3D printing, or solid freeform fabrication, applied to regenerative medicine 
brings technologies from several industries together to help solve unique 
challenges in both basic science and tissue engineering. By more finely 
organizing cells and supporting structures precisely in 3D space, we will gain 
critical knowledge of cell-cell communications and cell-environment 
interactions. As we increase the scale, we will move toward complex tissue and 
organ structures where several cell phenotypes will functionally and 
structurally interact, thus recapitulating the form and function of native 
tissues and organs.