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Dental Science > Deciduous Teeth > Flashcards

Deciduous Teeth Flashcards

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1
Q

Active Eruption

A

Vertical movement of teeth

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2
Q

Passive Eruption

A

Gingiva recedes, no actual vertical movement takes place as we age

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3
Q

Is eruption of primary and permanent teeth into the oral cavity active eruption or passive eruption

A

ACTIVE

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4
Q

Primary teeth are lighter or darker opacity of enamel???

A

lighter

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5
Q

Pulp chambers of primary teeth are large or small compared to permanent teeth

A

large

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6
Q

Pulp horns of primary teeth are closer or farther from the occlusal plan

A

closer

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7
Q

Dentin is thinner or thicker in primary teeth

A

thinner

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8
Q

Explain exfoliation, resorption and eruption

A

Exfoliation: shedding or eliminating
something from the surface of the body,
as in loss of teeth from jaw bone • Primary roots are resorbed • Permanent teeth move vertically as part of
active eruption, and the primary tooth
loosens • Sometimes, the primary teeth do not
loosen and extraction is required

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9
Q 
removal of
hard tissues
such as
bone,
enamel,
dentin or
cementum
A

Resorption

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10
Q

replace resorbed portions of root

A

cementoblasts

odontoblast

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11
Q

removal of the primary’s root
(dentin, cementum, and small portions of the
enamel crown)

A

odontoclasts

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12
Q

absorb alveolar bone between the

primary and permanent teeth

A

osteoclasts

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13
Q

Shedding and eruption is ____ with
osteoclasts and osteoblasts working to repair
bone as it resorbs

A

intermittent

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14
Q

**Which of the following breaks down
the bone between the primary tooth
and the permanent tooth following it?

A

osteoclasts

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15
Q

General characteristics of molars

A

-Second molars resemble permanent first

molars from same arch

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16
Q

Maxillary Central Incisors

A 
- Wider mesiodistally than
incisocervically
• Mesial and distal outlines
very rounded due to
cervical constriction
• Usually no developmental
depressions or imbrication
lines
• Large cingulum and well
developed marginal ridges
17
Q

Does the mandibular central incisor or maxillary central incisor have a centered cingulum and shallow fossa

A

mandibular central incisor

18
Q 
-Wider than permanent 
• Very symmetrical 
• Prominent, centered
cingulum and shallow fossa
 • Single root with slight
concavity on mesial and
distal aspects 
• Mamelons may be present
A

Mandibular Central Incisors

19
Q 
• Longer incisocervically
than mesiodistally
(opposite the central) 
• Incisal angles are very
bulbous 
• Root is longer in
comparison to crown
length and sharper
apex
A

Max Lateral Incisors

20
Q

how can you tell apart a primary central or lateral for maxillary

A

Incisal angles are very bulbous on the lateral incisors

21
Q 
• Crown is very similar to
mandibular central, but
wider and longer 
• Cingulum is more
developed and offset to
distal 
• Incisal edge slopes distal • Distal Twist!!!!!
 • Distoincisal edge is more
rounded 
• Root may have a distal
curve at apical 1/3
 • Fossa is deeper
A

Mandibular lateral incisors

22
Q

How do you tell apart a mandibular vs maxillary lateral incisors primary

A

Mandibular lateral will have a cingulum more developed and offset to distal

  • incisal edge slopes distal
  • distal twist
23
Q

Maxillary Canines

A

• Mesial cusp slope is longer than distal-opposite #6 &
#11
• Cingulum, marginal ridges and lingual ridges are well
developed
• Lingual ridge runs from cusp tip to cingulum • Tubercle may be present (accessory cusp)
• Cusp tip is offset to the distal from incisal view
• Root is about twice as long as crown

24
Q

Mandibular Canines

A 
• Labial surface is much flatter
than maxillary with very
shallow grooves 
• Distal cusp slope is much
longer 
• Less lingual anatomy with very
shallow fossa 
• Incisal view shows a tapering
to lingual 
• Root is long, narrow and
almost twice the length of
crown
25
Q

How could you tell apart a mandibular canine from a maxillary canine primary

A

mandibular canine will have a distal cusp slope much longer

26
Q 
• Typically 4 cusps, but may
be missing distolingual (3)
 • Same root configuration as
permanent, but more flare
and thinner 
• Prominent transverse ridge
A

Maxillary First Molars

27
Q 
***• Closely resembles the
permanent maxillary first
molar 
***• May have a tubercle of
Carabelli located on the
mesiolingual cusp 
• Crown and roots larger
than primary first
maxillary molar 
• Buccal cusps very similar in
size
A

Maxillary Second Molars

28
Q

• Prominent
mesiobuccal
cervical ridge

Belt tumor hanging over belt
- 4 cusps with mesial larger

A

Mandibular first molars

29
Q

• Closely resembles the
permanent mandibular
first molar because
it has 5 cusps

A

Mandibular Second Molars

Dental Science (27 decks)

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