A Methodology for Evaluating the Sensitivity of Wrist Ligament Strain to Fracture Reduction Tolerances

Abarbanel, Brian; Horn, Blase; Kotob, Mohammad; Kersh, Mariana

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https://hdl.handle.net/2142/77711 Copy

Description

Title

A Methodology for Evaluating the Sensitivity of Wrist Ligament Strain to Fracture Reduction Tolerances

Author(s)

• Abarbanel, Brian
• Horn, Blase
• Kotob, Mohammad
• Kersh, Mariana

Contributor(s)

Kersh, Mariana E.

Issue Date

2015-05

Keyword(s)

• Mechanical Science and Engineering
• Ligament
• fracture
• reduction
• strain
• tolerance

Abstract

Distal radius fractures, such as the Colles fracture, are common injuries sustained within all age groups. Failure to properly realign a fracture a practice known as reduction - can lead to decreased joint motion, grip strength, increased stiffness and pain. Unfortunately, medical practitioner training of fracture reductions is limited with minimal understanding of the related mechanics. Our aim is to develop a methodology for evaluating the sensitivity of wrist ligament strain to fracture reduction tolerances. A simplified anatomical model of the bones in the wrist joint will serve as the foundation for the experiments. The contribution of ligaments to passive resistance will be modeled using six elastic bands spanning the wrist. Optical markers will be affixed at five points along each band, and motion capture data will be collected of the marker positions during wrist flexion and extension. Measurements using a non-fractured radius will be collected, after which a Colles fracture will be introduced and subsequently reduced. The effect of the reduction tolerances will be evaluated by measuring the ligament strain while changing three radiological parameters: volar tilt, radial inclination, and radial height. These parameters will be carefully adjusted using a three dimensional fixation device developed in house. Identifying the sensitivity of wrist movement to reduction parameters will allow for the development of a simulation tool that will aid in the instruction of wrist fracture reduction for healthcare professionals, ultimately leading to improved patient outcomes.

Type of Resource

image

Language

en

Permalink

http://hdl.handle.net/2142/77711

Copyright and License Information

• Copyright 2015 Brian Abarbanel
• Copyright 2015 Blase Horn
• Copyright 2015 Mohammad Kotob
• Copyright 2015 Mariana Kersh

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