tooth

Question 1

division of the tooth

Answer 1

• crown
• neck
• root

Question 2

what is the crown covered by?

Answer 2

enamel

Question 3

what is the enamel

Answer 3

• light brownish structure

- consists of prisms of calcium hydrovyapitite crystals

Question 4

how are the prisms in the enamel bound?

Answer 4

bound together by interprismatic material

Question 5

what happens during enamel growth?

Answer 5

changes in direction, which give the dark lines of retzius, passing from the dentino enamel junction

Question 6

what is the enamel devoid of?

Answer 6

collagen fibers

Question 7

what is the root covered by?

Answer 7

cementum

Question 8

what is cementum

Answer 8

thin, hard calcified substance, thicker around the apical part of the root and displays small lacunae from which give canaliculi

Question 9

what do lacunae and canliculu appear as?

Answer 9

appear black since the are filled with air in ground preparations

Question 10

what forms the main bulk of the tooth?

Answer 10

dentine

Question 11

what is dentine?

Answer 11

encloses the pulp cavity, consits of 70% calcium hydroxy apatite

Question 12

what are dentinal tubules?

Answer 12

long narrow canals extending from the dentino-enamel junction

Question 13

what occupy the dentinal tubules

Answer 13

tomes;s fibers which are long cytoplasmic processes of odontoblasts.

Question 14

what is the hyaline layer?

Answer 14

outermost part of the root dentine, also called granular layer of tomes