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DDS1-dental occlusion > variations > Flashcards

variations Flashcards

1
Q

3 factors affecting tooth development and eruption

A
  • nutrition
  • physical phenomenon
  • infection
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2
Q

acquired variations in morphology

A

NOT genetically related

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3
Q

non-environmental variations

A

genetically related

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4
Q

wear mechanisms are

A

non-bacterial and not trauma

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5
Q

wear due to tooth-to-tooth contact

A

attrition

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6
Q

non-masticatory movements

A

abrasion

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7
Q

non-bacterial chemical action

A

erosion

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8
Q

flexural forces

A

abfraction

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9
Q

factors affecting attrition

A
  • diet
  • habits (gum, tobacco)
  • malocclusion
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10
Q

condition involving attrition

A

bruxism

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11
Q

material detached from surface due to hard particles

A

abrasion

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12
Q

toothpaste is a

A

3 surface body

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13
Q

examples of abrasion

A

toothbrushing, pipe smoking

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14
Q

what is worse while toothbrushing

A

horizontal orientation and the actual tooth paste

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15
Q

wedge-shaped lesions with sharp internal and external line angles

A

abfraction

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16
Q

what causes abfraction

A

tensile stress from mastication and malocclusion

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17
Q

mechanism of abfraction

A

flexural forces disrupt enamel and dentin by cyclic fatigue, leading to cracks and chips (cervical area)

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18
Q

loss of a portion of a tooth

A

trauma

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19
Q

abnormal curvature of the crown or root, 45 deg to >90 deg

A

dilaceration or flexion

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20
Q

causes of dilaceration

A
  • traumatic injury

- insufficient space for development

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21
Q

shortened roots with normal sized crown

A

dwarfed roots

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22
Q

excessive cementum around root

A

hypercementosis

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23
Q

causes of hypercementosis

A
  • trauma
  • attrition
  • systemic diseases
  • periapical inflammation
  • perio
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24
Q

which teeth are most affected by hypercementosis

A

premolars

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25
Q

types of hypercementosis

A
  • club shaped
  • focal
  • circular
26
Q

submerged tooth (tooth erupted but failed to reach occlusion)

A

ankylosis

27
Q

mechanism of ankylosis

A

infection of trauma to PDL, looses its PDL space, tooth fuses to alveolar bone

28
Q

which tooth is most commonly affected by ankylosis

A

2nd deciduous molars

29
Q

dens in dente (dens invaginatus)

A

invagination of enamel organ into crown

30
Q

where does dens in dente occur commonly

A

max lateral incisors

31
Q

risk of dens in dente

A

bacteria can easily penetrate pulp chamber

32
Q

types of dens in dente

A

I: coronal third
II: middle third
II: root apex

33
Q

fusion of two teeth at the roots only (via cementum)

A

concrescence

34
Q

where is concrescence commonly observed

A

maxillary molar region

35
Q

causes of accessory roots

A
  • trauma
  • metabolic dysfunction
  • pressure
36
Q

teeth with accessory roots usually

A

3rd molars

37
Q

single rooted teeth that commonly have accessory roots

A

mandibular canines and premolars

38
Q

teeth that dont erupt due to mechanical obstruction

A

impacted teeth

39
Q

another name for supernumerary teeth

A

hyperdontia

40
Q

if the supernumerary tooth is found at the midline of the max arch

A

mesiodens

41
Q

if extra tooth is lingual or buccal to molars

A

paramolar

42
Q

if extra tooth is distal to 3rd molar

A

distomolar

43
Q

most common cause of impacted incisors

A

supernumerary teeth

44
Q

large teeth

A

macrodontia

45
Q

small teeth

A

microdontia

46
Q

factors causing microdontia

A
  • high dosage of drugs

- radiation

47
Q

example of single microdontia

A

peg laterals

48
Q

small teeth and large jaw

A

relative generalized microdontia

49
Q

only small teeth

A

true generalized microdontia

50
Q

most commonly affected by microdontia

A

max lateral incisor

3rd molars

51
Q

peg laterals develop from

A

1 labial lobe (instead of 3)

52
Q

down syndrome patients

A
  • large deciduous
  • small permanent (microdontia)
  • higher prevalence of missing teeth
  • fissure tongue
53
Q

enlarged pulp chamber in posterior teeth (looks like a walking man)

A

taurodontia

54
Q

what causes taurodontia

A

apical displacement of furcation area

55
Q

splitting of a single tooth germ

A

germination or twinning

56
Q

germination

A

single root and common pulp canal

57
Q

union of tooth germs

A

fusion

58
Q

count the tooth as one, there will be reduced # of teeth

A

fusion

59
Q

count the tooth as one, there will be the same # of teeth

A

germination

60
Q

odontogenic tumor

A

odontoma

DDS1-dental occlusion (10 decks)

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