Hypocalcified Structures Of Enamel

Hypocalcified Structures Of Enamel

Hypocalcified structures of enamel
Answer:

1. Enamel lamellae
   • They extend for varying depths from the enamel surface
   • They are thin, leaf-like structures filled with organic material
   • They may develop in planes of tension
   • Types:
2. Type A
   • Consist of poorly calcified rod segments
   • Restricted to enamel
3. Type B
   • Consist of degenerated cells
   • They are restricted to the dentin
4. Type C
   • These fare lamellae arising in erupted teeth
   • They are restricted to the dentin
5. Enamel tufts
   • Enamel tufts are tuft structures arising from dentin-enamel junction towards the enamel surface
6. Enamel spindles
   • They are mesenchymal in origin.
   • They are formed by extensions of odontoblast processes into enamel before calcification.
7. Surface structures
   • Perikymata
     • The small ridges and perikymata seen on the surfaces of canines are a result of normal development.
     • They are shallow furrows on the enamel surfaces where the striae of Retzius end.
   • Rod ends
     • They are concave and vary in depth and shape
   • Cracks
     • They are narrow, fissure-like structures that are seen on almost all surfaces