Forming solid free-form fabrication

Cima LG, Cima MJ (1996) Tissue regeneration matrices by solid free form fabrication techniques. US Patent 5518680... 

First, a 3D stmcture is designed using CAD software. Data obtained from computerized tomography (CT) or magnetic resonance imaging (MRI) medical scans can be used to create a customized CAD model. This CAD model is then expressed in a series of cross-sectional layers. The complex scaffold architecture must be built using layer-by-layer (LBL) manufacturing processes known collectively as solid free-form fabrication (SFF). 

J.M. Tian, Y. Zhang, X.M. Guo, L.M. Dong, Preparation and characterization of hydroxyapatite suspensions for solid free form fabrication, Ceram Int., 28, 299-302 (2002). 

The selective laser sintering (SLS) process is also known as laser powder deposition (24). Laser deposition is a solid free-form fabrication method. There, a laser beam is used to melt an addition material to create a material track with approximately hemispherical cross section. 

Solid free form fabrication (SFF) Fusion deposition modeling 3D printed parts... 

Figure 6.49 Basic principle of solid free-form fabrication.

Moist granular ceramics produced by the common forming methods such as tape casting and extrusion must be dried prior to binder burnout and sintering. Drying is also a key step in solid free-form fabrication techniques that involve laya--by-layer deposition of colloidal suspensions. 

In this chapter we considered the common ceramic forming methods and briefly described the solid free-form fabrication routes applicable to ceramics. Powder consolidation forms the last major processing step prior to the sintering process in which the microstructure of the final article is developed. Heterogeneities present in the green body cannot be easily removed during sintering, so control of... 

Calvert, P, and Crockett, R. (1997). Chemical solid free-form fabrication making shapes without molds, Chem. Mater. 9,650-663. 

Wu B M, Borland S W, Giordano R A, Cima L G, Sachs E M and Cima M J, Solid free-form fabrication of drug delivery devices , J. Controlled Release, 1996,40,77-87. 

Schek, R. M., Taboas, J. M., Segvich, S. J., Hollister, S. J., Krebsbach, P. H. 2004. Engineered osteochondral grafts using biphasic composite solid free-form fabricated scaffolds. Tissue Eng 10(9-10) 1376-85. 

Taboas J, Maddox R, Krebsbach P, Hollister S. Indirect solid free form fabrication of local and global porous, biomimetic and composite 3D polymer-ceramic scaffolds. Biomaterials 2003 24 181-94. 

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