Deciduous Teeth

Question 1

How many deciduous teeth are present in each quadrant?

Answer 1

5

Question 2

What are the deciduous teeth present in each quadrant?

Answer 2

2 incisors
1 canine
0 pre-molars
2 molars

Question 3

What is the function of interproximal spaces between primary teeth?

Answer 3

Allows for proper alignment of future permanent dentition

Question 4

What is the average age for the eruption of the first tooth?

Answer 4

6-10 months

Question 5

What are 4 potential problems with the premature loss of deciduous teeth?

Answer 5

1. Loss of arch length
2. Delayed of premature eruption of permanent tooth
3. Alteration in bite
4. Shift in midline of teeth

Question 6

What are 6 main comparisons between deciduous and permanent teeth?

Answer 6

1. Deciduous teeth are whiter
2. Deciduous teeth are smaller in overall size
3. Deciduous teeth have a more prominent cervical ridge
4. Deciduous teeth roots are more divergent
5. Deciduous teeth have less mineralised crowns
6. Deciduous teeth have proportionately larger pulp cavities

Question 7

What is the general order of eruption of deciduous teeth?

Answer 7

1. Central incisor
2. Lateral incisor
3. First molar
4. Canine
5. Second molar

Question 8

Which dental arch tends to have teeth erupt first?

Answer 8

Mandibular

Question 9

What is a rough rule which compares the number of teeth erupted and time taken?

Answer 9

6/4 - For every 6 months aged, 4 teeth emerge

Question 10

What is the general order of eruption of permanent teeth?

Answer 10

1. 1st molar
2. Central incisor
3. Lateral incisor
4. Canine
5. 1st premolar
6. 2nd premolar
7. 2nd molar
8. 3rd molar

Question 11

When is the first evidence of crown formation?

Answer 11

5 months in utero

Question 12

At what age are the crowns of the incisors complete?

Answer 12

By 5 months

Question 13

When does the crown of the 1st permanent molar begin to form?

Answer 13

Birth

Question 14

When does the first deciduous molar erupt?

Answer 14

12-16 months

Question 15

By what age have all deciduous teeth erupted?

Answer 15

36 months

Question 16

At what age are the roots of all deciduous teeth fully formed?

Answer 16

3 years

Question 17

At what age is the crown of the first permanent molar complete?

Answer 17

3 years

Question 18

At what age is the crown of the permanent incisors complete?

Answer 18

4-5 years

Question 19

At what age does resorption of the roots of deciduous teeth begin?

Answer 19

5 years

Question 20

At what age does the permanent first molar erupt?

Answer 20

7-8 years

Question 21

At what age are the deciduous incisors replaced by permanent incisors?

Answer 21

6-9 years

Question 22

What is the term used to describe when both deciduous and permanent teeth are present?

Answer 22

Mixed dentition

Question 23

At what age have the roots of all erupted permanent teeth been completed?

Answer 23

14-16 years

Question 24

At what age does the 3rd molar erupt?

Answer 24

17-21 years