Enamel And Dentine Flashcards
what is the tomes process
The secretory ameloblasts form this from the apical membrane with a proximal portion and a distal portion
Proximal - interrod enamel
Distal - rod enamel
What direction do the enamel rods take on
Right angles to the dentino-enamel junction and the tooth surface
What is the rods sheath
A distinct thin layer peripheral to the rods
Different refractive index stains darker and is more acid resistant than rods
Less calcified and contains more organic substance like enamel protein
What is the inter rod cement
Rods are cemented together by this substance which the crystals are arranged in a different direction in the inter rod region
What is perikymata
The growth lines become apparent on the surface of enamel as ridges known as this
What are the spindles
The termination of the dentinal tubules in enamel
What are the tufts
Hyocalcified zones caused by the bending of adjacent groups of rods
What is the neonatal line
It appears due to abrupt change in the environment and nutrition of the newborn - it is an accentuated incremental line of retzius
