Quiz 11- Histo Part 1

Front 1

Stages in order

Back 1

bud, cap, bell, apposition, maturation

Front 2

Medial nasal prominences

Back 2

give rise to the lip

Front 3

2 maxillary segments + intermaxillary segment gives rise to

Back 3

upper jaw

Front 4

Tooth develops from (embryological derivatives)

Back 4

ectoderm and ectomesenchyme (neural crest)

Front 5

Epithelial band

Back 5

part of the initiation stage- result of mitosis and change of orientation of mitotic cells

gives rise to dental lamina and vestibular lamina

Front 6

Dental lamina gives rise to..

Back 6

gives rise to the tooth buds

Front 7

Ectomesenchyme around the dental lamina gives rise to...

Back 7

dental papilla

Front 8

FGF-8

Back 8

found in ectoderm where teeth develop- secreted from the first arch ectoderm; induces ectomesenchyme

Front 9

PAX-9

Back 9

found in ectomesenchyme where teeth develop

Front 10

Ectomesenchyme is made up of

Back 10

neural crest cells

Front 11

Tooth germ includes

Back 11

enamel organ, dental papilla, dental sac

(the ectoderm that forms the dental lamina forms the enamel organ)

Front 12

Enamel organ consists of

Back 12

outer enamel epithelium, stellate reticulum, inner enamel epithelium

Enamel organ has GAGs that draws in water

Front 13

Early tooth development is influenced by the ______, later tooth development is influenced by the ______

Back 13

ectoderm, ectomesenchyme

Front 14

inner enamel epithelium will differentiate into

Back 14

ameloblasts (enamel)

Front 15

outer cells of dental papilla will differentiate into

Back 15

odontoblasts (dentin)

Front 16

Central cells of dental papilla will differentiate into

Back 16

pulp tissue

Front 17

Bell stage

Back 17

stage of differentiation- assumes final shape

Front 18

Apposition stage aka

Back 18

secretory stage

Front 19

odontoblasts secrete ____ the preameloblasts

Back 19

toward

begin to secrete pre-dentin in the appositional stage

Front 20

Predentin

Back 20

requires for preameloblasts to become ameloblasts- only then do they secrete enamel

Front 21

Cervical loop aka

Back 21

hertwigs root sheath

Front 22

Cementum formation

Back 22

cells of the dental sac contact the dental root and become cementoblasts

Front 23

Permanent tooth formation

Back 23

comes from successional lamina which comes from dental lamina- gives rise to permanent incisors canines and premolars

Front 24

Cervical loop

Back 24

the inner cells of hertwigs root sheath gives rise to root- IEE cells induce odontoblasts to form from dental papilla; form the dentin of the root

Front 25

Cell rests of Malassez

Back 25

found in root sheath- can be activated in periodontal repair

Front 26

Amelogenesis (formation of enamel) occurs

Back 26

during the appositional stage

most protein deposited in the secretory stage and most mineral deposited in the late maturation stag

Front 27

papillary layer in amelogenesis is formed by

Back 27

fusion of OEE, stellate intermedium and stellate reticulum

Front 28

During the differentiation stage of amelogenesis

Back 28

ameloblasts secrete enamel

Front 29

Tome's processes

Back 29

enamel projections that are laid down by ameloblasts

gives rise to interrod (first) and rod (second) enamel

found in between Ameloblasts and enamel

Front 30

During maturation stage of amelogenesis, the ruffled border of the ameloblasts...

Back 30

adds inorganic material

transition to ruffled ameloblasts means apoptosis

Front 31

During maturation stage of amelogenesis, the smooth border of the ameloblasts...

Back 31

removes water and organic material

Front 32

Modulation

Back 32

ruffled border to smooth border

Front 33

Ruffled ameloblasts

Back 33

produce bicarb, alkalizes the enamel to prevent reverse demineralization

Front 34

protective stage

Back 34

basal lamina is secreted

hemidesmosomes form with ameloblasts

Front 35

Enamel proteins

Back 35

amelogenins and nonamelogenins

Front 36

nonamelogenins include

Back 36

ameloblastin, enamelin, tuftelin,

Front 37

stria of retzius

Back 37

incremental growth lines in enamel

weekly

Front 38

cross striations

Back 38

daily changes in enamel

Front 39

Gnarled enamel

Back 39

area where the enamel twists- allows for stress in enamel

Front 40

DEJ

Back 40

scalloped shaped

Front 41

Enamel tufts vs enamel lamella

Back 41

tufts- changes in rods at the DEJ

lamella- run to the surface of the enamel

Front 42

Enamel spindles

Back 42

odontoblastic processes that have moved into the enamel