Photocrosslinkable Materials for the Fabrication of Tissue-Engineered Constructs by Stereolithography - Tissue Engineering: Computer Modeling, Biofabrication and Cell Behavior - page 165

Fig. 17 ( A ) Macroscopic image of the structures built by stereolithography in the equilibrium
water swollen state and after drying. ( B ) Micro-CT image of the structure in water swollen state
[ 93 ]
Fig. 18
Stereo-thermal-lithography
system
XLG) at different concentrations (2.5 and 5 wt %). Unconfined compression tests
were performed regarding the swollen hydrogels, showing that an increasing on
the concentration of the Laponite nanoclay improved the compressive modulus.
Scaffolds with a gyroid pore network architecture, obtained by stereolithography,
showed an interconnected pore network (Fig. 17 ). In another work, bioactive glass
S53P4, an inorganic material with the ability to interact with bone tissue, was com-
bined with a methacrylated PCL polymer to produce porous scaffolds [ 34 ]. Bioac-
tive glass was homogeneously distributed through the scaffold and its surface, im-
proving the compression modulus of the construct and the cellular activity of the
seeded fibroblasts.
Figure 18 illustrates a mask-based multi-photon and multi-material stereolitho-
graphic system. This system, called Stereo-thermal-lithography (STLG), uses a mer-
cury lamp of 350 W as a light source. Appropriated filters split the radiation into two
different wavelengths: UV radiation and near-infrared (near-IR) radiation. Optical