Anatomy of Primary Dentition

Question 1

Why are primary teeth important? 5 reasons.

Answer 1

• Need for mastication
• Support cheeks and lips
• Need for speech
• Guide permanent teeth
• Need as space maintainers

Question 2

Do caries progress faster in primary or permanent teeth?

Answer 2

Primary

Question 3

Early exfoliation or extraction of primary teeth may lead to…

Answer 3

Orthodontic problems because baby teeth are “space maintainers”

Question 4

What type of teeth are not included in the primary dentition?

Answer 4

Premolars

Question 5

From what ages do you expect to find a primary dentition?

Answer 5

6 months to 6 years old

Question 6

From what ages do you expect to find a mixed dentition?

Answer 6

6 years to 12 years old

Question 7

What does exfoliation mean?

Answer 7

Primary teeth are being lost

Question 8

What does succedaneous mean?

Answer 8

Teeth that replace primary teeth

Question 9

What teeth are nonsuccedaneous?

Answer 9

Permanent molars

Question 10

From what ages do you expect to find a adult dentition?

Answer 10

After age 12

Question 11

What permanent teeth replace primary molars?

Answer 11

Premolars

Question 12

How are primary teeth labeled in the universal notation?

Answer 12

Letters A-T

Question 13

What is the acronym to remember the second primary molars letters?

Answer 13

Apple Juice Kills Teeth

Question 14

What is the acronym to remember first primary molar letters?

Answer 14

BILS, pay your bills first

Question 15

How are primary enumerated teeth labeled?

Answer 15

By adding an “S” to the end of the most adjacent tooth

Question 16

How are permanent enumerated teeth labeled?

Answer 16

By adding 50 to the number of the most adjacent tooth

Question 17

How are primary teeth labeled in the palmer numbering system?

Answer 17

Using A-E and symbol for each quad

Question 18

Do primary or permanent teeth tend to have more consistent shapes and fewer anomalies?

Answer 18

Primary

Question 19

The primary incisors and canines are _______ mesio-distally than the permanent dentition.

Answer 19

Narrower

Question 20

The primary molars are _______ mesio-distally than the permanent dentition.

Answer 20

Wider

Question 21

What is the space mesial to maxillary canines and distal to the mandibular canines?

Answer 21

Primate space

Question 22

What is the CDE segment that is wider mesio-distally than the 3-4-5 mesio-distal width?

Answer 22

Leeway space

Question 23

What is the ideal spacing between primary teeth called?

Answer 23

Baume Type 1

Question 24

What is the limited/no spacing between primary teeth called?

Answer 24

Baume Type 2

Question 25

Do girls or boys teeth tend to come in first?

Answer 25

Girls

Question 26

Teeth tend to erupt in...

Answer 26

Pairs

Question 27

Do mandibular or maxillary teeth erupt first typically?

Answer 27

Mandibular

Question 28

What color are primary teeth?

Answer 28

Bluish white tint

Question 29

What color are permanent teeth?

Answer 29

Tend to be more yellow/gray compared to baby teeth

Question 30

What is the overall shape of primary teeth?

Answer 30

Small and bulbous crowns with sharp constriction cervically

Question 31

Primary teeth have a sharp inclination in what direction?

Answer 31

Sharp lingual inclination occlusually

Question 32

The roots are more slender and tapering and longer in proportion to the crown in what teeth?

Answer 32

Primary teeth

Question 33

What is the purpose of diverging roots of primary teeth?

Answer 33

So adult teeth can follow

Question 34

What is the pulp anatomy of primary teeth?

Answer 34

Pulp outline follows the DEH more closely than permanent teeth

Question 35

Is the pulp larger or smaller in primary teeth?

Answer 35

Larger

Question 36

Is the pulp closer or farther from the enamel surface in primary teeth?

Answer 36

Closer

Question 37

Is the microscopic structure of the tissues of primary teeth the same as permanent teeth?

Answer 37

Yes

Question 38

When does primary teeth development start?

Answer 38

Prenatal life

Question 39

When does the formation of enamel and dentin of permanent teeth occur?

Answer 39

Postnatal life

Question 40

How is the enamel surface situated in reference to the DEJ?

Answer 40

Enamel surface is parallel to the DEJ

Question 41

What is the thickness of primary enamel?

Answer 41

Primary enamel is half the thickness of permanent teeth

Question 42

What is attrition?

Answer 42

Tooth wear from tooth-to-tooth contact

Question 43

What causes attrition in primary teeth?

Answer 43

Less mineralized enamel

Question 44

What shape overall are primary anterior teeth?

Answer 44

Square

Question 45

Are there mamelons on primary teeth?

Answer 45

No

Question 46

What are the two characteristics of primary anterior roots?

Answer 46

- Longer and narrower roots - Root bends 10 degrees labially

Question 47

Are primary central incisors wider mesio-distally or incisally-cervically?

Answer 47

Mesio-distally

Question 48

Are primary lateral incisors wider mesio-distally or incisally-cervically?

Answer 48

Incisally-cervically

Question 49

What shape are primary canines?

Answer 49

Pentagon

Question 50

Is the mesial cusp ridge longer or shorter than the distal cusp ridge of a primary canine?

Answer 50

Mesial cusp ridge is longer

Question 51

What shape contact areas do primary molars have?

Answer 51

Broad and flat contact areas

Question 52

Are primary maxillary molars wider bucco-lingually or mesio-distally?

Answer 52

Bucco-lingually

Question 53

Are primary mandibular molars wider bucco-lingually or mesio-distally?

Answer 53

Mesio-distally

Question 54

Why are the first primary molars unique?

Answer 54

They can be infected easily

Question 55

Are the primary molars smaller or bigger than their permanent successors (premolars)?

Answer 55

Larger

Question 56

What primary tooth has the highest failure rate for class II restorations?

Answer 56

Mandibular first primary molars

Question 57

How many cusps do the mandibular first primary molars have?

Answer 57

4

Question 58

How many cusps do the maxillary first primary molars have?

Answer 58

3

Question 59

How many roots do the maxillary first primary molars have?

Answer 59

3

Question 60

How many roots do the maxillary second primary molars have?

Answer 60

3