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Dental anatomy > primary and mixed dentition > Flashcards

primary and mixed dentition Flashcards

1
Q

name some functions of primary teeth

A

chewing, support for lips and cheeks, maintain arch space room for secondary dentition

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2
Q

what happens if primary teeth fall out too early?

A

cause guidance problems for the secondary teeth

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3
Q

what are turners spots?

A

when a primary tooth has decay and passes it onto the incoming tooth

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4
Q

no teeth stage ( edentulous)

A

birth to 6 or 8 months

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5
Q

primary dentition only stage

A

they erupt from 6 months to 2 years, all 20 are present until about 6 years of age

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6
Q

mixed dentition stage

A

6-12 years

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7
Q

adult dentition only stage

A

after 12. ( last tooth erupts around late teens/early 20’s)

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8
Q

why are secondary teeth more yellow?

A

higher level of dentin

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9
Q

what pushes teeth out?

A

the root formation

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10
Q

primary crowns begin to form when?

A

6 months in utero

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11
Q

crowns are complete when?

A

about 10 months after beginning

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12
Q

roots are complete when?

A

1.5-3 years after emergence

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13
Q

exfoliation of primary teeth occurs when?

A

6-12 years

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14
Q

secondary crowns begin to form/calcify when?

A

beginning at birth for first 2 molars, 3rd molar is 8-10 years

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15
Q

how long are the crowns complete before erupting?

A

about 3 years

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16
Q

after eruption how long is it until roots are complete?

A

about 3 years

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17
Q

order of emergence of primary teeth

A 
first- mandibular central incisor
second- other incisors ( maxillary laterals are last)
third- first molars
fourth- canines
fifth- second molars
18
Q

order of emergence of secondary teeth

A 
1st- first molars followed by mandibular central incisors ( about 6 years)
2nd-other incisors
3rd- mandibular canines
4th- premolars
5th- maxillary canines
6th- second molars
7th-third molars
19
Q

name some traits of all primary teeth

A

cervical crown bulges, long root compared to crown, more wear( less mineralized)

20
Q

dentition traits of anterior primary teeth compared to secondary

A

no labial depressions or perikymata, roots bend labially in apical 1/3

21
Q

dentition traits of primary molars

A

prominent mesial cervical ridges ( bulge)

22
Q

primary molar traits continued

A

second molars are larger than first, enamel rods slope occlusally,

23
Q

primary molar roots

A

furcations are near crown ( small root trunks) this allows incoming teeth to move up

24
Q

primary incisor crowns

A

longer incisocervically than mesiodistally ( except maxillary central)

25
Q

incisor lingual view

A

large cingulum

26
Q

incisors proximal view

A

all roots bend facially in apical 1/3 of root, maxillary incisor root also bend lingually in cervical half

27
Q

incisors incisal view

A

maxillary central is much wider mesiodistally than faciolingually. Others are about equal.

28
Q

primary canine labial view

A

maxillary- about as wide and long

mandibular- like secondary; longer incisocervically than mesiodistally

29
Q

primary maxillary canine lablial view

A

longer mesial marginal ridge making its contact more cervical ( just like an adult maxillary PM)

30
Q

primary mandibular canine labial view

A

longer distal marginal ridge than mesial. Not as pointy as maxillary

31
Q

primary canine lingual view

A

maxillary have more prominent ridges and cingulum

32
Q

primary canine proximal view

A

cervical third very thick. Has pronounced lingual and cervical bulges

33
Q

canine cusp tips

A

maxillary is more labial, mandibular is more lingual

34
Q

primary molar root traits

A

maxillary have 3, mandibular have 2

35
Q

primary molar length vs its replacement

A

wider mesiodistally than the premolars that replace them

36
Q

where is the prominent bulge on all primary molars?

A

mesiobuccal

37
Q

where do the cervical lines curve in primary molars?

A

apiccaly in mesial half of buccal surface

38
Q

primary second molars resemble what?

A

secondary first molars “mini me”

39
Q

primary first molar

A

“wanna be” , maxillary looks like premolar, mandibular looks like nothing

40
Q

primary maxillary first molar

A

crown is wider faciolingually than mesiodistally, occlusal groove is “H” form

41
Q

primary mandibular first molar

A

4 cusps, wider mesiodistally, prominent mesiobuccal cervical ridge, prominent mesial transverse ridge, occlulsal table wider buccolingually in distal half.

42
Q

pulp cavities of primary teeth

A

larger in proportion to the tooth. Molar chambers are mostly in the crown

Dental anatomy (14 decks)

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