PAEDIATRIC PREP

Question 1

what is the general rule of eruption of primary teeth?

Answer 1

lowers erupt before uppers

Question 2

what is the seuqence of eruption of primary teeth?

Answer 2

A B D C E

Question 3

when do upper central primary incisors erupt?

Answer 3

8-12 months

Question 4

when do lower lateral primary incisors erupt?

Answer 4

6-10 months

Question 5

when do upper primary first molars erupt?

Answer 5

13-19 month

Question 6

when do lower primary first molars erupt?

Answer 6

14-18 months

Question 7

when do upper primary canines erupt?

Answer 7

16-22 months

Question 8

when do lower primary canines erupt?

Answer 8

17-23 months

Question 9

when do upper primary second molars erupt?

Answer 9

25-33 months

Question 10

when do upper primary canines erupt?

Question 11

when do lower primary second molars erupt?

Answer 11

23-31 months

Question 12

how does the morphology of primary teeth differ to permanent teeth as a general rule?

Answer 12

• smaller crown
• smaller root length
• narrower roots
• whiter in colour
• large pulp chambers that sit occlusally

Question 13

what morphological feature can typically be found on primary upper and lower first molars?

Answer 13

prominant mesiobuccal tubercle

Question 14

what specific morphological feature can typically be found on primary upper second molars?

Answer 14

transverse ridge

Question 15

what specific morphological feature can typically be found on primary lower second molars?

Answer 15

three buccal cusps

Question 16

what is the mixed dentition defined as?

Answer 16

the mixed dentition stage begins from the time the first permanent tooth erupts until the exfoliation of the last primary tooth.

Question 17

what ages (usually) does the mixed dentition exist between?

Answer 17

between 6 - 11 years of age

Question 18

what is the eruption sequence for the upper arch of the permanent dentition?

Answer 18

6 1 2 4 5 3 7 8

Question 19

what is the eruption sequence for the lower arch of the permanent dentition?

Answer 19

6 1 2 3 4 5 7 8

Question 20

what permanent teeth would you expect to be present in a 6 year old child?

Answer 20

• upper & lower first molars

- lower central incisor

Question 21

what permanent teeth would you expect to be present in a 7 year old child?

Answer 21

• both first molars
• lower central incisor
• upper central incisor
• lower lateral incisor

Question 22

what permanent teeth would you expect to be present in an 8 year old child?

Answer 22

• both first molars
• both central incisors
• both lateral incisors

Question 23

what permanent teeth would you expect to see in a 9 year old child?

Answer 23

• both first molars
• both central incisors
• both lateral incisors
• lower canine

Question 24

what permanent teeth would you expect to see in a 10 year old child?

Answer 24

• both first molars
• both central incisors
• both lateral incisors
• lower canine
• both first premolars

Question 25

what permanent teeth would you expect to see in a 10 and a half year old child?

Answer 25

• both first molars
• both central incisors
• both lateral incisors
• lower canine
• both first premolars
• upper second premolar

Question 26

what permanent teeth would you expect to see in an 11 year old child (approx)?

Answer 26

• both first molars
• both central incisors
• both lateral incisors
• both canines
• both second premolars
• lower second molar

Question 27

what permanent teeth would you expect to see in a 12 year old child?

Answer 27

• both first molars
• both central incisors
• both lateral incisors
• both canines
• both second premolars
• both second molars

Question 28

at what age (roughly) would you expect third molars to erupt in a child?

Answer 28

17 years old

Question 29

a child comes into the surgery, on examination you can see that they have both first molars and their lower central incisors, what age are they roughly?

Answer 29

6 years old