Tooth Development Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Autocrine

A

Self regulated- cell releases something that acts on its own receptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

paracrine

A

cell talks to neighbor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

endocrine

A

release into the blood stream- talks to every one

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

intracrine

A

signalling molecule never leaves cell-acts on self

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

cell-matrix intereactions

A

dictate morphogenesis and differentiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Cranial neural crest derivatives

A

ganglia/ nerves, adrenal medulla, ectomesnchyme of bones and teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Primary Epithelial Bands

A

mark sites of jaws

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Six stages of crown development

A

1) Initiation- induction
2) Bud Stage- proliferation
3) Cap Stage- Proliferation, diff. morphogenesis
4) Bell Stage- P, d, m
5) Apposition Stage- Induction and proliferation
6) Maturation Stage- maturation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Bud Stage is precurser to

A

enamel organ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Dental epithelium

A

controls what is going to happen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Cap Stage

A

caused by unequal proliferation of bud cells
ectomesenchymal cells condense to become dental papilla and dental sac
tooth germ = enamel organ, dental papilla and dental sac
Successional dental lamina forms on lingual side of dental lamina ( will give rise to permanent tooth)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Enamel knot

A

signalling center. found at base of enamel organ inside the cap shape

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

dental papilla becomes

A

periodontia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

stellate reticulum

A

rich in GAGS

supports enamal production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

stratum intermedium

A

rich in alkaline posphatase,

supports enamel production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Bell stage

A

Continued differentiation produces 4 distinct layers

1) outer enamel epithelium
2) stellate reticulum
3) stratum intermedium
4) inner enamel epthelium

17
Q

Cervical loop

A

junction of OEE (outer enamel epithelium) and IEE

this causes the shape and size of roots

18
Q

Outer Enamel Epthelium

A

protective barrier for enamel organ

19
Q

Inner Enamel Epithelium

A

differentiate into ameloblasts- enamel forming cells

20
Q

Apposition Stage

A

organic matrix of enamel and dentin are laid down followed by initial calcification- causes series of reciprocal inductions

1) IEE cells differentiate into preameloblasts- cells become polarized
2) preameloblasts induce outer DP cells to differentiate into preodontoblasts which become odontoblasts.
3) odontoblasts take off and basement membrane disintegrates (DEJ is formed)
4) predentin stimulates preameloblasts to become ameloblasts and retreat. (secretions immediately calcify to 25% full mineralization)

21
Q

Ameloblast Life Cycle

A

1) IEE Cell
2) Preameloblast- cell reverses polarity
3) Initial Secretory ameloblast- no Tomes process- prismless enamel
4) secretory ameloblast- Tomes process- enamel prisms
5) smooth-ended maturation ameloblast- removal of protein and water
6) ruffled-ended maturation ameloblast- introduction of inorganic material
7) preotective ameloblast- enamel cuticle

22
Q

Maturation Stage

A

Dentin is mineralizes as it is deposited , globular dentin produced first, then fuse together.
mantle dentin is closest to DEJ (higher mienral content, collagen fibers perpendicular to DEJ)
remaining dentin is circumpulpal dentin (lower mineral content and collagen fibers parralel to DEJ)