Ch 6 Part 1: Tooth Development And Eruption

Front 1

Action of one group of cells on another that leads to the establishment of the developmental pathway in the responding tissue.

Back 1

Induction

Front 2

Controlled cellular growth and accumulation of byproducts.

Back 2

Proliferation

Front 3

Change in identical embryonic cells to become distinct structurally and functionally

Back 3

Differentiation

Front 4

Development of specific tissue structure of differing form due to embryonic cell migration and inductive interactions.

Back 4

Morphogenesis

Front 5

Attainment of adult function and size due to proliferation, differentiation, and morphogenesis.

Back 5

Maturation

Front 6

Dentition

Back 6

natural teeth

Front 7

The two types of dentition are

Back 7

primary & permanent

Front 8

Develop during prenatal period and consists of 20 teeth.

Back 8

Primary Teeth

Front 9

Consists of 32 teeth that erupt and replace the primary teeth.

Back 9

Permanent Teeth

Front 10

A period of time when an individual has some teeth from both dentitions.

Back 10

Mixed Dentition Period

Front 11

Timeline where there IS movement between the two dentition.

Back 11

Mixed Dentition Period

Front 12

TIME PERIOD of in & out primary and permanent... NOT a retained baby tooth.

Back 12

Mixed Dentation PERIOD

Front 13

active exfoliation and eruption occurs in

Back 13

Mixed Dentation Period

Front 14

tooth development

Back 14

Odontogenisis

Front 15

genesis refers to

Back 15

development

Front 16

Odontogenisis begins between

Back 16

6th & 7th week

of prenatal development

Front 17

There is no clear cut beginning and end to stages of what?

Back 17

Odontogenesis

Front 18

The 6 stages of tooth development are:

Back 18

-Initiation

-Bud Stage

-Cap Stage

-Bell Stage

-Apposition Stage

-Maturation Stage.

Front 19

Physiological process(es) involved in the

Initiation stage:

Back 19

Induction

Front 20

Physiological process(es) involved in the

Bud Stage:

Back 20

Proliferation

Front 21

Physiological process(es) involved in the

Cap Stage:

Back 21

Proliferation

Differentiation

&

Morphogenesis

Front 22

Physiological process(es) involved in the

Bell Stage:

Back 22

Proliferation

Differentiaton

&

Morphogenesis

Front 23

Physiological processes(es) involved in the Appositional Stage:

Back 23

Induction

&

Proliferation

Front 24

Physiological process(es) involved in the Maturation Stage:

Back 24

Maturation

Front 25

The first stage of initiation involves the process of what?

Back 25

Induction

Front 26

An interaction between the embryological tissues.

Back 26

Induction

Front 27

In the beginning of the 6th week the stomodeum is lined by what?

Back 27

Ectoderm

Front 28

The outer portion of ectoderm gives rise to:

Back 28

Epithelium

Front 29

Beneath the oral epithelium, neural crest cells migrated to the mesenchyme of the ectoderm and have influenced the formation of what?

Back 29

Ectomesenchyme

Front 30

An acellular structure (white space) between the oral epithelium and the ectomesenchyme in the stomodeum.

Back 30

Basement Membrane

Front 31

During the later part of the 7th week in the initiation stage:

Back 31

The oral epithelium grows deeper into the ectomesenchyme.

Front 32

When the oral epithelium grows deeper into the ectomesenchyme it is creates what?

Back 32

The Dental Lamina

Front 33

In what stage does proliferation of the dental lamina and ectomesenchyme occur?

Back 33

Bud Stage

Front 34

Bud Stage begins in what week?

Back 34

8th

Front 35

Bud Stage is stage number ________ in tooth development?

Back 35

Two

Front 36

At the end of the proliferation process for the primary dentition, the future maxillary and mandibular arches with each have what?

Back 36

10 Buds

Front 37

In the Bud Stage does basement membrane still exist between the bud and growing ectomesenchyme?

Back 37

Yes

Front 38

Anything that is between epithelium and connective tissue is always what?

Back 38

Basement Membrane

Front 39

The predominate physiologic process of the cap stage is:

Back 39

Morphogenisis

Front 40

What is the third stage of tooth development?

Back 40

Cap Stage

Front 41

Cap stage occurs between what weeks?

Back 41

9th & 10th

Front 42

Not only does morphogenesis take place in the cap stage, but what other two physiological processes take place in the cap stage as well?

Back 42

Proliferation

&

Differentiation

Front 43

A depression results in the deepest part of each tooth bud forming what?

Back 43

The Cap or Enamel Organ

Front 44

what is another word for cap

Back 44

enamel organ

Front 45

In the future the enamel organ will

produce what?

Back 45

enamel

Front 46

The inside of the cap is where we

will have what?

Back 46

enamel

Front 47

condensed ectomesenchyme into a mass within the concavity of the enamel organ

is called?

Back 47

Dental Papilla

Front 48

The dental papilla will later produce what?

Back 48

dentin

&

pulp tissue

Front 49

The remaining ectomesenchyme surrounding the outside of the enamel organ

condenses into what?

Back 49

The Dental Sac

Front 50

The Dental Sac will produce what?

Back 50

Periodontium

Cementum

Periodontal Ligament

&

Alveolar Bone

Front 51

At the end of the cap stage we now have?

