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iDEA: DREXEL LIBRARIES E-REPOSITORY AND ARCHIVES

iDEA: DREXEL LIBRARIES E-REPOSITORY AND ARCHIVES

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Surface motion analysis for the natural ankle and for Total Ankle Replacements with different articular surface geometries

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Title
Surface motion analysis for the natural ankle and for Total Ankle Replacements with different articular surface geometries
Author(s)
Kulkarni, Rewati Pradeep
Advisor(s)
Siegler, Sorin, 1954-
Keywords
Mechanical engineering; Artificial ankle; Ankle--Surgery
Date
2016-09
Publisher
Drexel University
Thesis
M.S., Mechanical Engineering -- Drexel University, 2016
Abstract
The increasing success and establishment of arthroplasty procedures of the knee and hip over the years, has been reason enough for the want to create a functional Total Ankle Replacement, in an attempt to phase out ankle arthodesis. The implant models such as those developed by Inman and Buechel-Pappas were critical to this process gaining momentum. Most recently, the work of Siegler et al. proposed a new patient specific and anatomically accurate model of a TAR, which also attempts to reproduce the implant models with ligament stability, mechanical alignment, and joint kinematics. This study focusses on one of the aspects of joint kinematics of the ankle complex, namely, the surface to surface interaction of the bones and its analysis during the various types of motion, by means of distance mapping. During the physical experimentation, the individual bones of the ankle joint complex are fitted with fiduciary markers, which enables the recording of position data at predefined time steps and applied torque. This is done for the different neutral positions of the ankle, as well as the different types of motion of the ankle joint, namely, dorsi-plantar flexion, inversion-eversion, and internal-external rotation. These distance maps are gradient patterns on the articulating surfaces taken in pairs, which provide us with information regarding the displacement of the concerned bones at every time step, for a specific motion type. By studying these maps, we hope to achieve a more definitive analysis of the surface interaction of the bones whilst fit with a TAR model, thus helping us achieve an implant design with the best morphological replications.
URI
http://hdl.handle.net/1860/idea:6954
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