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Oral Anatomy > Anomalies > Flashcards

Anomalies Flashcards

1
Q

Total Anodontia

A

Never had any teeth

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2
Q

Partial Anodontia

A

Never having one or more teeth

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3
Q

Partial Anodontia-Most commonly missing perm. teeth

A

1) Third molars (especially maxillary)
2) Max LI (1-2%)
3) Mand 2P (1%)

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4
Q

Partial Anodontia-Most commonly missing primary teeth

A

Mand CI

*Perm Mand CI can be mising too

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5
Q

When/where do extra or supernumerary teeth occur

A

Maxillary and permanent dentition

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6
Q

Mesiodens

A

Supernumerary tooth between Max CI

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7
Q

Extra molars may be called

A

paramolar, distomolar, or fourth molar

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8
Q

T o F: Supernumerary teeth will lead to an excessive number of teeth

A

False, may just replace a different tooth

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9
Q

What teeth are most commonly supernumerary

A

1) Maxillary incisor area
2) Third molar area
3) Mand. premolar area

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10
Q

What tooth most likely to have crown malformed?

A

3rd molar

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11
Q

What teeth may be peg shaped?

A 
Max LI (1-2%)
Max CI (Very rare)
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12
Q

Gemination (twinning)

A 
one crown
Double in width
One root-one pulp chamber
one canal
*i.e. there are still 4 incisors but can count 5
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13
Q

Fusion

A

two adjacent crowns fuse
two roots-two pulp chambers
Two canals
*i.e. there are only 3 incisors but can count 4

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14
Q

Gemination and fusion occur in perm or prim dentition

A

primary usually

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15
Q

Hutchinson’s incisors

A

aka screwdriver teeth
Caused by congenital syphilis
Have V shape- dont confuse w/ fusion!

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16
Q

Congential syphilis marked by Hutchinson’s incisors as well as ___________?

A

Mulberry molars

Molars with many tubercles on occlusal

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17
Q

Unusually prominent ridge on facial surface most likely on _____?

A

Maxillary CI

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18
Q

Types of extra cusps

A

Tuberculum intermedium-third (middle) lingual cusp on mand. molars
Tuberculum sextum-distal cusp on mand. molars

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19
Q

Talon cusp

A

Similar to extra lingual cusp but have their own pulp horn

*Must do root canal to remove

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20
Q

What teeth usually affected by macrodontia

A

Incisors and canines

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21
Q

What teeth usually affected by microdontia

A

Max LI and 3M

22
Q

Shovel shaped max incisors more common in ____

A

Native americans, asian, mongoloid, and eskimos

23
Q

Dilaceration

A

severe bending at CEJ

24
Q

Flexion

A

Severe bending at location other than CEJ

25
Q

Dilaceration and flexion usually caused by?

A

Trauma

26
Q

Enamel pearls

A

Pearl of dentin w/ enamel cover

-more problematic near CEJ but do not remove them

27
Q

Taurodontia

A

think “toro”-dontia=Bull tooth
More common in neanderthals, native americans, and eskimos
Very large pulp chamber in molars

28
Q

Dens in dente aka Dens invaginatus

A

Tooth within a tooth

*allows communication w/ internal structure so must seal w/ composite

29
Q

Hypercementosis

A

Thickening of cementum caused by trauma or metabolic dysfunction
Causes webbed roots

30
Q

Concresence of roots

A

joining of cementum of adjacent teeth AFTER eruption

31
Q

Dwarfed roots

A

Hereditary or caused by ortho treatment done too quickly

Localized-doesn’t affect all teeth

32
Q

Accessory roots most common on what teeth in maxillary arch

A

First premolar

33
Q

Accessory roots most common on what teeth in mandibular arch

A

Canine and premolar (facial and lingual roots)

34
Q

Impacted tooth

A

Cannot erupt due to mechanical obstruction

35
Q

Unerupted tooth

A

does not have eruptive forces

36
Q

Transposition

A

tooth trades place with another tooth

37
Q

Ankylosis

A

Failure to complete eruption of permanent tooth due to trauma or infection
Loss of pdl so root fuses to bone

38
Q

Ectopic

A

tooth erupts somewhere other than arch

39
Q

Types of enamel dysplasia

A

1) amelogenesis imperfecta
2) fluorosis
3) enamel damage from high fever
4) focal hypermaturation

40
Q

Amelogenesis imperfecta

A

Faulty enamel formation
Hereditary
Total or partial lack of enamel
both dentitions

41
Q

Fluorosis

A

Too much fluoride during formation
Mild=mottled enamel
Severe=pitted enamel

42
Q

Enamel damage due to high fever causes

A

pitted enamel

43
Q

Focal enamel hypoplasia

A

aka turner’s tooth

local trauma or infection

44
Q

Types of dentin dysplasia

A

dentinogenesis imperfecta

tetracycline stain

45
Q

Dentinogenesis imperfecta

A

faulty dentin formation
hereditary
both dentitions

46
Q

Attrition

A

wear of enamel and dentin due to opposing tooth

47
Q

Abrasion

A

Wear due to mechanical means

48
Q

Abfraction

A

bending of tooth due to heavy occlusion with enamel chippin off at cervical

49
Q

Erosion

A

wear due to chemical agents

50
Q

Bruxism

A

40 min of contact every hour during night

Oral Anatomy (12 decks)

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