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Boards Dental Anatomy > Misc. > Flashcards

Misc. Flashcards

1
Q

when the mandible moves from CO to edge to edge it moves…?

A

forward and downward

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2
Q

where does the non-working condyle move?

A

downward, forward, and medial

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3
Q

during NON masticatory swallowing, where are the teeth?

A

IN CONTACT in intercuspal position

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4
Q

what exclusively determines intercuspal position?

A

tooth contact

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5
Q

centric relation is a ____ guided position and centric occlusion is a ____ guided posiition

A
  • ligament

- tooth

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6
Q

in the envelope, what is the most superior point?

A

MI

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7
Q

the side shift of the mandible

A

bennett movement

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8
Q

when does bennett movement occur?

A

earliest stage of lateral movement

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9
Q

the bennett movement is the side shift of the mandible towards which condyle

A

the working condyle

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10
Q

another name for physiologic rest position?

A

postural position

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11
Q

what position is not located on the border of the envelope?

A

postural position/ physiologic rest position

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12
Q

what is postural position determined by?

A

the muscles

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13
Q

what fibers will you be using if you are to move from postural position to CO?

A

anterior fibers of the temporalis

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14
Q

what is the usual overjet?

A

2-4mm

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15
Q

horizontal overlap

A

overjet (think of a jet on the horizon)

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16
Q

vertical overlap

A

overbite

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17
Q

what is the main component of enamel?

A

inorganic matter (NOT collagen)

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18
Q

what is the direction of enamel rods in permanent teeth in the cervical third?

A

gingival direction

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19
Q

are a result of normal enemel apposition OUTSIDE tooth

A

perikymata

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20
Q

where are the striae of retzius?

A

inside the tooth

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21
Q

where does dentin form most rapidly for MULTIROOTED teeth

A

floor and roof of the pulp chamber

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22
Q

what percentage of dentin is organic

A

20-30%

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23
Q

what is the primary purpose of the pulp?

A

form dentin

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24
Q

what forms dentin?

A

dental papilla and the pulp

think DP dentin pulp

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25
Q

what type of dentin is mostly highly mineralized?

A

INTRA or peritubular dentin

26
Q

where is the DEJ?

A

occurs at the junction of the dental papilla and the inner enamel epithelium

27
Q

softest dental tissue?

A

cementum

28
Q

where is the acellular cementum?

A

coronal 2/3

29
Q

where is the cellular cementum?

A

apical 1/3

think that all of the cells are down where the blood supply is

30
Q

when viewed from the occlusal arrangement, the teeth appear to be in a ____ shape

A

parabolic

31
Q

when viewed from the occlusal, the 4 posterior teeth in the mandibular arch are aligned in a ______

A

straight line

32
Q

most posterior teeth develope from how many lobes?

A

4 (equals the number of cusps)

33
Q

what are the two exceptions of posterior teeth forming from not 4 lobes?

A
  • permanent first molars (max AND mandib)
  • mandibular second premolars (only three cusp type)

*all form from five lobes

34
Q

do all teeth have distal and mesial marginal ridges?

A

yes

35
Q

what separate cusp ridges from marginal ridges

A

developmental grooves

36
Q

what does a transverse ridge result from?

A

the union of the facial and lingual triangular ridges

37
Q

how many teeth in the permanenet dentition normally have cingula?

A

12 (6 upper and 6 lower)

*ALL anterior teeth

38
Q

how much of the total facio-lingual dimension does the occlusal table make up of a POSTERIOR tooth?

A

55-65%

39
Q

is the junctional epi in the periodontium?

A

yes

40
Q

how wide is the PDL

A

0.2mm

41
Q

how wide is the PDL in old age?

A

decreases to 0.1mm due to deposition of cementum and bone

42
Q

PDL fibers attach what to what?

A

tooth to bone

43
Q

gingival fibers attach what to what?

A

tooth to gingiva

44
Q

what is the predominant connective tissue for PDL fibers?

A

TYPE ONE collagen

45
Q

PDL fibers that provide the major support for a tooth during function

A

oblique fibers

46
Q

which fibers reduce the likelihood of forceful impaction into the alveolus?

A

oblique fibers

47
Q

which group of fibers are the most likely to be found in the middle 1/3 of the root?

A

oblique fibers

48
Q

are transeptal fibers PDL fibers or gingival fibers?

A

gingival

49
Q

fibers that extend from tooth to tooth

A

transeptal fibers

50
Q

approximately how much of PERMANENT root formation is completed at the time the tooth erupts

A

50%

51
Q

when is the apex of a tooth fully formed?

A

2-3 years after the tooth erupts in the mouth

52
Q

all teeth have FACIAL heights of contour in the cervical third except for what teeth?

A

mandibular molars

53
Q

anterior teeth have LINGUAL height of contour in the ____ third

A

cervical

54
Q

most posterior teeth have heights of contour in the ____ third

A

middle

55
Q

what is the exception to all posterior teeth having their heights of contour in the middle third?

A

mandibular second PM

*occlusal third

56
Q

excess of calcified tissue (cementum) formation at the root apex

A

hypercementosis

57
Q

where are supernumerary teeth found in the maxilla?

A

between centrals or as 4th molars

58
Q

when cementum of two teeth join together

A

concrescence

59
Q

developmental abnormality characterized by the presence of fewer teeth than usual

A

oligodontia

60
Q

condition of missing all teeth

A

anodontia

Boards Dental Anatomy (5 decks)

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