Development of Primary Dentition

Question 1

Between what ages do the primary dentition typically erupt?

Answer 1

8-30 months

Question 2

If the primary dentition erupts late, how will this correlate with the permanent dentition eruption?

Answer 2

Permanent will erupt later too

Question 3

How many teeth are there in deciduous dentition?

Answer 3

20 teeth

Question 4

Which tooth is the first primary tooth to erupt?

Answer 4

Lower central incisor

Question 5

Which tooth is the last primary tooth to erupt?

Answer 5

Upper second molar

Question 6

Is there more or less enamel in primary teeth?

Answer 6

Less enamel

Question 7

Are the following characteristics of the deciduous dentition or permanent?
A.Symmetrical crown shapes
B.Interdental spacing
C.No angulation of the incisors
D.Less variability in occlusal relations than the permanent dentition

Answer 7

Primary dentition

Question 8

Is it beneficial to have spacing between the primary incisors? Why?

Answer 8

Yes; allow spacing

Question 9

T/F: In 75-80% of the time, if there is no interdental spacing in the primary teeth, crowding of the permanent teeth will NOT occur

Answer 9

False: Will occur

Question 10

Widening of the arches occurs between the canines during ___- ____ yrs old?

Answer 10

4-8 yrs old

Question 11

T/F: If there is crowding in the primary dentition, severe crowding will occur in the permanent dentition

Answer 11

True

Question 12

______ between anterior primary teeth are important to get space for permanent incisor eruption

Answer 12

Diastemas

Question 13

The upper incisors erupt to the _____ of primary teeth.

Answer 13

labial

Question 14

Lower incisors tend to erupt to the ______.

Answer 14

lingual

Question 15

T/F: There is no significant increase in arch size during the eruption of the permanent incisors

Answer 15

True

Question 16

Anterior primary teeth are _____ than permanent teeth

Answer 16

smaller

Question 17

T/F: Some primary posterior teeth are larger than their successor

Answer 17

True

Question 18

Which primary tooth is much larger than its successor and is a major tool to create space?

Answer 18

2nd primary molar

Question 19

An imaginary surface that passes through the occlusion of the teeth.

Answer 19

Occlusal plane (OP)

Question 20

Primary teeth are positioned _____ degrees to the occlusal plane(Permanent teeth are not)

Answer 20

90 degrees

Question 21

: (response of the dentoalveolar process to the skeletal dysplasia or to functional disturbance) are not fully expressed

Answer 21

Dentoalveolar compensations

Question 22

T/F: If a malocclusion is diagnosed in the primary dentition, it will probably get worse during growth

Answer 22

True

Question 23

The degree of vertical overlap of the mandibular incisors by their maxillary antagonists,

Answer 23

Overbite (Vertical overbite)

Question 24

The distance between the labial surface of the mandibular incisors and the labial aspect of the incisal edge of the maxillary incisors,

Answer 24

Overjet (Sagittal overbite)

Question 25

In ________, you must intervene quickly

Answer 25

Amelogenesis imperfecta

Question 26

Which condition is worse? DI or AI

Answer 26

DI