Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Three-dimensional measurement of intervertebral kinematics in vitro using optical motion analysis

Holt, Catherine Avril, Evans, Samuel Lewin, Dillon, D. and Ahuja, Alka Surajprakash 2005. Three-dimensional measurement of intervertebral kinematics in vitro using optical motion analysis. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of engineering in medicine 219 (6) , pp. 393-399. 10.1243/095441105X34374

[img]
Preview
PDF
Download (249kB) | Preview

Abstract

Measurement of the stiffness of spinal motion segments is widely used for evaluating the stability of spinal implant constructs. A three-dimensional motion analysis technique has been developed that allows accurate measurement of the relative movement of the vertebral bodies about a well-defined anatomical axis system. The position of marker clusters on each vertebra is tracked using digital infrared cameras (Qualisys AB, Gothenburg). Landmarks are identified using a marked pointer, and an anatomical coordinate system is defined for each vertebra. The transformation relating the upper and lower vertebrae is calculated, using the joint coordinate system approach of Grood and Suntay to find the rotations and translations in each anatomical plane. The stiffness of vertebrectomy constructs was investigated using a Synex vertebral body replacement and an anterior rod with one or two screws in each vertebral body, with or without damage to the posterior longitudinal ligament (PLL). A moment of 2 N m was applied about each anatomical axis, and the range of motion about each axis was calculated. The range of motion in flexion-extension and lateral bending was significantly greater with only one screw. When the PLL was cut, there was no significant increase in the range of motion.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Centre for Advanced Manufacturing Systems At Cardiff (CAMSAC)
Engineering
Medicine
Uncontrolled Keywords: three-dimensional kinematics ; intervertebral kinematics ; spine ; spinal construct stiffness ; anterior and posterior spine instrumentation ; vertebrectomy
Publisher: Mechanical Engineering Publications
ISSN: 0954-4119
Last Modified: 04 Jun 2017 01:43
URI: http://orca.cf.ac.uk/id/eprint/2127

Citation Data

Cited 12 times in Google Scholar. View in Google Scholar

Cited 7 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics