the joint. One of the current standard clinical physical examination tests is the Cross Body Adduction test which has been shown to close the joint spacing a significant enough amount to cause irritation and signal the presence of osteoarthritis. However, a new test involving placing the hand behind the back, called the Reverse Shoulder Internal Rotation Test—also referred to as the Hand Behind the Back test—has been proposed after it was observed clinically to provide a more accurate osteoarthritis diagnosis than the Cross Body Adduction test for some patients. Through this work, both the Cross Body Adduction and Hand Behind the Back tests were modeled in order to determine if there is merit for the Hand Behind the Back test to be used as a diagnostic tool for clinicians. Both tests were modeled using the Zygote Solid 3D 50
th
Percentile Male Human Anatomy model (ZYGOTE, American Fork, UT) for the bone 3D models and MSC.ADAMS (MSC Software, Newport Beach, CA) to compile and run the simulations. Within MSC.ADAMS the bones were given compact bone material properties and were outfitted with joints, single-component forces for muscles, springs for ligaments, and normal to the rib’s tangent springs to simulate the scapulothoracic articulation. Once the models were completed, the simulations were ran and it was found that the distance between the acromioclavicular joint articulating surfaces decreased by 0.3 mm for the Cross Body Adduction test and the Hand Behind the Back test demonstrated a spacing decrease of 1.65 mm—5.5x greater decrease than the Cross Body Adduction test. These results indicate that the Hand Behind the Back test may be a better diagnostic test for early stage osteoarthritis of the acromioclavicular joint due to the greater stress and irritation it places upon the joint. In order to validify these findings, further studies are required.
Committee
Mohamed Samir Hefzy (Committee Chair)
Brian Trease (Committee Member)
Abdulazim Mustapha (Committee Member)
Adam Schroeder (Committee Member)
Pages
82 p.
Subject Headings
Biomechanics
;
Engineering
;
Mechanical Engineering
Keywords
osteoarthritis
;
acromioclavicular joint
;
ac joint
;
ADAMS Software
;
ADAMS
;
biomechanics
;
biomechanical engineering
;
biomechanical
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RIS
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Citations
Arn, B. R. (2020).
Towards a Novel Test for Osteoarthritis of the Acromioclavicular Joint
[Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1606913182033391
APA Style (7th edition)
Arn, Bethany.
Towards a Novel Test for Osteoarthritis of the Acromioclavicular Joint.
2020. University of Toledo, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1606913182033391.
MLA Style (8th edition)
Arn, Bethany. "Towards a Novel Test for Osteoarthritis of the Acromioclavicular Joint." Master's thesis, University of Toledo, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1606913182033391
Chicago Manual of Style (17th edition)
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Document number:
toledo1606913182033391
Download Count:
407
Copyright Info
© 2020, some rights reserved.
Towards a Novel Test for Osteoarthritis of the Acromioclavicular Joint by Bethany Rose Arn is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Toledo and OhioLINK.
Release 3.2.12