Physiology Of Teeth

Question 1

-Most calcified and brittle substance in human body
-yellow to grayish white
-semi translucent

Answer 1

Enamel

Question 2

Enamel Inorganic and organic material?

Answer 2

96-98% inorganic
2-4% organic

Question 3

-Incremental growth of enamel
-marks primary calcification of enamel

Answer 3

Incremental line of retzius

Question 4

Represent line of retries as they meet at the surface of enamel

Answer 4

Perikymata

Question 5

More pronounce incremental lines

Answer 5

Neonatal lines

Question 6

-crosses band of retzius
-appositional growth of enamel 4um/day

Answer 6

Transverse striation

Question 7

Alternate light and dark bands

Answer 7

Hunter schreir bands

Question 8

-Originate from DEJ
-lateral spread of caries

Answer 8

Enamel tufts

Question 9

Cracks on surface of enamel
Pathway for bacteria to penetrate the enamel

Answer 9

Enamel lamellae

Question 10

-Extension of dentinal tubules that penetrates DEJ
-DEJ hypersensitivty

Answer 10

Enamel spindles

Question 11

-scalloped for attachement

Answer 11

Dentino- enamel juncton

Question 12

Mutation of FAM83H Gene

Answer 12

Amelogenesis imperfecta

Question 13

Deficiency in quantity

Answer 13

Enamel hypoplasia

Question 14

Deficiency in quality

Answer 14

Enamel hypocalcification

Question 15

-Bult of the tooth
-yellowish intrinsic color
-provides flexibility

Answer 15

Dentin

Question 16

Dentin Inorganic and organic material?

Answer 16

70% inorganic
Hydroxyapatite crystal
30% organic
Collagen type1

Question 17

Covers dentinal tubules

Answer 17

Peritubular dentin

Question 18

Main bulk locate between tubules

Answer 18

Intertubular dentin

Question 19

Extension of odontoblst

Answer 19

Odontoblastic process

Question 20

Contains dentinal fluid

Answer 20

Periodontoblastic space

Question 21

From plexus of raschkow

Answer 21

Intertubular nerve

Question 22

From plexus of raschow

Answer 22

Intertubular nerve

Question 23

From plexus of raschow

Answer 23

Intertubular nerve

Question 24

Secretory activity of dentin

Answer 24

Incremental lines of von ebner

Question 25

Accentuation of growth lines

Answer 25

Contour lines of owen

Question 26

Non fusion of globules of calospherits

Answer 26

Interglobular dentin

Question 27

Looping of terminal tubules

Answer 27

Granular layer of tomes

Question 28

-from ontogenesis until apical foramen formation

Answer 28

Primary dentin

Question 29

First layer,outer layer parallel to DEJ

Answer 29

Mantle dentin

Question 30

Bulk of dentin mass,surrounds the pulp chamber

Answer 30

Circumpubertal dentin

Question 31

Slower deposition after root formation has completed

Answer 31

Secondary dentin

Question 32

Formed in response to outside or noxious stimuli

Answer 32

Tertiary dentin

Question 33

From existing odontoblast

Answer 33

Reactionary dentin

Question 34

-new layer of dentin formed -found in pulp

Answer 34

Predentin/dentinoid