510-9

Question 0

crown

Answer 0

anatomically- covered with enamel

clinically- exposed

Question 1

2 functions of teeth

Answer 1

digestion, communication

Question 2

PDL

Answer 2

connects cementum to alveolar bone

Question 3

enamel

Answer 3

96% mineral
hardest tissue in the body
translucent
non living in adults
slightly porous

Question 4

dentin

Answer 4

70% mineral
2nd hardest tissue in the body
alive in adult

Question 5

pulp

Answer 5

vascular and innervated

Question 6

cementum

Answer 6

living, bone-like material

45-60% mineral

Question 7

apatites

Answer 7

calcium phosphate crystals that make up enamel
combine with Cl, Fl, OH
HYDROXYAPATITE most common

Question 8

Floridation

Answer 8

when Fl is incorporated in apatite

Question 9

fluorosis

Answer 9

when too much Fl is incorporated into apatite crystal and the enamel has a mottled appearance

Question 10

enamel rods

Answer 10

hydroxyapatite crystals in enamel arranged by amelogenins

Question 11

amyloblasts

Answer 11

produce enamel

Question 12

enamel etching

Answer 12

enamel etched with acid to allow bonding agent to stick to the tooth (type I, type II, type III)

Question 13

meth mouth

Answer 13

loss of enamel

Question 14

dentinoenamel junction

Answer 14

where dentin meets enamel (not smooth but scalloped to withstand shearing)

Question 15

3 types of microscopic enamel imperfections

Answer 15

1. ) lamellae- spans whole enamel (organic material)
2. ) tufts- spans a short section of enamel (enamel proteins)
3. ) spindles- odontoblast processes stuck in enamel

Question 16

odontoblasts

Answer 16

secrete cells of the dentin remain attached to the DEJ by processes

Question 17

peritubular dentin

Answer 17

mineralized dentin immediately surrounding the odontoblast process

Question 18

intertubular dentin

Answer 18

dentin in between tubulues

Question 19

predentin

Answer 19

unmineralized dentin (newly deposited)

Question 20

primary dentin

Answer 20

makes up most of the dentin (mineralized predentin)

Question 21

secondary dentin

Answer 21

deposited once roots form and slowly shrink the pulp cavity

Question 22

tertiary dentin

Answer 22

used locally for repairs
REACTIONARY- produced by existing odontoblasts
REPARATIVE- produced by newly differentiated odontoblasts

Question 23

mantle dentin

Answer 23

dentil deposited under the enamel

Question 24

dead dentinal tracts

Answer 24

dead odontoblastic processes that can’t be repaired

Question 25

Nerve Plexus of Raschkow

Answer 25

nerves that loop from the pulp into the predentin

Question 26

3 proposed mechanisms of dentin sensitivity

Answer 26

1. ) direct innervation of dentin
2. ) odontoblasts act as receptors
3. ) tubular nature of dentin allows for fluid movement

Question 27

cementum

Answer 27

living, bone like structure between the root and the PDL

45-60% mineral

Question 28

cementoblasts

Answer 28

produce cementum and become encased in cementum and become CEMENTOCYSTS

Question 29

2 main types of cementum

Answer 29

1. ) acellular- no cells present cuz located by PDL, functions in anchoring, found in cervical region of tooth
2. ) cellular- mobility, cells dispersed throughout, located low on roots

Question 30

4 zones of the pulp

Answer 30

1. ) odontoblast
2. ) cell free
3. ) cell rich
4. ) pulp core