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Thesis
Talus morphology and its functional implications on the ankle joint
Master of Science (M.S.), Drexel University
Jun 2011
DOI:
https://doi.org/10.17918/etd-3736
Abstract
A clear understanding of the ankle joint has applications from the design of ankle braces to the design of ankle implants and total ankle replacements. Examination of the articular trochlear surface of the talus can be used to describe talar morphology and explain ankle joint kinematics. A testing protocol was established to determine which of two anatomical axes; intermalleolar axis and trochlear cone axis; best approximates the axis of rotation of the ankle joint. Anatomical axes were located and oriented using anatomical landmarks obtained from CT images for the foot and ankle. An anatomical reference axis system was established to standardize the location and orientation of the anatomical axes. The talus geometry was approximated as the frustum of a cone, the axis of which potentially represented the axis of rotation of the ankle joint. The results showed that the ankle joint is not accurately modeled as a single fixed axis of rotation joint. The talus was best approximated as the frustum of a skewed cone. Due to the asymmetry, rotation about the skewed cone results in a constantly changing axis of rotation. Hence, the ankle joint was modeled as a single degree of freedom joint, the axis of rotation of which is constantly changing.
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Details
- Title
- Talus morphology and its functional implications on the ankle joint
- Creators
- Damani Y. Seale - DU
- Contributors
- Sorin Siegler (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Mechanical Engineering (and Mechanics) [Historical]; Drexel University
- Other Identifier
- 3736; 991014632200604721