Stem cell research is being pursued in the hope of achieving major medical breakthroughs which are aimed at determining the mechanisms underlying the conversion of a single, undifferentiated cell, i.e, the fertilized egg, into the different cells comprising the organs and tissues of the human body. Stem cell is a multipotent cell, which can proliferate and differentiate into a specific cell. They are used for engineering many tissues and organs. These can be harvested from dental pulp, periodontal ligament, alveolar bone marrow, expanded, embedded in a appropriate scaffold, and transplanted...