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The paper presents an analysis of factors influencing the accuracy of reproduction of geometry of the vertebrae and the intervertebral disc of the lumbar motion segment for the purpose of designing of an intervertebral disc endoprosthesis. In order to increase the functionality of the new type of endoprostheses by a better adjustment of their struc...
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Context 1
... involved adding or removing mask pixels with the use of a cursor. Figure 5 shows a model of L5 vertebra obtained from the mask edition. As a result, a solid model was obtained giving worse results in terms of the accuracy of the model reproduction. ...
Context 2
... model reproduction. The greater the number of triangles, the greater the accuracy of the repro- duction of the tissue surfaces. However, there are problems with processing of irregular and considerably compacted grids. Modeling of tissues in this stage ends with a removal of irregularities and processing of models into the form of smooth surfaces (Fig. 5b). From the point of view of the tissue mechanical properties, a bone is a non-linear and slightly flexible material of complex anisotropic multilevel structure. An effective analysis of the bony structures requires considering the physical characteristics of individual types of bony tissues of vertebral bodies. In order to reproduce a ...
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