A bone tissue phantom prototype allowing to test, in general, optical flowmeters at large interoptode spacings, such as laser-Doppler flowmetry or diffuse correlation spectroscopy, has been developed by 3D-stereolithography technique. It has been demonstrated that complex tissue vascular systems of any geometrical shape can be conceived. Absorption coefficient, reduced scattering coefficient an...

This paper presents non-uniform offsetting and biarcs fitting methods to speed up the part building process and increase the accuracy of built part for Rapid Prototyping (RP) processes. The non-uniform offsetting method is developed to build a hollowed object by finding correct offset contours of the Stereolithography (STL) models. Building a hollowed object instead of a solid part can signific...

Heterotopic ossification is a known complication of traumatic injuries. To minimize iatrogenic complications during excision, an understanding of anatomic relationships is essential. Current imaging modalities, such as computed tomography and plain radiographs, are limited to providing a 2-dimensional representation of a 3-dimensional problem. This study describes the benefits of 3-dimensional ...

Three dimensional printing, additive manufacturing or stereolithography as it was first described has recently come into vogue within the scientific community. Initially conceived in the 1980s by Charles Hull, it represents the successive addition of layers of various materials to form high definition three dimensional structures using Cartesian co-ordinates from 3D computer aided design (CAD) ...

Continuously increasing life expectancy results in a rising number of bone diseases and fractures. Replacements from natural sources are not only limited in their availability, they also have some serious disadvantages such as possible immunological reactions or transmission of diseases. New synthetic biodegradable materials based on photopolymers could be an alternative solution. In these inve...

In this paper, we present a robust and efficient technique for surface meshing based on Stereolithography (STL) surface definition. Ridges are correctly identified using checks on dihedral angle and comparisons of the ratio of triangle edge lengths. Robust edge swapping, splitting and contraction are performed with stringent element validity checks. The improved remeshing technique is applied d...

Micro-stereolithography ( SL) is capable of fabrication of highly complex three-dimensional (3D) microstructures by selectively photo-induced polymerization from the monomer resin. However, during the evaporative drying of structures from liquid resin, the 3D microstructures often collapse due to the capillary force. In this work, a theoretical model is developed to analyze the deflection and a...