Date of Award

Spring 2015

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical & Aerospace Engineering

Program/Concentration

Mechanical Engineering

Committee Director

Stacie I. Ringleb

Committee Director

Matthew C. Hoch

Committee Member

Sebastian Bawab

Call Number for Print

Special Collections ; LD4331.E56 M26 2015

Abstract

Joint mobilization techniques have been shown to improve dorsiflexion range of motion after ankle injury in multiple in vivo studies; however, the underlying arthrokinematic effects of this treatment still require clarification. Therefore, the purpose of this preliminary study was to determine the viability of an open kinetic chain in vitro model for applying Maitland Grade III anterior/posterior joint mobilizations to the talocrural joint while examining the osteokinematic and arthrokinematic changes at the talocrural, subtalar and hindfoot joints. Three fresh frozen cadaver lower legs had Maitland Grade III anterior-to-posterior joint mobilization applied to the talocrural joint in 2 sessions of 200 oscillations. The changes in dorsiflexion and posterior translation range of motion were tracked using retroreflective sensors attached to the tibia, talus and calcaneus bones at baseline and between each joint mobilization session. At the talocrural joint, the change in dorsiflexion was -1.66 + 7.07', -1.48 + 8.76', -2.81 + 10.24 between the baseline and first joint mobilization session, first and second joint mobilization sessions and baseline to second joint mobilization session respectively. The change in posterior translation at the talocrural joint between baseline and first joint mobilization session, first and second joint mobilization sessions and baseline to second joint mobilization session were -0.45 + 0.83mm, 0.66 + 0.93 mm and -1.11 + 0.64 mm. The decrease in posterior translation suggests there was a posterior migration of the talus, which may have altered the axis of rotation between the talar dome and ankle mortise in an open kinetic chain. The results suggest the in vitro open kinetic chain model did not capture similar therapeutic effects as demonstrated in vivo studies.

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DOI

10.25777/36qq-sm11

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