Development Of Tooth And Supportin Tissues

Question 1

Continuous horseshoe-band of thickened epithelium in the location of upper and lower jaws

Answer 1

Primary epithelial band

Question 2

Thickening of the oral epithelium adjacent to condensation of ectomesenchyme

Answer 2

Dental lamina

Question 3

2 subdivisions of primary epithelial band

Answer 3

Dental lamina

Vestibular lamina

Question 4

How many stages are there in tooth development?

Answer 4

3 stages

Question 5

Characterized by rounded, localized growth of epithelium surrounded by proliferating mesenchymal cells, which are packed closely beneath and around the epithelial buds

Answer 5

Bud stage

Question 6

Condensation of the ectomesenchyme immediately subjacent to the tooth bud

Answer 6

Cap stage

Question 7

It will eventually form the enamel

Answer 7

Enamel organ

Question 8

Ball of condensed ectomesenchymal cells (it will form the dentin and pulp)

Answer 8

Dental papilla

Question 9

This give rise to cementum and the periodontal ligament

Answer 9

Dental follicle or dental sac

Question 10

Extension from the dental lamina that id connected to enamel organ

Answer 10

Lateral lamina

Question 11

It is an artifact produced during sectioning of tissue

Answer 11

Enamel niche

Question 12

Densely packed accumulation of cells projecting from the inner enamel epithelium into dental papilla

Answer 12

Enamel knot

Question 13

Term used to constitute the structure that has enamel organ, dental papilla and dental follicle

Answer 13

Dental organ or tooth germ

Question 14

Cluster of non dividing epithelial cells visible im section of molar cap stage

Answer 14

Enamel knot

Question 15

First noted by expression of p21 gene expression

Answer 15

Enamel knot precursor cells

Question 16

Temporary structures that disappear before enamel formation begins

Answer 16

Enamel knot or enamel cord

Question 17

Stage where the enamel organ resembles a bell with deepening of the epithelium over dental papilla

Answer 17

Bell stage

Question 18

Initiation of tooth development begins at?

Answer 18

37 days

Question 19

Determination of specific tooth types at their correct position of jaws

Answer 19

Patterning

Question 20

Teeth are all the same type

Answer 20

Homodont

Question 21

Teeth have different shapes or forms

Answer 21

Heterodont

Question 22

Packed closely beneath and around the epithelial bud

Answer 22

Supporting ectomesenchymal cells

Question 23

Connection between the lateral lamina and developing tooth

Answer 23

Lateral lamina

Question 24

A mass of similar epithelial cells transforms itself into morphologically and functionally distinct components

Answer 24

Period of histodifferentiation

Question 25

Pulls water into the enamel organ

Answer 25

Glycosaminoglygan

Question 26

Central part of the enamel organ

Answer 26

Stellate reticulum

Question 27

The tooth crown assumes its final shape

Answer 27

Morphodifferentiation

Question 28

Cells that will be making the hard tissues (ameloblast & odontoblasts) of the crown acquire their distinctive phenotype

Answer 28

Histodifferentiation

Question 29

Cells at the periphery of enamel organ assume a low cuboidal shape

Answer 29

Outer enamel epithelium

Question 30

Cells bordering on the dental papilla assume shorter columnar shape

Answer 30

Inner enamel epithelium

Question 31

Where IEE and OEE meet at the rim of enamel organ

Answer 31

Zone of reflexion or cervical loop

Question 32

Cells between IEE and Stellate Reticulum

Answer 32

Stratum Intermedium

Question 33

Discrete cluster of epithelial cells that results from the fragmentation of the dental lamina

Answer 33

Epithelial pearls

Question 34

Pioneer nerve fibers approach the developing tooth

Answer 34

Bud-to-cap stage

Question 35

Target of the nerve fibers

Answer 35

Dental follicle

Question 36

Nerve fibers penetrate the dental papilla

Answer 36

Dentinogenesis

Question 37

Absent in the pioneer nerve fibers approaching the tooth germ

Answer 37

Autonomic nerve fibers

Question 38

Permanent teeth arise from the??

Answer 38

Dental lamina

Question 39

Embryonic development of entire primary dentition

Answer 39

6-8 weeks in utero

Question 40

Successional permanent teeth

Answer 40

Week 20 - 10 mos after birth

Question 41

Permanent molars

Answer 41

Week 20 - 5 years of age

Question 42

How many enlargement or knobs will appear?

Answer 42

20

Question 43

Inner enamel epithelium will later differentiate into?

Answer 43

Ameloblast

Question 44

The peripheral cells of the mesenchymal dental papilla differentiate into?

Answer 44

Odontoblast

Question 45

The basement membrane that separates the enamel organ and the dental papilla just prior to dentin formation is called?

Answer 45

Membrana preformativa

Question 46

It will give rise to the epithelium for the root formation

Answer 46

Cervical loop

Question 47

Pattern of enamel knot that extends between the inner and outer dental epithelium

Answer 47

Enamel cord

Question 48

Hard tissue starts at what stage?

Answer 48

Late stage of bell stage