A Cad-Based Conceptual Method for Skull Prosthesis Modelling

Abstract

The geometric modeling of a personalized part of the tissue built according to individual morphology is an essential requirement in anatomic prosthesis. A 3D model to fill the missing areas in the skull bone requires a set of information sometimes unavailable. The unknown information can be estimated through a set of rules referenced to a similar yet known set of parameters of the similar CT image. The proposed method is based on the Cubic Bezier Curves descriptors generated by the de Casteljou algorithm in order to generate a control polygon. This control polygon can be compared to a similar CT slice in an image database. The level of similarity is evaluated by a meta-heuristic fitness function. The research shows that it is possible to reduce the amount of points in the analysis from the original edge to an equivalent Bezier curve defined by a minimum set of descriptors. A study case shows the feasibility of method through the interoperability between the prosthesis descriptors and the CAD environment.

Reconstruction of Medical Images Using Artificial Bee Colony Algorithm

“…Then, it will be connected in the form of Bézier curve before being simulated by the system. Other than that, Bézier curve has also been used in prosthesis modelling problem whereby the curve had been applied to create the contours descriptors [27]. Therefore, in this study, cubic Bézier curve will be applied to reconstruct the medical images.…”

In Silico Optimization of Femoral Fixator Position and Configuration by Parametric CAD Model

“…The geometry of finite element (FE) models of bones and fixators is typically based on underlying computer-aided design (CAD) models. With regard to CAD and FE models of bones, the most important concerns are representation of complex bone geometry [19,20,21,22,23,24,25,26], characterization of specific material properties [23,24,25], and universal definition of anatomical landmarks [24,25,27]. Anatomical landmarks are used as positioning markers in the creation of the bone-fixator assembly.…”