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Dental Assisting > CH. 8 Oral embryology and histology > Flashcards

CH. 8 Oral embryology and histology Flashcards

1
Q

Embryology

A

Study of prenatal development through the stages of birth

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2
Q

Histology

A

Study of structure and function of tissues

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3
Q

Three periods of prenatal development

A
  1. preimplantation
    2.embryonic
    3.Fetal
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4
Q

Most critical stage of prenatal development and why

A

Embryonic. The stage where all major structures in the body begin to form

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5
Q

When does preimplantation occur

A

Beginning of the 2nd week to the 8th week

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6
Q

When does the fetal period occur

A

From the 9th week until birth

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7
Q

The THREE primary embryonic layers

A

1.ectoderm (outer layer)
2.mesoderm (middle layer)
3. Endoderm (inner layer)

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8
Q

Antibiotic a pregnant woman should not take and what does it cause

A

Tetracycline. It causes stain to the babies teeth.

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9
Q

What can developmental disturbances be caused by?

A

Environmental and genetic factors

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10
Q

When does facial development occur?

A

Between the 5th and 8th week

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11
Q

When does the first sign of tooth development occur?

A

when the embryo is 5-6 weeks old

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12
Q

When are all primary teeth developed?

A

17th week

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13
Q

Teratogens

A

Adverse environmental influences that cause birth defects (drugs, alcohol, exposure to xray)

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14
Q

Resorption

A

Removal/dissolving of bone

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15
Q

Deposition

A

process of adding new bone

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16
Q

Osteoblasts

A

cells responsible for new bone formation

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17
Q

Osteoclasts

A

cells responsible for the process of removing bone

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18
Q

Anodontia

A

Absence of one or more teeth

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19
Q

Supernumery teeth

A

Development of extra teeth

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20
Q

Macrodontia

A

Abnormally large teeth

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21
Q

Microdontia

A

Abnormally small teeth

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22
Q

Dens in dente

A

A tooth that grows into another tooh

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23
Q

Germination

A

when a single bud splits and forms two teeth

when two teeth develop from one tooth bud

when tooth germ try to divide

24
Q

Fusion

A

Two teeth fusing together. The union of two adjacent tooth germs

25
Q

Concrescence

A

Union of roots of TWO or MORE teeth

26
Q

odontogenosis

A

process of TOOTH FORMATION

27
Q

Three stages of teeth formation

A

Growth
Calcification
Eruption

28
Q

Three stages of growth period

A

Bud
Cap
Bell

29
Q

Name for permanent (adult) teeth

A

Succedanous teeth

30
Q

Ameloblasts

A

Enamel forming cells

31
Q

Odontoblasts

A

Dentin forming cells

32
Q

Cementoblasts

A

cementum forming cells

33
Q

Eruption

A

Movement of the tooth into its functional postition in the oral cavity

34
Q

Shedding

A

Process in which primary teeth are replaced with succedanous teeth (permanent teeh)

35
Q

Enamel

A

Cover of the crown

36
Q

What is enamel made out of?

A

Hydroxyapatite (calcium and phosphorus)

37
Q

What is dentin made out of

A

Dental tubules (a fluid which contains dental fibre. this makes dentin a live tissue)

38
Q

What is cementum

A

Cover of the root

bonelike, rigid connective tissue

39
Q

What is pulp

A

Centre part of the tooth made of nerves ,blood vessels and cells.

is a live tissue
keeps tissue supplied with nutrients and moisture

40
Q

TRUE OR FALSE
Each tooth has ONE crown and one or more roots

A

TRUE

41
Q

Term for gums

A

Gingiva

42
Q

What is the CEJ and what does it stand for

A

The cej is where the crown and the root meet.
cementoenamel junction,

43
Q

Anatomical crown

A

all of the tooth that is covered with the enamel (the whole crown)

44
Q

Clinical Crown

A

Portion of enamel that is visible in the mouth above the gumline

45
Q

Bifurcation

A

division into two roots

46
Q

trifurcation

A

division into THREE roots

47
Q

Mandible

A

Lower jaw

48
Q

Maxilla

A

Upper jaw

49
Q

Alveolar process

A

the structure that holds the roots of your teeth in place.

The bony space occupied by the tooth and periodontal ligamen

50
Q

Lamina dura (cribform plate)

A

thin compact bone that lines the alveolar socket

51
Q

Oral muscosa

A

Lining of the oral cavity

52
Q

The THREE types of oral mucosa

A

1.Lining (soft. thin)
2.Masticatory (thicker, harder)
3.Specialized mucosa (The mucous membrane found in the regions of the taste buds)

53
Q

What does the lining mucosa cover

A

Inside of cheeks. lips. under tongue, soft palate)

54
Q

What does the masticatory mucosa cover?

A

The attached gingiva
hard palate
dorsum (upper surface of tongue

55
Q

Dorsum

A

Upper surface of tounge

56
Q

Ventral surface

A

underside of tongue

Dental Assisting (52 decks)

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