Abstract：
:Improper design of vertebral body cages may seriously affect the interface strength and cause the lose of fixation for a vertebral body replacement. This research used a FEM-based Taguchi method to investigate the effects of various factors to find the robust design of the body cage. Three-dimensional finite element models with a nonlinear contact analysis have been developed to simulate the pullout strength of the body cage. Then, the Taguchi robust design method was used to evaluate the spike design. In a situation without bone fusion, the spike row, the spike oblique, and the spike height were especially important factors. The optimum combination has been found to be the pyramidal spike type, a spike height of 2mm, a spike diameter of 2.2mm, an oblique geometry, 11 rows per 28 mm, and an inner diameter of 10mm. In a situation with bone fusion, the spike row, the spike height, and the inner diameter were the most significant factors. Here, the optimum combination has been found to be the conical spike type, a spike height of 2mm, a spike diameter of 2.2mm, an oblique geometry, 11 rows per 28 mm, and an inner diameter of 20mm. The finite element analyses could be used to predict the interface stiffness of the body cages. The FEM-based Taguchi methods have effectively decreased the time and effort required for evaluating the design variables of implants and have fairly assessed the contribution of each design variable.
journal_name
Med Eng Physjournal_title
Medical engineering & physicsauthors
Hsu WH,Chao CK,Hsu HC,Lin J,Hsu CCdoi
10.1016/j.medengphy.2008.07.001subject
Has Abstractpub_date
2009-04-01 00:00:00pages
287-94issue
3eissn
1350-4533issn
1873-4030pii
S1350-4533(08)00114-8journal_volume
31pub_type
杂志文章abstract：:During reconstructive surgery of the face, one side may be used as a template for the other, exploiting assumed bilateral facial symmetry. The best method to calculate this plane, however, is debated. A new semi-automatic technique for calculating the symmetry plane of the facial skeleton is presented here that uses s...
journal_title：Medical engineering & physics
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pub_type： 临床试验,杂志文章
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pub_type： 临床试验,杂志文章
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