| A | B |
|---|
| Enamel rods | enamel prisms, run from the DEJ to the enamel surface |
| Dentinoenamel junction | enamel & dentin meet within the tooth |
| enamel lamellae | cracks or imperfections in enamel |
| Striae of Retzius | stripes visible in enamel that represent where enamel forming cells paused |
| Hunter-Schreger Bands | dark & light areas visible when light shines through thin slices of enamel |
| Neonatal line | dark line in enamel or dentin that indicates enamel or dentin that was formed before and after birth |
| Enamel Spindles | ends of odontoblastic processes (tails) that extend into enamel; found in the inner 1/3 of enamel |
| Enamel tufts | hypocalcified areas of enamel in the inner 1/3 of enamel |
| Dentinal tubules | long tubes or tunnels found within dentin; contain the odontoblastic processes |
| Dentinal fluid | fluid found within dentinal tubules |
| Odontoblastic processes | tail of the odontoblast (dentin forming cell) |
| Predentin | nonmineralized, gelatin-like dentin closest to the odontoblasts |
| Peritubular dentin | dentin immediately surrounding the dentinal tubules |
| Intertubular dentin | dentin between the dentinal tubules |
| Mantle dentin | outermost layer of dentin that covers the circumpulpal dentin like the candy coating that covers an M&M |
| Circumpulpal dentin | dentin that is around the pulp |
| Primary dentin | formed while the tooth is still forming & before the tooth shape is completed |
| Secondary dentin | dentin formed after the completion of the root (tooth is fully formed) |
| Tertiary or Reparative dentin | dentin that forms in response to trauma |
| Contour Lines of Owen | lines that can be seen microscopically in dentin that indicate when the dentin forming cells paused |
| Tome's Granular Layer | granular area observed under the microscope in the root dentin near the DCJ |
| Odontoblastic Layer in Pulp | microscopic zone along the outer wall of the dental pulp that contains odontoblasts |
| Cell-free Zone | area in pulp next to the odontoblastic layer |
| Cell-rich Zone | area within dental pulp that is close to the pulp center & contains many cells |
| Pulp Core | innermost portion of dental pulp that contains many cells & is very vascular |
| Cementum | bone-like covering of the root of the tooth; 50-65% mineralized |
| Mineralization of enamel | 96-97% |
| Mineralization of dentin | 70% |
| Globular Dentin | dentin that has undergone both primary & secondary mineralization |
| Interglobular Dentin | dentin that has undergone primary mineralization only; less mineralized than globular dentin |
