tooth development

Question 1

teeth are derived from

Answer 1

primary epithelial band

Question 2

primary epithelial band gives rise to

Answer 2

1. dental lamina

2. vestibular lamina

Question 3

what supports the primary epi band

Answer 3

ectomesenchyme

Question 4

teeth come from

Answer 4

dental lamina

Question 5

space between cheek and teeth come from

Answer 5

vestibular lamina

Question 6

bud structure form on

Answer 6

dental lamina

Question 7

invasion of the epithelium into ectomesenchyme

Answer 7

bud stage

Question 8

histodifferentiation begins at what stage

Answer 8

cap stage

Question 9

what structures can you see during cap stage

Answer 9

1. enamel organ
2. dental papilla
3. dental follicle

Question 10

what forms the enamel of the tooth

Answer 10

enamel organ

Question 11

the condensed ectom cells become

Answer 11

dental papilla

Question 12

what forms the dentin and pulp

Answer 12

dental papilla

Question 13

what does the dental follicle do

Answer 13

limits dental papilla and surrounds dental organ

Question 14

supporting tissues of tooth come from

Answer 14

dental follicle

Question 15

layers from dental papilla inward during bell stage

Answer 15

dental papilla, inner enamel epi, stratum intermedium, stellate reticulum

Question 16

inner enamel epithelium is

Answer 16

columnar shaped cells

Question 17

what new structure is present at bell stage (region where IEE and OEE meet)

Answer 17

cervical loops

Question 18

cervical loops become what

Answer 18

roots

Question 19

is there hard tissue formation in bell stage

Answer 19

no

Question 20

what is in the center of the enamel organ

Answer 20

stellate reticulum

Question 21

what two structures make enamel

Answer 21

stratum intermedium and inner enamel epithelium

Question 22

separates enamel organ from dental papilla (acellular zone filled with collagen fibrils)

Answer 22

basal lamina

Question 23

where do the first secreted enamel matrix proteins accumulate

Answer 23

acellular zone

Question 24

what happens to dental lamina during bell stage

Answer 24

fragmentation

Question 25

acellular zone becomes

Answer 25

dentinoenamel junction

Question 26

inner enamel epi becomes

Answer 26

ameloblasts (enamel)

Question 27

dental papilla becomes

Answer 27

1. odontoblasts (dentin)
2. fibroblasts +
   undiff mesench cells (pulp)

Question 28

dental follicle becomes

Answer 28

cementoblasts (cementum), fibroblasts (PDL), osteoblasts (alveolar bone)

Question 29

what processes occur during crown stage

Answer 29

dentinogenesis and amelogenesis

Question 30

what causes elimination of the acellular zone

Answer 30

dentinogenesis

Question 31

cervical loop becomes

Answer 31

hertwig’s epithelial root sheath (HERS)

Question 32

what does Hertwig’s epi root sheath do

Answer 32

induce differentiation of odontoblasts from mesenchymal cells at periphery of pulp
*makes root dentin

Question 33

hertwig’s eventually becomes

Answer 33

epithelial cell rests of Malassez

Question 34

what connects the remnants of the dental lamina to the overlying oral mucosa

Answer 34

gubernacular cord

Question 35

what resorbs the bone over the erupting tooth and the roots of the deciduous tooth

Answer 35

osteoclasts, odontoclasts

Question 36

how does the tooth erupt

Answer 36

through the gubernacular canals