Pediatric Dentistry

Question 1

Name the problem of prior to eruption

Answer 1

Gingival Cysts

Question 2

What is the other name of Gingival Cysts?

Answer 2

Epstein’s pearls/Bohns Nodules

Question 3

Name the problem of prior to eruption

Answer 3

Congenital Epulis

Question 4

Name the problem of prior to eruption

Answer 4

Natal or Neonatal teeth

Question 5

Name the problem of prior to eruption

Answer 5

Eruption Cysts

Question 6

Natal or Neonatal teeth require no treatment unless?

Answer 6

• Causing ulceration
• Affecting mother during feeding
• Mobile - Choking hazard

Question 7

Upper right second primary molar in FDI notation

Answer 7

55

Question 8

When teeth start formation in intrauterine life (i.u.l)?

Answer 8

Week 5

Question 9

How we can detect the formation of hard tissue in week 15?

Answer 9

ultrasound scans

Question 10

What lead to Enamel defects during calcification?

Answer 10

Systemic disturbances

Question 11

What cause defects in the primary dentition?

Answer 11

Difficult pregnancy for the mother or
complications at birth.

Question 12

Possible theories behind tooth eruption

Answer 12

• Cellular proliferation at apex
• Localized change in blood/hydrostatic pressure
• Metabolic activity in PDL
• Resorption of overlying hard tissue

Question 13

What erupt first upper or lower tooth?

Answer 13

Lower teeth erupt before upper (Except lateral incisors)

Question 14

Eruption sequence

Answer 14

A (4-6) → B (7-16) → D (13-19) → C (16-22) → E (15-33) - (in months)
A,B,D,C,E→ 1,2,4,3,5

Question 15

When the primary dentition completed?

Answer 15

2.5-3 years of age

Question 16

How long it takes for the tooth in the same series to erupt?

Answer 16

within 3 months of their contra lateral tooth

Question 17

Mention the key differences between Primary vs Permanent (Crowns)

Answer 17

• Primary incisor has a smaller crown and root
• Primary molars are wider mesiodistally
• Primary molar crowns are more bulbous
• Primary teeth are whiter in colour

Question 18

Why primary teeth are whiter in colour?

Answer 18

because the enamel and dentine is thinner

Question 19

What is in common between upper and lower 1st primary molar?

Answer 19

Prominent mesiobuccal tubercle

Question 20

What tooth does the picture show and what the arrow indicate?

Answer 20

Tooth- Upper Right 2nd Primary Molar
Arrow- Transverse Ridge

Question 21

Mention the key differences between Primary vs Permanent (Roots)

Answer 21

Primary roots are:
- Narrower compared to permanent teeth
- Primary molar roots are longer & slender
- Tend to flare apically to allow room for developing permanent crowns

Question 22

Mention the key differences between Primary vs Permanent (Pulp)

Answer 22

Primary pulp:
- Chambers are large in proportion to surrounding crown
- Pulp horns extend high & closer to enamel → pulpal exposure is more likely

Question 23

Why pulp exposure is more likely in primary teeth?

Answer 23

because pulp horns in primary teeth extend high & closer to enamel

Question 24

Mention the key differences between Primary vs Permanent (root canal)

Answer 24

Primary root canals are:
- Ribbon shaped
- Multiple interconnecting and accessory canals
- Impossible to clean clinically

Question 25

Mention the key differences between Primary vs Permanent (root canal)

Answer 25

• Primary coronal dentine → much thinner
• Primary enamel is relatively thin and consistent in depth

Question 26

Mention the difference between Primary vs Permanent (root canal)

Answer 26

Anterior spacing present in primary dentition → This is desired as it helps to avoid crowding in permanent dentition

Question 27

What is the benefit if anterior spacing that present in primary dentition?

Answer 27

This is desired as it helps to avoid crowding in permanent dentition

Question 28

What is anthropoid (Primate) spacing?

Answer 28

• Space mesial to upper deciduous canine
• Space distal to lower deciduous canine

Question 29

What is leeway space?

Answer 29

Extra mesio-distal space occupied
by the primary molars which are wider than the premolars which will replace them.

Question 30

How much leeway space ?

Answer 30

1.5mm per side on the upper arch and 2.5mm per side in the lower arch, due to primary molar being wider than premolars that will replace them

Question 31

The mixed dentition stage

Answer 31

Between 6 and 11 years

Question 32

Eruption sequence of permanent teeth of the upper arch

Answer 32

1st permanent molars & then front to back EXCEPT canines.
6, 1, 2, 4, 5, {3}, 7, 8.

Question 33

Eruption sequence of permanent teeth of the lower arch

Answer 33

1st permanent molars & then front to back.
6, 1, 2, 3, 4, 5, 7, 8.

Question 34

Crowding in the upper arch usually leads to?

Answer 34

Exclusion of the upper canine, so it will erupt at 11

Question 35

Crowding in the lower arch usually leads to?

Answer 35

Lack of space for the second premolar. The upper premolar will erupt first {exception}

Question 36

How do deciduous and permanent incisors look?

Answer 36

It is upright in deciduous teeth and proclined in the permanent which leads to an increase in A-P arch length

Question 37

Explain the eruption path for permanent incisors

Answer 37

Permanent incisors develop palatal to primary incisors.

Question 38

What is ‘Ugly Duckling stage’?

Answer 38

• Transient spacing of upper 1’s
• Due to close proximity of roots to erupting 2’s and 3’s

Question 39

How many years it takes to complete apexogenesis of permanent tooth root?

Answer 39

3 years for permanent tooth and 1.5 for primary dentition