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Oral Bio > Enamel > Flashcards

Enamel Flashcards

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Biology 101 flashcards
1
Q

Calcification begins at _____

A

Cusp tips and moves down (incisal edges first)

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2
Q

Timing of calcification?

A

Long process

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3
Q

What promotes calcification?

A

Proteins- don’t worry about specific ones

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4
Q

Ealry maturation stage

A

loss of organic matter and water and influx of mineral salts

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5
Q

Know eruption sequences!

A
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6
Q

If a patient is missing a tooth which stage of development was disturbed? When?

A

Initiation- same for extra tooth

in utero-know when

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7
Q

Has an extra tooth? which stage

A

initiation-specifically bud stage

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8
Q

patient has a weird shaped tooth? (peg lateral)

A

Morphodifferentiation

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9
Q

If a patient has weird colored teeth, which stage?

A

Apposition-genetic

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10
Q

One tooth weird color?

A

Maybe calcification

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11
Q

Patient is 16 and tooth is impacted which stage is disturbed?

A

eruption

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12
Q

Hypodontia and Anodontia affects what (%)

A

primary teeth 0.1-.7%

Permanent 2-9%

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13
Q

Most likely to be missing

A

3rd molars > upper laterals > 2nd premolars > lower centrals

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14
Q

Syndromes with hypodontia

A

Ectodermal dysplasia and orofacial clefts

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15
Q

Dental anomalies with initiation

A

hypodontia and supernumerary

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16
Q

Anomalies with proliferation

A

gemination and fusion

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17
Q

Anomalies with Morphodifferentiation

A

Macrodontia, microdontia, dens in dente, dens evaginatus, talon cusp

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18
Q

Anomalies of aposition/calcification-with enamel

A

amelogenesis imperfecta, molar-incisor hypomineralization, fluorosis, tooth discoloration

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19
Q

anomalies of aposition and calcification of dentin

A

dentinogenesis imperfecta, dentinal dysplasia

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20
Q

Supernumerary teeth %’s

A

primary teeth .3-.8%

Permanent 1-3.5%

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21
Q

Supernumeray more common in which jaw? %?

A

Maxilla-98%

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22
Q

Mesiodens

A

supernumerary teeth in the midline

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23
Q

Shape of supernumerary teeth

A

normal or conical/tuberculate

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24
Q

Syndrom of supernumary

A

clediocranial dysplasia

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25
Q

cleidocranial dysplasia

A

a shit ton of extra teeth-commonly causes lots of impaction

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26
Q

Double tooth-two options

A

fusion or gemination

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27
Q

% of double teeth prim and perm

A

2.5% prim

.2% permanent

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28
Q

Fusion

A

joining of two tooth germs-usually two teeth of normal series-2 roots

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29
Q

number of roots in fusion

A

2

30
Q

number of teeth in mouth with fusion

A

normal - 1

31
Q

Gemination

A

two tooth buds from a single tooth germ-normal number of teeth-one root canal

32
Q

number of root canals in gemination

A

1-tooth number normal tho

33
Q

macrodontia

A

tooth larger than normal-NOT fusion or gemination

34
Q

Syndromes of Macrodontia

A

KBG syndrome, hemi facial hyperplasia

35
Q

% of macro dontia

A

1.1% in permanent

36
Q

Microdontia and %

A

Small tooth- 2.0% in perm

37
Q

Most common tooth of microdontia

A

max lat (peg) and 3rd molars

38
Q

Syndrome of microdontia

A

pituitary dwarfism

39
Q

Dens in dente

A

developmental invagination in the cingulum pit

40
Q

% of perm teeth with dens in dente

A

4.0%

41
Q

Most common tooth with dens in dente

A

max lat

42
Q

Dens evaginatus

A

tubercle projecting from the occlusal surface

43
Q

Commonality of dens evaginatus

A

~4%

44
Q

Dens evaginatus affects what race commonly

A

asian

45
Q

Most common tooth of dens evaginatus

A

premolars

46
Q

Asians most commonly have this defect

A

dens evaginatus

47
Q

Talon cusp and %

A

hornlike projection of the cingulum ~1-2%

48
Q

Most common tooth of talon cusp

A

max cent incisor

49
Q

Amelogenesis imperfecta

A

inherited defect of enamel

50
Q

Prevalence of amelogenesis imperfecta

A

1:14,000

51
Q

Teeth affected by amelogenesis

A

prim and perm

52
Q

Phenotypes of amelogenesis

A

slide 49

53
Q

hypoplastic

A

50

54
Q

Hypomaturation

A

insuficient removal of enamel proteins causing poor crystal quality causing normal thickness but soft and rough surface

55
Q

Phenotype of hypomaturation

A

yellow-brown friable enamel

enamel is rapidly lost by attrition and teeth are sensative

anterior open bite is infrequent

56
Q

Hypocalcified phenotype

A

insufficient calcification of enamel –> normal thickness but friable

57
Q

Visual of hypocalcified

A

yellow brown or orange brown

enamel lost by attrition-teeth sensative

ant open bite frequent!!!

Teeth acumulate calculus deposits

58
Q

Molar incisor hypomineralization and prevelance

A

localized opacity or breakdown in permanent molars and incisors—prevalence of 10% very high

59
Q

etiology of molar incisor hypomineralization

A

disturbance of tooth formation (i.e. high fever) between birth and 1st year

60
Q

MIH (molar incisor hypomin) enamel thickness and surface

A

normal thickness-smooth and white, brown or yellow

61
Q

boundary adj to normal enamel

A

distinct boundary

62
Q

breakdown in MIH?

A

may or may not be

63
Q

where is opacity in MIH?

A

incisal 1/3

64
Q

restoration in perm molars of MIH

A

atypical or extensive caries

65
Q

Enamel Hypoplasia

A

defect in quantity of enamel-caused by intitial failure of deposition of enamel protein or mineralization defect

66
Q

Enamel hypoplasia general or localized?

A

localized to one tooth

67
Q

Enamel hypoplasia is related with _____ of the primary dentition

A

dental trauma

68
Q

fluorosis

A

slide57

69
Q

tooth discoloration

A

59

70
Q

dentinogenesis imperfecta

A

61

71
Q

Dentinal dysplasia and prevalence

A

inherited defect of dentine-1:100,000-primary and perm

Oral Bio (9 decks)

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