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Spanish Peds > Differences between primary and permanent > Flashcards

Differences between primary and permanent Flashcards

1
Q

How many teeth are in primary dentition?

A

20

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2
Q

When does the first tooth appear?

A

6th month

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3
Q

When have all the primary teeth erupted?

A

24-36th month
(2-3years)

By the 36th month all the primary teeth have
completely erupted and are in occlusion.

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4
Q

Main functions of the primary dentition? (5)

A
  • cut food
  • keep space for permanent dentition
  • stimulate growth
  • enable fonation
  • esthetic
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5
Q

Differences between primary and permanent dentition are located at..: (3)

A
  • crown
  • roots
  • pulp chamber
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6
Q

The predominant diameter for primary dentition versus permanent? What aspect do the teeth have

A

Primary: mesio-distal diameter predominant. Squatted aspect

Permanent: cervico-incisal

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7
Q

Primary vs Permanent crown:

Smaller crown

A

Primary

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8
Q

Primary vs Permanent crown:

Incisors have develpomental grooves / mammelons?

A

Primary

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9
Q

Primary vs Permanent crown:

Primary converge towards…?

A

occlusal of the facial and

lingual surfaces

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10
Q

Primary vs Permanent crown:

narrower occlusal face?

A

primary

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11
Q

Primary versus permanent crown:

Less accentuated cervical line?

A

Permanent

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12
Q

Primary vs Permanent crown:

Constricted at the cervix?

A

primary

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13
Q

Primary vs Permanent crown:

Thicker enamel and dentine layers?

A

Permanent

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14
Q

Primary vs Permanent crown:

Primary enamel - rods in the cerival area are directed _____

A

occlusally

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15
Q

Primary vs Permanent crown:

Primary - enamel finishes where?

A

in a well defined border

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16
Q

Primary vs Permanent crown:

Primary molars have a prominent _____ bulge

A

mesio-buccal

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17
Q

Primary vs Permanent crown:

Primary contact surfaces?

A

broad and flat

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18
Q

Primary vs Permanent crown:

Lighter whiter color?

A

primary

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19
Q

Primary vs Permanent crown:

Physiological erosion?

A

primary

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20
Q

Primary vs Permanent roots:

Primary roots ____ & ____ comapared with crown

A

longer and thinner

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21
Q

Primary vs Permanent roots anterior teeth:

primary roots are narrower in ____ direction

A

mesio-distal

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22
Q

Primary vs Permanent roots anterior teeth:

Primary apical curves ___

A

buccaly

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23
Q

Primary vs Permanent roots anterior teeth:

permanent tooth bud located ____

A

lingually

24
Q

Primary vs Permanent roots molars:

Primary have a more _____ cifurcation

A

cervical (cinodontia)

25
Q

Primary vs Permanent roots molars:

less divergent roots?

A

permanent

26
Q

Primary vs Permanent roots molars:

primary narrower _____ than _____

A

mesiodistally than buccalingually

27
Q

Primary vs Permanent pulp:

larger pulp?

A

primary

28
Q

Primary vs Permanent pulp:

Pulp horns closer to the outer surface?

A

primary

29
Q

Primary vs Permanent pulp:

Great variation in size and location?

A

primary

30
Q

Primary vs Permanent pulp:

lower mesial pulp horn?

A

permanent

31
Q

Primary vs Permanent pulp:

shallow pulp chamber?

A

primary

32
Q

Primary vs Permanent pulp:

form of pulp follows the external anatomy?

A

primary

33
Q

Primary vs Permanent pulp:

Usually a pulp horn under each cusp?

A

primary

34
Q

Primary vs Permanent pulp:
Pulp chamber on the mandibular molars is
bigger than the one in maxillary molars?

A

primary

35
Q

Primary vs Permanent pulp:

Anterior teeth have no clear separation between pulp chamber and root canal?

A

primary

36
Q

Primary vs Permanent physical properties:

hardness? (2)

A

smaller hardness of enamel and dentin

37
Q

Primary vs Permanent physical properties:

enamel permeability? why? (4)

A

higher permeability

  • Less time of formation.
  • Less mineralization.
  • Less thickness.
38
Q

Primary vs Permanent physical properties: caries progression?

A
  • bigger and faster progress

- enables a better absorption of the fluor

39
Q

Primary vs Permanent physical properties:

radiopacity?

A

permanent: 92% minearl salts
primary: 86-88%

40
Q

Primary vs Permanent physical properties: softness?

A

softer

41
Q

Primary vs Permanent physical properties: color?

A

lighter

42
Q

Primary vs Permanent histological properties:

enamel shape? (2)

A

prisms - have similar microscopical properties as permanent dentition
- never get to external surface because crown has a thin layer of aprismatic enamel

43
Q

Primary vs Permanent histological properties:

aprismatic enamel?

A

-in primary dentition is all over the crown

44
Q

Primary vs Permanent histological properties:

apsrimatic enamel acid etching time?

A

longer time needed

45
Q

Primary vs Permanent histological properties:

Neonatal line?

A

may be seen

  • indicates separation between enamel formed before birth and after
  • LESS mineralized
46
Q

Primary vs Permanent histological properties:

Retzius lines?

A
  • thin lines that mark position of different layers of enamel.
  • SCARCE in primary dentition
47
Q

Primary vs Permanent histological properties:

molar fossas?

A

We may find microdefects in the molar fossas. They

are imperceptible

48
Q

Primary vs Permanent histological properties:

dentin tubules?

A

less dense

49
Q

Primary vs Permanent histological properties: tubules?

A
  • Less density of dentin tubules

- may see big tubules full of collagen type I & II INSTEAD of odontoblasts

50
Q

Primary vs Permanent histological properties:

interblobular spaces?

A

not many spaces

51
Q

Primary vs Permanent histological properties:

multiradial teeth?

A

may find incomplete fissures or cracks in the furcation area

52
Q

Primary vs Permanent histological properties: pulp? (3)

A

• Less histological development because their
time of maturation is shorter.
• Frequent anastomosis or unions between arteries and veins.
• There are more nervous terminations in the
crown than in the root.

53
Q

Primary vs Permanent histological properties: cement?

A
  • May be celular or acelular cement

- predominance of acelular cement on upper 2 thirds of root

54
Q

Primary vs Permanent histological properties:

cement location?

A
  • only present on the outer surface of the

root, it does not go inside the apex foramen

55
Q

Primary vs Permanent histological properties:

cement CEJ?

A
  • enamel and the cement are always in contact, and

sometimes the cement overlaps the enamel

Spanish Peds (9 decks)

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