Tissue engineering now plays an important role in the replacement, repair, maintenance, or enhancement of tissue function. The tissue engineering relates to the use of a “scaffold” combining with cells and biologically active molecules into functional tissues. The goal of tissue engineering is to generate new viable tissue by assembling functional constructs that are suitable for tissue formation. Many biomaterials have been applied to produce a scaffold which is an artificial structure that acts as a template for tissue formation and also as an optimum microenvironment for cell attachment, migration, proliferation and differentiation. The harvested cells attach onto the scaffold, so that it will migrate, multiply, grow and develop into tissue. In order to provide the proper microenvironment for the cells, the scaffold must be biocompatible and non-toxic with the cells. It must be biodegradable and have suitable mechanical strength, surface chemistry and high porosity.
