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Biomechanical analysis of a novel built-in synthetic axis: A finite aspect examine.
Drugs (Baltimore). 2017 Nov;96(47):e8597
Authors: Zheng Y, Wang J, Liao S, Zhang D, Zhang J, Ma L, Xia H
Summary
Numerous modified devices are used for the anterior reconstruction of the tumor lesion affecting the second cervical vertebra, however there have been no reviews relating to particular person built-in synthetic axis (IAA) prosthesis fabricated by selective laser melting. Within the current work, a brand new sort of IAA prosthesis has been designed with a three-dimensional (3D) finite aspect mannequin of regular occiput-the fourth cervical vertebra being established to evaluate its biomechanics. For simple comparability, one other 3D finite aspect mannequin can be established for the T-shaped Harms cage and a further posterior fixation was carried out on every mannequin. The fashions are examined underneath a preliminary loading of 40 N to simulate cervical bodily motion together with flexion, extension, lateral bending, and rotation. Below numerous hundreds from four totally different instructions, the utmost stress and displacement of the IAA are lower than these of the modified T-shaped Harms cage. Apart from flexion, the utmost stress of the third cervical vertebra endplate of the IAA is smaller than that of the modified T-shaped Harms cage. The brand new prosthesis with axis is an efficient selection for higher cervical operation, which not solely can tremendously enhance the operation stability of the higher cervical phase but in addition may considerably cut back the chance of fixation failure attributable to Harms cage subsidence.
PMID: 29381931 [PubMed – indexed for MEDLINE]