Abstract
Different from the existing tissue engineering strategies, rapid prototyping (RP) techniques aim to automatically produce complex organs directly from computer-aided design freeform models with high resolution and sophistication. Analogous to building a nuclear power plant, cell biology (especially, renewable stem cells), implantable biomaterials, tissue engineering, and single/double/four nozzle RP techniques currently enable researchers in the field to realize a part of the task of complex organ manufacturing. To achieve this multifaceted undertaking, a multi-nozzle rapid prototyping system which can simultaneously integrate an anti-suture vascular system, multiple cell types, and a cocktail of growth factors in a construct should be developed. This article reviews the pros and cons of the existing cell-laden RP techniques for complex organ manufacturing. It is hoped that with the comprehensive multidisciplinary efforts, the implants can virtually replace the functions of a solid internal organ, such as the liver, heart, and kidney.
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