ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This study was aimed at predicting moments with respect to diameters of wires forevaluating stability of the upper cervical spine fixed with wires based on the finite element analysis. Incase of the severe atlanto-axial instability, several surgical methods have been tried and the posteriorfixation using wires has been widely used because of the sufficient stability and high rate of bonyadhesion. The diameters of wires applied in this study were 0.7 mm, 0.9 mm and 1.25 mm. 1.5 Nm isthe moment for the normal physiological range of motion of the upper cervical spine in cadavermodels. However, if this moment is applied to the occiput, an excessive load occurs at theoccipito-atlantal joint and clinical problems can break out realistically. Thus, it is necessary to predictmoments for evaluating stability with respect to diameters of wires. The results showed that 0.7 mmwire allowed the biggest moment while 1.25 mm wire allowed the smallest moment. In addition, theupper cervical spine fused with wires was stabilized effectively as the load increased
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1098.pdf
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