D. Tejszerska

Application of 3D modeling and modern visualization technique to neurosurgical trigonocephaly correction in children

The attempt to a new methodology creation, supported neurosurgical correction of trigonocephaly by engineers is presented in this paper. Trigonocephaly is an example of skull deformity, that wrong influence on child physical and psychological development. Conventional procedures in such cases are connected with invasive operation. Up to now neurosurgeons during pre-operation planning of bones correction, based on their own knowledge and experience. Modeling in biomechanics connected with modern visualization methods give new possibilities of engineer support for medical procedures. Three-dimensional model of deformed skull was created on the basis of CT scans with use of Mimics software. The model was transformed to FEM and used for suitable shape of forehead bone determination. Material properties of modeled bones were assumed on the basis of experimental researches. The geometrical model was presented in 3-dimensional virtual reality. It helps to better imagine about the real shape of skull hidden under head skin and take the best decision how to operate the example of trigonocephaly.

Biomechanical Analysis of Funnel Chest after Correction of Deformation by Stabilizing Plate

In this work an attempt to determine state of load in funnel chest after correction of deformation by stabilizing plate was made. From biomechanical point of view the knowledge of load value affecting the stabilizer is necessary to select optimal parameters of the plate. The force value affecting the plate used for correction of deformation of the chest by Nuss’ method was evaluated on the base of funnel chest skeleton model formulated in ANSYS. Research works which aim was to select optimal thickness of the plate were carried out in next stage. In this work a parametric model of the plate was formulated, where thickness, length, width and flexion size of the plate are parameters of the model. Calculations were conducted for three alternative constraints.