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Dental Anatomy > Ch 6 Sec 1&2 > Flashcards

Ch 6 Sec 1&2 Flashcards

1
Q

Another name for primary teeth

A

deciduous

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2
Q

the Latin word “decidere” means?

A

to fall off

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3
Q

common nicknames for deciduous/primary teeth?

A

baby teeth, milk teeth, temporary teeth

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4
Q

the dentition that follows the primary teeth is called?

A

permanent dentition

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5
Q

permanent dentition can also be called?

A

secondary dentition or adult dentition

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6
Q

Are there primary premolars?

A

No

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7
Q

primary molars are replaced by?

A

permanent premolars

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8
Q

succedaneous

A

the 20 permanent teeth that replace or succeed their primary tooth predecessors

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9
Q

Do the 12 permanent molars have predecessors in primary dentition?

A

No. They erupt distal to the primary molars.

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10
Q

Are permanent molar succedaneous teeth?

A

No. Because they do NOT replace primary teeth, they erupt distal to the primary molars.

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11
Q

How many primary teeth are there?

A

20

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12
Q

primary teeth can be identified using the?

A

Universal Identification System by assigning letters A-T, starting with A on the maxillary right 2nd molar and ending on the mandibular right 2nd molar.

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13
Q

What are some reasons that primary teeth are important?

A

1) mastication (aka chewing)
2) support for cheeks and lips, maintaining a normal facial and smile appearance
3) formulation of clear speech
4) critical for maintaining space required for eruption of permanent teeth

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14
Q

Deep decay (infection of pulp) in the primary tooth can lead to disruption of _____ formation in the permanent tooth? This is called?

A

enamel

enamel hypoplasia

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15
Q

turner hypoplasia

A

discolored spot in the permanent tooth due to disruption in enamel formation from infected primary teeth

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16
Q

Eruption of primary teeth is considered normal if its within ____ months of typical eruption time

A

4 to 5 months early or late

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17
Q

Eruption of permanent teeth is considered normal if its within ____ months of typical eruption time

A

12 to 18 month early or late

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18
Q

mixed dentition

A

both primary and permanent dentition present

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19
Q

edentulous

A

No teeth, lacking teeth

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20
Q

Approximate age for no teeth (edentulous)?

A

birth to 6 months

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21
Q

Approximate age for primary dentition only?

A

6 months to 2 1/2 years old= eruption of primary teeth

2 1/2 to 6 years old= all primary teeth present

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22
Q

Approximate age for mixed dentition?

A

6 to 9 years= all eight permanent incisors are replacing primary
9-12 years= all four permanent canines and eight premolars are replacing primary

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23
Q

exfoliation

A

shedding of baby teeth

24
Q

Approximate age for permanent dentition only?

A

after 12 years= all primary teeth exfoliated

25
Q

second molars are also called?

A

12 year molars

26
Q

Typically once the 12 year molars or second molars have erupted the mouth is _____ dentition?

A

permanent

27
Q

If present, 3rd molars typically erupt when?

A

17 to 21 years old

28
Q

Wisdom teeth are?

A

3rd molars

29
Q

permanent teeth begin forming in?

A

the jawbone

30
Q

The crowns of all 20 primary teeth begin to calcify when?

A

4 and 6 months in utero

31
Q

crown completion of all primary teeth occurs within?

A

the first year after birth, taking an average of 10 months from the beginning of tooth calcification

32
Q

when does root formation of primary (and permanent teeth) begin?

A

Once the enamel on the crown is formed, and at the same time, the tooth starts its occlusion movement through bone toward the oral cavity

33
Q

attrition

A

wear of tooth, process of gradually reducing strength or effectiveness

34
Q

What are the first primary teeth likely to erupt?

A

1) mandibular central incisors (about 6 to 10 months)
2) maxillary central incisors
3) maxillary lateral incisors
4) mandibular lateral incisors

35
Q

What are the last primary teeth to emerge?

A

maxillary second molars

36
Q

What teeth erupt after incisors?

A

primary 1st molars, then canines, then second molars

37
Q

after primary teeth erupt, there ____ are completed around 18 months to 3 years?

A

roots

38
Q

Are primary molars larger or smaller than the premolars that replace them?

A

larger. They are wider

39
Q

leeway space

A

The extra space given for premolars to erupt into bc the primary molars are larger

40
Q

primate space

A

the space between primary anterior teeth, occur mesial to the maxillary canines and distal to the mandibular canines

41
Q

primate space good or bad?

A

This space concerns parents but its good because it gives more space for permanent. Typically get larger as the mandible and maxillary grow larger

42
Q

Why do primary molar roots have a flare?

A

The space saved by the roots helps preserve space for premolars and secondary canines

43
Q

root resorption

A

gradual breakdown and loss of root structure

44
Q

primary roots begin to resorb?

A

about 3 years after completion, so primary teeth are only complete for a short while

45
Q

where does resorption start on a root?

A

at the apex or along the side of the root close to the apex

46
Q

mixed dentition starts around what age?

A
  1. When the permanent molars emerge, then incisors
47
Q

mixed dentition usually ends around what age?

A

12

48
Q

permanent tooth crowns begin to form when?

A

at birth, with the permanent first molars

49
Q

When do permanent teeth crowns cease to form?

A

around 16 when the 3rd molar is completed

50
Q

crown formation of most crowns of permanent teeth take how long?

A

3 to 4 years

51
Q

crown completion occurs

A

about 3 to 4 years later, after crown formation and prier to tooth eruption

52
Q

How long does it take succedaneous teeth to erupt after the primary tooth is exfoliated?

A

about a year

53
Q

Age of eruption for permanent incisors and canines/premolars?

A

incisors (6 to 9)

canines/premolars (9-12)

54
Q

Order of eruption of permanent teeth?

A 
6 year molars
mandibular central incisors
maxillary central incisors (7-8)
mandibular lateral incisors (7-8)
maxillary lateral incisors
mandibular canines (9)
mandibular premolars
Maxillary premolars
maxillary canines (close to 12)
55
Q

What is the only mandibular permanent tooth likely to erupt AFTER its maxillary counterpart?

A

second premolar

56
Q

Last permanent tooth to emerge?

A

maxillary canines (unless they have 3rd molars present)

57
Q

roots of secondary teeth are likely to finish forming?

A

about 3 years after their emergence into the oral cavity

Dental Anatomy (19 decks)

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