Odontoblasts are one of the most important cells in tooth development. The key of obtaining tissue engineered dentin is to seek stable resource of seeding cells that can differentiate into odontoblasts. It is thought that tooth germs, dental papilla, dental pulp, and even pulp of exfoliated deciduous teeth have precursor cells which can form tooth. This is a review of the recent research progress in seeding cells of tissue engineered dentin.
