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Molar Traits > Primary Dentition > Flashcards

Primary Dentition Flashcards

1
Q

How many primary teeth are there?

A

20

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2
Q

What is the dental formula for primary dentition?

A

2-1-2

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3
Q

What is the dental formula for permanent dentition?

A

2-1-2-3

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4
Q

What are the three annotation systems used?

A

Universal (A-T)
Palmer (A-E and Quad)
FDI International (Quad 5-8 and tooth # 1-8)

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5
Q

What annotation system is used by americans?

A

Universal

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6
Q

What annotation does most other countries use?

A

FDI International

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7
Q

What is the eruption timeline for primary teeth?

A 
Central Incisor 6-8 months
Lateral Incisor 7-9 months
First Molar 12-14 months
Canine 16-18 months
Second Molar 20-24 months
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8
Q

What is the exfoliation timeline for primary teeth?

A 
Central 6-7;7-8
Lateral 7-8;8-9
Canine 9-10;10-11
1st Molar 10-11;10-12
2nd Molar 11-12; 10-12
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9
Q

True or false; mamelons are present on primary teeth.

A

False

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10
Q

What color are primary teeth?

A

Whiter due to thinner enamel

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11
Q

From the incisal cervical dimension how would you describe the size of primary teeth?

A

Short

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12
Q

How would you describe the roots of primary teeth?

A

Longer, narrower and flare and the root trunk is nearly absent.

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13
Q

True or false; the occlusal/incisal anatomy are prominent.

A

False, less pronounced.

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14
Q

How would you describe the occlusal table of primary teeth?

A

Smaller with more of a buccal-lingual convergence.

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15
Q

True or false; the contacts of primary teeth are broad and flat.

A

True

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16
Q

Which molar in primary teeth is bigger?

A

2nd molar

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17
Q

In comparison to permanent dentition how would you describe the enamel, dentin, pulp and pulp horns of primary teeth?

A

Enamel & Dentin = thinner
Pulp = large
Pulp Horns = more accentuated (especially mesial to deciduous teeth)

18
Q

Which direction do primary teeth drift?

A

Toward the midline

19
Q

What are the functions of primary dentition?

A
  1. Maintain space

2. Guide for permanent eruption

20
Q

What is the type trait of primary max. central incisors?

A

No mamelons; wider M-D

21
Q

What is the type trait of primary canines?

A

Contacts at the same level.

22
Q

What is the type trait of primary molars?

A

2nd looks like permanent 1st molar.

23
Q

How many roots are in the primary molar maxillary arch typically?

A

3

24
Q

How many cusps are typically found in the maxillary molars of primary teeth?

A

3 to 4

25
Q

What cusp bulges on maxillary molars of primary dentition?

A

MB

26
Q

How many roots are typically seen in molars of the mandibular arch?

A

2

27
Q

How many cusps are typically seen in molars of the mandibular arch?

A

4

28
Q

How would you describe the ML cusp of molars in the mandibular arch of primary dentition?

A

Very tall and pointed.

29
Q

What are the four functions of dental curvatures?

A
  1. Stabilize the arch
  2. Prevent Disease
  3. Disperse occlusal forces
  4. Protect soft tissues
30
Q

What type of relationship is exhibited by dental curvatures?

A

Symbiotic relationship

31
Q

What 3 issues are associated with improper curvatures?

A
  1. Premature tooth loss
  2. Periodontal problems
  3. Occlusal discrepancies
32
Q

How are proximal contact areas of primary teeth defined?

A

Adjacent tooth surfaces that touch.

33
Q

What are two reasons contact areas can increase in primary dentition?

A
  1. Attrition

2. Toward posterior

34
Q

Where are the contact locations found in primary anterior teeth?

A

Incisally placed centered facial to lingual.

35
Q

Where are the contact locations found in primary posterior teeth?

A

Middle 1/3 buccal of center.

36
Q

Why are contacts important?

A
  1. Prevent food impaction

2. Stabilization of the arch “synergy of stabilization”

37
Q

What two major issues can occur due to improper contacts?

A
  1. Gingivitis (most common)

2. Alignment changes…can cause bone and muscular changes, destroy tooth structure, and support system.

38
Q

What are embrasures?

A

V-shaped spaces formed around proximal contact

39
Q

What are the shape and size of embrasure spaces of the buccal and lingual aspects?

A 
Buccal = wide
Lingual = narrower/longer
40
Q

What are the functions of embrasures?

A
  1. Spillway for escape of food.
  2. Reduces occlusal trauma
  3. Self-cleansing
  4. Protects gingiva

Molar Traits (4 decks)

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