Primary dentition

Question 1

What is the main importance of primary dentition?

Answer 1

Same purpose as permanent dentition, as in mastication, but serves as TEMPORARY space holders for eruption of permanent teeth!

Question 2

Is the size wider or smaller than permanent teeth?

Answer 2

Wider

Question 3

Is crowding a problem in primary dentition?

Answer 3

Yes

Question 4

What is the process of losing primary teeth called?

Answer 4

Exfoliation

Question 5

When does exfoliation

Answer 5

7-12 years

Question 6

Does exfoliation indicate a period at which root resorption of the deciduous tooth begins?

Answer 6

NO

Question 7

How many years after the root is completely formed and the apical foramen is established that resorption begins at the apical extremity?

Answer 7

1 or 2 years

Question 8

How many primary teeth do you have?

Answer 8

20 total, 10 each arch

Question 9

How many incisors, canines and molars do you have in each jaw?

Answer 9

4 incisors, 2 canines, and 4 molars

Question 10

List the primary teeth in terms of eruption times:

Answer 10

Central Incisor, Lateral Incisor, 1st Molar, Canine, Second Molar

Question 11

When is primary dentition complete?

Answer 11

2.5

Question 12

What replaces primary molars?

Answer 12

Permanent Premolars

Question 13

Are premolars found in the primary dentition?

Answer 13

NO

Question 14

The crowns of the primary maxillary first molars resemble the crowns of what?

Answer 14

Permanent Premolars

Question 15

How many roots does the primary maxillary molars have?

Answer 15

Three

Question 16

The deciduous mandibular first molar is unique in that it has a crown like what permanent tooth?

Answer 16

None

Question 17

What system is used to indicate teeth of the primary dentition?

Answer 17

Using Universal Numbering System, teeth are identified as letters

Question 18

True or False: The crowns of primary anterior teeth are wider mesiodistally in comparison with their crown length than are the permanent teeth

Answer 18

ture

Question 19

True or False: The roots of the primary anterior teeth are broader and shorter comparatively to permanent dentitions

Answer 19

FALSE

Roots of primary anterior teeth are narrower and longer!

Question 20

True or False: The roots of the primary molars accordingly are shorter and more broad and compact, than that of the permanent dentition.

Answer 20

FALSE

Roots of Primary Molars are LONGER and more SLENDER, and FLARE more, because it allows for room of the premolars to come in

Question 21

True or False: The cervical ridges of enamel of the anterior teeth are more prominent in primary dentition

Answer 21

True

Question 22

True or False: The crowns and roots of primary molars at their cervical portions are more broad mesiodistally

Answer 22

FALSE- they’re more slender at the cervix

Question 23

True or False: The cervical ridges bucally on the primary molars are much more pronounced especially on the maxillary and mandibular first molars

Answer 23

True

Question 24

True or False: The buccal and lingual surfaces of the primary molars are flatter above the cervical curvatures than those of the permanent molars, which narrows the occlusal surface

Answer 24

TRUE

Question 25

True or False: Primary teeth are usually less pigmented and are whiter in appearance than permanent teeth

Answer 25

t

Question 26

True or False: The enamel cap of primary molars is thicker and has a less consistent depth

Answer 26

FALSE; the enamel cap of primary molars is thinner and has a more consistent depth

Question 27

Do primary molars have a greater thickness of dentin on the pulpal wall?

Answer 27

YES

Question 28

Do primary molars have pulpal horns that sit higher than permanent molars?

Answer 28

YES

Question 29

Does the primary central incisor contain mamelons?

Answer 29

NO

Question 30

Is the crown of the primary central incisor greater mesiodistally than cervicoincisally?

Answer 30

YES- opposite is true of permanent central incisors

Question 31

Does the primary lateral incisor have a smaller crown and more curved incisal edge?

Answer 31

YES

Question 32

What has a greater length of the primary lateral incisor crown, cervicoincisal or mesiodistal?

Answer 32

Cervicoincisal

Question 33

Does the primary canine resemble a central or lateral incisor more?

Answer 33

NEITHER- it has a specific function, thus doesn't look like any other tooth

Question 34

How is the cusp on the maxillary primary canine in comparison to that of the maxillary permanent canine?e

Answer 34

LONGER AND SHARPER

Question 35

Does the maxillary primary canine have a cingulum?

Answer 35

YES

Question 36

Where does the root taper on the primary maxillary canine?

Answer 36

Tapers lingually and inclined distally

Question 37

What shape does the primary maxillary canine crown take from the incisal aspect?

Answer 37

DIAMOND

Question 38

Does the mandibular central incisor have mameolons, or developmental grooves?

Answer 38

NO

Question 39

Does the mandibular primary central incisor have a cingulum and marginal ridges?

Answer 39

YES

Question 40

Does the mandibular primary lateral incisor have a slight distal tilt?

Answer 40

YES

Question 41

What tooth is the mandibular primary lateral incisor more similar to?

Answer 41

Primary Central Incisor

Question 42

What does the maxillary first molar look like?

Answer 42

A maxillary first premolar but with an oblique ridge!

Question 43

Which tooth has larger measurements, the primary maxillary first molar or second molar?

Answer 43

Primary Maxillary Second Molar

Question 44

Does the primary maxillary 1st molar have a cervical ridge?

Answer 44

YES- which is more pronounced on primary than permanent

Question 45

What are the three teeth we have studied that contain an oblique ridge?

Answer 45

Permanent Maxillary 1st and 2nd molars, and primary maxillary 1st molar

Question 46

Which primary tooth resembles a permanent maxillary first molar the most?

Answer 46

Primary maxillary second molar, but its way smaller

Question 47

Does the primary maxillary second molar have a supplemental cusp too?

Answer 47

YES

Question 48

Which tooth does not resemble any other tooth deciduous or permanent?

Answer 48

Primary Mandibular 1st Molar

Question 49

On the occlusal surface of the primary mandibular first molar, which cusp is the largest and best developed of all the cusps, as it has a a broad, flattened surface lingually?

Answer 49

Mesiolingual Cusp

Question 50

What tooth does the primary mandibular second molar resemble?

Answer 50

Permanent mandibular 1st molar

Question 51

What tooth replaces the primary mandibular second molar?

Answer 51

Mandibular 2nd premolar

Question 52

How many cusps from the lingual aspect of the primary mandibular 2nd molar can you see?

Answer 52

3

Question 53

Which tooth has a lot of secondary anatomy?

Answer 53

Primary Mandibular 2nd Molar

Question 54

True or False: The oblique ridge consists of the distal ridge of the mesiolingual cusp and the triangular ridge of the distofacial cusp

Answer 54

TRUE

Question 55

What is an oblique ridge?

Answer 55

Transverse ridge that crosses the tooth obliquely

Question 56

What makes up the triangular ridge on the mesiolingual cusp?

Answer 56

Cusp, Mesial Ridge, Distal Ridge to form the triangular ridge of the mesiolingual cusp