An<unk>  is a biological cell of neural crest origin that is part of the outer surface of the dental pulp, and whose biological function is dentinogenesis, which is the creation of dentin, the substance under the tooth enamel.  The<unk> s secrete dentin throughout life, which may be an attempt to compensate for natural wearing down of the enamel.  In the case of an infection breaching the tooth to the pulp and killing<unk> s, Periodontal Ligament Stem Cells may differentiate into<unk> s which would then secrete reparative dentin.
The biological tissue formed by<unk> s is a type of hard tissue.
Odontoblast
Trophoblast
Immunoblast
Ameloblast
Chondroblast
Mesoderm
Osteoblast
Mesenchymal stem cell