Back 51

Dental Organ

Dental Papila

&

Dental Sac

Front 52

The dental organ, dental papila, and dental sac together are called what?

Back 52

The Tooth Germ

Front 53

Primordium of the tooth is also known as what?

Back 53

Tooth Germ

Front 54

The tooth germ signals what?

Back 54

the tooth's future crown form

Front 55

THE CAP AND BELL STAGE BOTH LOOK VERRY SIMILAR

Back 55

BE CAREFUL WHEN DIFFERENTIATING THE TWO

Front 56

What is significant in the 10th week in the cap stage?

Back 56

The initiation stage is occurs again.

Front 57

In the 10th week during the cap stage for each primary tooth the initiation stage occurs for what reason?

Back 57

for the anterior teeth of the permanent dentition

Front 58

Each primordium for these initiallyformed permanent teeth appears as an extension of the dental lamina into theectomesenchyme-lingual to the developing primary tooth germs.

Back 58

theanterior teeth of the permanent dentition

Front 59

It is when each primordium for the anterior teeth of the permanent dentition appears as an extension of the dental lamina into the ectomesenchyme-lingual to the developing primary tooth germs.

Back 59

Successional dental Lamina

Front 60

teeth that replace primary teeth are

Back 60

succedaneous teeth

Front 61

teeth that do not replace primary teeth are

Back 61

nonsuccedaneous teeth

Front 62

The permanent molars are

Back 62

nonsuccedaneous

Front 63

permanent teeth formed with primary predecessors are called

Back 63

succedaneous

Front 64

the permanent tooth that succeeds a primary tooth is

Back 64

succedaneous

Front 65

The permanent succedaneous tooth's crown will erupt lingual to it's primary predecessor's roots if what?

Back 65

the primary tooth has not been fully shed or lost.

Front 66

What is the fourth stage of tooth development

Back 66

Bell Stage

Front 67

Bell stage takes place in what weeks

Back 67

11th and 12th week

Front 68

when does differentiation to its fullest extent occur

Back 68

in the Bell Stage

Front 69

differentiation in the bell stage results in what?

Back 69

4 different types of cell layers in the enamel organ

Front 70

In the Bell Stage cell types form layers and include***

Back 70

the inner enamel epithelium

outer enamel epithelium

stellate reticulum

&

stratum intermedium.

Front 71

What happens to the enamel organ in bell stage

Back 71

SR, IEE, OEE, and SI form

Front 72

IEE

Back 72

inner enamel epithelium

Front 73

OEE

Back 73

outer enamel epithelium

Front 74

SR

Back 74

stellate reticulum

Front 75

SI

Back 75

stratum intermedium

Front 76

What are the innermost, tall columnar cells of the enamel organ?

Back 76

The inner enamel epithelium

Front 77

reffering to cells on that are pink

Back 77

IEE

Front 78

reffering to purple cells on the outside

Back 78

OEE

Front 79

IEE will differentiate into

Back 79

ameloblasts that will form the enamel matrix

Front 80

What type of cells do IEE have

Back 80

tall columnar

Front 81

The OEE is what

Back 81

the outer cuboidal cells of the enamel organ

Front 82

OEE serves as what

Back 82

a protective barrier for the enamel organ

Front 83

IEE -> Pre ameloblast -> ameloblast -> enamel

Back 83

MEMORIZE THIS

Front 84

OEE -> protects enamel organ (security)

Back 84

MEMORIZE THIS

Front 85

What type of cels do OEE have

Back 85

cuboidal

Front 86

star shaped stuff that occurs inside the enamel organ

Back 86

stellate reticulum

Front 87

you can remember stellate reticulum bc it is star shaped

Back 87

Stellate sounds like stellar which can relate

to stars

Front 88

Stellate reticulum (SR) occurs between what

Back 88

IEE and OEE

Front 89

SR

Back 89

Occurs in many layers

Front 90

What cells form a network within the enamel organ

Back 90

SR

Front 91

What supports the production of enamel matrix

Back 91

SR

Front 92

Stratum intermedium (SI) occurs between what

Back 92

OEE and IEE

Front 93

A compressed layer of flat to cuboidal cells

Back 93

SI (stratum intermedium)

Front 94

How can you differentiate between the Cap stage and Bell Stage

Back 94

The bell stage will have many layers of cells

Front 95

Supports the production of enamel matrix

Back 95

SI

Front 96

O is

Back 96

Outer

Front 97

I is

Back 97

Inner

Front 98

The dental papilla has also undergone extensive differentiation and now consists of two types of tissues and layers. These layers are:

Back 98

The outer cells of the dental papilla and the central cells of the dental papilla

Front 99

Central cells of the dental papilla give rise to

Back 99

primordium of the pulp

Front 100

outer cells of dental papilla give rise to

Back 100

dentin-secreting cells

Front 101

dentin-secreting cells are also known as

Back 101

ondontoblasts

Front 102

Dentin sits next to

Back 102

enamel

Front 103

central cells make what

Back 103

pulp

Front 104

The initiation stage is between what weeks

Back 104

6th - 7th

Front 105

The bud stage takes place in what week

Back 105

8th

Front 106

The cap stage takes place in what weeks

Back 106

9th - 10th

Front 107

The bell stage takes place in what weeks

Back 107

11th - 12th