Madonna, Tyler
(2017)
Effect of Repair Orientation on the Distal Biceps Tendon.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
The goal of the project was to quantify the effect of tendon orientation on the distal biceps tendon’s ability to generate supination torque, as measured by the moment arm. The anatomic orientation was defined as the external rotation of the tendon before inserting onto the radial tuberosity. The hypothesis was that an anatomic orientation repair would recreate a native tendon moment arm, while a non-anatomic orientation repair would impact the moment arm. Isometric supination torque was measured for the native distal biceps tendon, anatomically oriented repaired tendon, and non-anatomically oriented repair tendon in 8 cadaveric specimens. A computer controlled testing apparatus, which exerted known loads on the biceps tendon, was developed to measure isometric supination torque generated in the wrist of cadaveric elbows. During testing the biceps tendon was loaded and the generated supination torque was measured at three rotational positions: 60° pronation, neutral, and 60° supination. Forearm rotational positional significantly affected the moment arm but tendon orientation did not significantly affect the moment arm. The native tendon orientation had a mean moment arm of 8.22, 9.56, and 5.49 mm in 60° pronation, neutral, and 60° supination, respectively. The anatomic repair tendon orientation had a mean moment arm of 8.41, 9.61, and 5.42 mm in 60° pronation, neutral, and 60° supination, respectively. The non-anatomic repair tendon orientation had a mean moment arm of 8.30, 9.45, and 5.31 mm in 60° pronation, neutral, and 60° supination, respectively. Biomechanically, these findings suggest that tendon orientation had no effect on the moment arm. However, the effects of orientation on healing are not understood and it is not suggested that surgeons ignore the tendon orientation during repair. The results of this project could allow surgeons to better understand how distal biceps tendon orientation in surgical repairs affects function, which would lead to improved surgical techniques.
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Details
| Item Type: |
University of Pittsburgh ETD
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| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
13 June 2017 |
| Date Type: |
Publication |
| Defense Date: |
1 March 2017 |
| Approval Date: |
13 June 2017 |
| Submission Date: |
20 March 2017 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
49 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering |
| Degree: |
MS - Master of Science |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Biceps Rupture; Distal Biceps Tendon; Supination Moment Arm |
| Date Deposited: |
13 Jun 2017 17:45 |
| Last Modified: |
13 Jun 2017 17:45 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/30944 |
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