| Enamel and dentine defects of genetic origin are rare but are occasionally severe and may take a variety of forms and vary in their inheritance. |
| The bulk of the tooth consists of the bony substance dentine, surrounding the soft inner pulp that contains blood vessels and nerves. |
| If the sensitive dentine of the root is exposed, the tooth can become sensitive. |
| Collagen also constitutes the tough, elastic fabric of tendons and ligaments, and the reinforcing dentine of tooth. |
| The blobs correspond to vacuities in the dentine and are probably due to calcite or some other post-mortem infilling. |
| This dentine is darker than enamel, so teeth appear stained and discoloured. |
