Paeds

Question 1

What is the pattern of eruption for deciduous teeth?

Answer 1

A B D C E

Question 2

When do the primary central incisors erupt?

Answer 2

6-12 months

Question 3

When do the primary central incisors shed?

Answer 3

6-7 years

Question 4

When do the primary lateral incisors erupt?

Answer 4

9-16 months

Question 5

When do the primary lateral incisors shed?

Answer 5

7-8 years

Question 6

When do the primary canines erupt?

Answer 6

16-23 months

Question 7

When do the primary canines shed?

Answer 7

9-12 years

Question 8

When do the primary first molars erupt?

Answer 8

13-18 months

Question 9

When do the primary first molars shed?

Answer 9

9-11 years

Question 10

When do the primary second molars erupt?

Answer 10

23-33 months

Question 11

When do the primary second molars shed?

Answer 11

10-12 years

Question 12

What is the general rule regarding deciduous tooth eruption?

Answer 12

Lowers before uppers except for the lateral incisors.

Question 13

How long after eruption does root formation complete?

Answer 13

1.5 years

Question 14

What is the pattern of eruption for permanent teeth?

Answer 14

Upper - 6 1 2 4 5 3 7 8

Lower - 6 1 2 3 4 5 7 8

Question 15

What is the general rule regarding permanent teeth eruption?

Answer 15

Lowers before uppers except for premolars.

Question 16

What is mixed dentition?

Answer 16

• the time from when the first permanent tooth erupts to the last primary tooth exfoliating
• usually 6-11 years

Question 17

What is the eruption date for the upper central incisor?

Answer 17

7-8 years

Question 18

What is the eruption date for the upper lateral incisor?

Answer 18

8-9 years

Question 19

What is the eruption date for the upper canine?

Answer 19

11-12 years

Question 20

What is the eruption date for the upper first premolar?

Answer 20

10-11 years

Question 21

What is the eruption date for the upper second premolar?

Answer 21

10-12 years

Question 22

What is the eruption date for the upper first molar?

Answer 22

6-7 years

Question 23

What is the eruption date for the upper second molar?

Answer 23

12-13 years

Question 24

What is the eruption date for the third molars?

Answer 24

• 17-21 years

- some do not erupt

Question 25

What is the eruption date for the lower central incisor?

Answer 25

6-7 years

Question 26

What is the eruption date for the lower lateral incisor?

Answer 26

7-8 years

Question 27

What is the eruption date for the lower canine?

Answer 27

9-10 years

Question 28

What is the eruption date for the lower first premolar?

Answer 28

10-12 years

Question 29

What is the eruption date for the lower second premolar?

Answer 29

11-12 years

Question 30

What is the eruption date for the lower first molar?

Answer 30

6-7 years

Question 31

What is the eruption date for the lower second molar?

Answer 31

11-13 years

Question 32

Describe the differences between deciduous and permanent crowns.

Answer 32

• primary incisor are smaller in both their crown and root proportions
• primary molars are wider mesiodistally than permanent premolars
• primary molar crowns are more bulbous
• primary crowns are whiter

Question 33

Describe the differences between primary and permanent roots.

Answer 33

• primary roots are narrower than permanent roots
• primary molar roots are longer and more slender than permanent roots, these primary roots also flare apically to allow room for the developing permanent premolar

Question 34

Describe the differences between primary and permanent pulps.

Answer 34

• primary pulp chambers are larger in proportion to the crown than in permanent teeth
• primary pulp horns extend higher into the crown than in permanent teeth, therefore pulpal exposure is more likely

Question 35

Describe the differences between primary and permanent root canals.

Answer 35

• primary root canals are ribbon shaped with many accessory tunnels, which makes them very difficult to clean
• permanent root canals tend to be more rounded canals

Question 36

Describe the differences between primary and permanent hard tissue.

Answer 36

• the enamel of permanent teeth is relatively thin and has a more consistent depth compared to permanent teeth §

Question 37

Describe the differences between primary and permanent occlusion.

Answer 37

• primary incisors are very upright, they come together at the incisal edge
• permanent incisors are proclined

Question 38

What is primate space?

Answer 38

Maxillary = space mesial to canine
Mandibular = space distal to the canine
- allows for mesial drift

Question 39

What is leeway space?

Answer 39

• space mesiodistal space occupied by the primary molars, as the teeth that succeed them are narrower
• 1.5mm in maxilla either side
• 2.5mm n mandible either side
• allows for the first permanent molar to drift forward

Question 40

What are the indications for a trauma splint?

Answer 40

• avulsed permanent teeth

Question 41

What are the guidelines for parents and teachers should a child’s tooth be avulsed?

Answer 41

• store in cold milk or saliva
• don’t allow the tooth to dry out
• wash for 10s if tooth has debris
• do not handle the root, only the crown
• reimplant ASAP

Question 42

How is a trauma splint placed?

Answer 42

• cut and bend enough stainless steel wire, measure the length using floss
• acid etch the avulsed tooth, and its abutments
• apply bond to the teeth
• apply composite to the crowns, avoiding the contact areas
• sink the wire into the composite
• shape and place a little composite over the wire
• cure
• smooth any rough composite and the ends of the wire

Question 43

What is a defining feature of a primary upper 1st molar?

Answer 43

• prominent mesiobuccal tubercle

- square shape

Question 44

What is a defining feature of a primary upper 2nd molar?

Answer 44

• transverse ridge which runs distobuccal-mesiopalatal

Question 45

What is a defining feature of a primary lower 1st molar?

Answer 45

• prominent mesiobuccal tubercle

- rectangular shape

Question 46

What is a defining feature of a primary lower 2nd molar?

Answer 46

• 3 buccal cusps

- distobuccal cusp is the smallest

Question 47

How are the quadrants labelled in paediatrics?

Answer 47

UR - 5
UL - 6
LL - 7
LR - 8