Abstract
A wide range of rapid prototyping (RP) techniques for the construction of three-dimensional (3-D) scaffolds for tissue engineering has been recently developed. In this study, we report and compare two methods for the fabrication of poly-(ε-caprolactone) and poly- (ε-caprolactone)–poly-(oxyethylene)–poly-(ε-caprolactone) copolymer scaffolds. The first technique is based on the use of a microsyringe and a computer-controlled three-axis micropositioner, which regulates motor speed and position. Polymer solutions are extruded through the needle of the microsyringe by the application of a constant pressure of 10–300 mm Hg, resulting in controlled polymer deposition of 5–600 μm lateral dimensions. The second method utilises the heating energy of a laser beam to sinter polymer microparticles according to computer-guided geometries. Materials may be fed either as dry powder or slurry of microparticles. Both powder granulometry and laser working parameters influence resolution (generally 300 μm×700 μm), accuracy of sintering and surface and bulk properties of the final structures. The two RP methods allow the fabrication of 3-D scaffolds with a controlled architecture, providing a powerful means to study cell response to an environment similar to that found in vivo.
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Ciardelli, G., Chiono, V., Cristallini, C. et al. Innovative tissue engineering structures through advanced manufacturing technologies. Journal of Materials Science: Materials in Medicine 15, 305–310 (2004). https://doi.org/10.1023/B:JMSM.0000021092.03087.d4
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DOI: https://doi.org/10.1023/B:JMSM.0000021092.03087.d4