ISSN:
1662-7482
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 paper presents the modelling of the effects due to load conditions on the cervicalsection defined between C3 and C5 after a cervical plate implant is used to transfer thecompression loads from C3 to C5 as C4 is considered to be damaged as a result of a medicalcondition. For this study, three different scenarios which describe the common motion condition ofthe head-neck system are modelled. The first one refers to the effect of the head weight over theconsidered section. In the second case the average patient weight is supported by C3 and C5vertebrae. The last case simulates extreme loading conditions as vertebrae lesions occur whenthese are compressed beyond its failure limit; the ultimate stress to compression load failure valueis applied to C3. The stability and mechanical behaviour of cervical plates under compressionloading conditions is evaluated using the Finite Element Method (FEM). Cervical plates are usefulto restore stability of the spine by improving the inter-vertebral fusion, particularly when thecervical body has been damaged. The results show that the stresses on the plate and fixationscrews, for the three cases, are within the elastic range. Conversely, it has to be considered thatcortical and trabecular bone densities vary from one patient to another due to a number of factors,which can influence the fixation conditions of the screws. In the case of this analysis, healthy boneconditions were considered and the obtained results show that the risk of the integrity of the screwimplant-vertebrae system is not compromised
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.13-14.49.pdf
Permalink