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Oral Anatomy FINAL > Dental Anomalies > Flashcards

Dental Anomalies Flashcards

1
Q

Dental anomalies occur more often in the __________ dentition

A

permanent

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2
Q

dental anomalies occur more often in the __________ arch

A

maxillary

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3
Q

total (complete) anodontia

A

absence of any teeth

total lack of primary or permanent

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4
Q

total anodontia is most often associated with…

A

abnormal development of the ectoderm

may also find deviations in hiar, nails, sweat glands, salivary glands

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5
Q

partial anodontia

A

congenitally missing teeth
1 or more missing teeth from the dentition
often familial trait

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6
Q

List the most common congenitally missing teeth from most common - least common

A

mx 3rds
md 3rds
md 2nd premolars
mx lateral incisors

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7
Q

what % of the population have missing mx laterals

A

1-2%

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8
Q

supernumerary teeth occur most often in the ______ arch

A

maxilla
can be found in any segment of the arch
varied forms

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9
Q

% occurrence of supernumerary teeth in primary dentition

A

.5%

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10
Q

mesiodens

A

cone shaped supernumerary small tooth that forms between the centrals
may be erupted or unerupted
often causes a diastema

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11
Q

supernumerary teeth in 3rd molar region most commonly found in ______ arch

A

maxillary

may also be seen in the mandible

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12
Q

names for supernumerary teeth in third molar region

A

distomolars
paramolars
4th molars

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13
Q

Most common places to have supernumerary teeth

A

between mx centrals
3rd molar region
mandibular premolar area (similar in shape and size to md premolar)

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14
Q

third molars are more variable in the ______ arch

A

maxillary

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15
Q

variations of third molars

A

vary considerably in crown shape
small, peg shaped
large variations resembling 1st and 2nd molars

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16
Q

peg laterals may be a variable expression of….

A

the same genetic trait that results in missing laterals

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17
Q

gemination (twinning)

A

incomplete splitting of single forming tooth (tooth germ)
results in large crown with single root and pulp canal
If it is counted as a SINGLE tooth the dentition with have the correct # of teeth

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18
Q

gemination is most often observed in which teeth

A

mx anteriors

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19
Q

gemination more common in _____ dentition

A

primary

20
Q

fusion

A 
fusion of two adj teeth
appears similar to gemination
two distinct roots and pulp chambers
dentin involved
total # of teeth will be correct if entity counted as TWO teeth
21
Q

fusion occurs more commonly in which teeth

A

anterior

22
Q

fusion occus more commonly in the _____ dentition

A

primary

23
Q

fusion occurs more commonly in _____ incisors

A

mandibular

24
Q

_____ teeth can also be fused to an adjacent tooth

A

supernumerary

25
Q

Hutchinson’s teeth

A

unusually shaped incisors/molars
caused by prenatal syphilis
aka mulberry molars
may be an increase in incidence since syphilis has risen recently

26
Q

Hutchinson’s teeth - incisors appearance

A

screwdriver shaped - broad cervical, narrow incisal

notched incisal edge

27
Q

Hutchinson’s teeth - first molars appearance

A

occlusal w numerous poorly developed cusps and ridges

numerous berry-like tubercles

28
Q

accessory cusps, tubercles, ridges can happen where

A

almost any tooth

29
Q

small enamel projections may result from…

A

localized enamel hyperplasia

crowded conditions resulting in fusion of a supernumerary tooth

30
Q

tuberculum intermedium

A

3rd lingual cusp on a md molar

31
Q

tuberculum sextum

A

extra cusp on a distal marginal ridge

32
Q

enamel pearls

A

small round nodule with a core of dentin

most often found on distal of 3rd molars or furcation of permenent molars

33
Q

taurodont

A

bull tooth

characterized by long pulp chamber with no cervical constriction and little differentiation of root structure

34
Q

talon cusps

A

enamel projection most often coming from cingulum area of anterior teeth
may need to remove in order to allow for proper occlusion - may result in pulpal exposure since a pulp horn projecting into the talon cusp is often present

35
Q

macrodontia/microdontia

A

normally shaped teeth except for size of the tooth/teeth

may present in entire dentition/portion of dentition/single tooth

36
Q

shovel shaped incisors present most commonly in which populations

A

asian
mongoloid
eskimo
american indian

37
Q

shovel shaped incisors

A

pronounced cingulum and marginal ridges
scoop appearance of lingual
may not be a true anomaly but instead a racial physical characteristic

38
Q

double shoveling

A

pronounced cingulum and marginal ridges AND prominent ridges found on mesial/distal of facial surface

39
Q

dilaceration

A

severe bend/distortion of a tooth and/or crown

flexion of root often used to describe curve/bend of tooth root

40
Q

dens in dente

A

tooth within a tooth
results from invagination of enamel organ within the crown
appears as deep crevice - usually in cingulum of incisors
Xray appears as an elongated mass of enamel within the dentin of an average sized tooth
may be in peg laterals

41
Q

dens in dente most often observed in _____

A

mx laterals

42
Q

concrescence

A

superficial fusion of the cementum of adj teeth

may be related to abnormal cementum deposition

43
Q

concrescence is most common in _______ region

A

maxillary molar region following eruption

44
Q

dwarfed roots

A

may present in normal sized crown
may be hereditary
can be caused by rapid tooth movement during ortho

45
Q

hypercementosis

A

after tooth has erupted

result of trauma, metabolic dysfunction, periapical inflammation

46
Q

accessory roots are commonly found in ______

A

third molars

Oral Anatomy FINAL (2 decks)

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