DiNenna, Michael A.
(2022)
Shape Classification of the Anterior Cruciate Ligament Cross Section.
Master's Thesis, University of Pittsburgh.
(Unpublished)
This is the latest version of this item.
Abstract
The objective of this study is to quantifiably classify the shape of the cross section of the anterior cruciate ligament (ACL). This will be done with the use of a three-dimensional laser scanner to construct a solid model and mathematical analysis.
Ten freshly frozen cadaveric knees were used in this study. The intact knees were positioned in a six degrees of freedom robotic testing system. The knee was passively moved by the robot from full extension to 15 degrees flexion. The knee was then dissected so that only the ACL, tibia, and femur remained. The dissected knee was placed in the robot and placed into the same position of 15 degrees of flexion as the intact knee. The ACL was laser scanned and the insertions sites points were discretized. A three-dimensional model was constructed using software. The ligament axis was defined to be the line that connects the centroids of the two insertion sites. Five planes were defined perpendicular to this axis to represent the cross sections. Points outlining each cross section were compared to five shapes (ellipse, rectangle, triangle, peanut shape, and kidney shape) and the fit of the shape was measured using a Procrustes analysis.
Twenty-nine out of the fifty cross sections were found to be best fit to an ellipse. Compared to seven for triangle and kidney shape, five for rectangle, and only two for the peanut shape.
Overall, the ellipse provided the best fit for a plurality of the cross sections. This study may provide information to construct ACL grafts with shapes closer to that of the original tissue.
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Details
| Item Type: |
University of Pittsburgh ETD
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| Status: |
Unpublished |
| Creators/Authors: |
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| ETD Committee: |
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| Date: |
16 January 2022 |
| Date Type: |
Publication |
| Defense Date: |
2 November 2021 |
| Approval Date: |
16 January 2022 |
| Submission Date: |
1 November 2021 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
48 |
| 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: |
matrices, vector, Procrustes distance |
| Date Deposited: |
16 Jan 2022 17:55 |
| Last Modified: |
16 Jan 2022 17:55 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/41928 |
Available Versions of this Item
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Shape Classification of the Anterior Cruciate Ligament Cross Section. (deposited 16 Jan 2022 17:55)
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