Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BDS2: Paediatric Dentistry > Primary Tooth Morphology And Chronology Of Eruption > Flashcards

Primary Tooth Morphology And Chronology Of Eruption Flashcards

1
Q

List 4 early problems that can occur in children’s mouths

A
  1. Gingival cysts (Epstein’s pearls/Bohns nodules) - appear white
  2. Congenital epulis
  3. Natal or neonatal teeth
  4. Eruption cysts - appear blue
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How is the primary dentition written using FDI notation?

A

Quadrants 5 6
7 8

Letters A B C D E used

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

When do teeth start to form?

A

During week 5 of intra-uterine life

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When does hard tissue formation begin?

A

Week 13 IUL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q 
Describe the development of the maxillary central incisor in chronological order:
•hard tissue formation
•crown complete
• eruption
•root complete
A
  1. Hard tissue formation. 13-16 weeks IUL
  2. Crown complete 1.5 months after birth
  3. Eruption 8-12 months
  4. Root complete 33 months
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Describe the development of the maxillary second primary molar in chronological order

A
  1. Hard tissue formation - 16-23 weeks IUL
  2. Crown formation complete - 11 months after birth
  3. Eruption - 25-33 months
  4. Complete root formation - 47 months
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

List the tooth crowns that are calcified at birth

A 
1/2 of primary central incisors
1/3 of primary lateral incisors
Tip of primary canines
1/2 of first primary molars
1/3 of second primary molars
Tip of cusps of first permanent molars
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

List some possible theories behind tooth eruption

A
  1. Cellular proliferation at apex of tooth
  2. Localised change in blood pressure/hydrostatic pressure
  3. Metabolic activity within the PDL
  4. Resorption of the overlying hard tissue
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How does the dental follicle appear on a radiograph?

A

Dark halo around unerupted tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What process is considered essential to the process of tooth eruption?

A

Remodelling of bone and primary tooth tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the main function of the dental follicle?

A

Follicle is activated to initiate osteoclastic activity in the alveolar bone ahead of the tooth in order to clear a path for tooth eruption

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What sequence does the primary dentition erupt in?

A
  1. Central incisor (A)
  2. Lateral incisor (B)
  3. First primary molar (D)
  4. Canine (C)
  5. Second primary molar (E)

ABDCE

(As a general rule, lowers erupt before uppers except the lateral incisors)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When does the lower central incisor erupt?

Give the FDI notation for these teeth

A
  • 4-6 months

* 81 and 71

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When does the lateral incisor erupt?

Give the FDI notation

A
  • 7-16 months

* 52, 62, 72, 82

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When do the 1st molars erupt?

Give the FDI notation

A
  • 13-19 months

* 54,64,74,84

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When do the canines erupt?

FDI notation

A
  • 16-22 months

* 53,63,73,83

17
Q

When do the second molars erupt?

A
  • 15-33 months

* 55,65,75,85

18
Q

How long does it normally take for all teeth of the same series to erupt?

A

Less than 3 months

19
Q

At what age is the primary dentition complete?

A

2.5-3 years

20
Q

Is it normal for children of 1 year to still have no erupted teeth?

A

Yes - there is huge variation in eruption dates

21
Q

What are the main differences between the crowns of primary and permanent teeth?

A
  1. Primary incisors are smaller in both crown and root proportions
  2. Primary molars are wider mesiodistally than the permanent premolars which take their place
  3. Primary molars have more bulbous crowns
  4. Primary teeth usually whiter in colour
22
Q

What is a distinguishing feature of the upper right 1st primary molar?

A

Prominent mesio buccal tubercle

23
Q

What is an anatomically important feature on the upper right second primary molar?

A

Transverse ridge

- important to preserve if possible

24
Q

What is the main distinguishing feature of the lower right second primary molar?

A

3 buccal cusps (like lower 1st permanent molar)

25
Q

What are the main differences between the roots of primary and permanent teeth?

A
  1. Roots of primary teeth tend to be narrower when compared with their permanent counterparts
  2. Roots of primary molars are longer and more slender than the roots of the permanent molars
    - these roots also tend to flare apically to allow room in between for the developing permanent tooth crowns
26
Q

What are the main differences in primary and permanent tooth pulp?

how does this effect you clinically?

A
  1. Pulp chambers of the primary teeth are relatively large in proportion to the crowns that surround them
  2. The pulp horns of primary teeth extend high occlusally
    - means pulp horns are closer to enamel than in permanent teeth
    - makes pupal exposure on cavity preparation more likely
27
Q

What is the main difference between root canals of primary and permanent teeth?

A
  1. Primary root canals tend to be ribbon shaped with multiple interconnecting and accessory canals
    - clinically impossible to clean completely
28
Q

What are the main differences in hard tissue between primary and permanent teeth?

A
  1. Enamel of primary teeth is relatively thin and has consistent depth
  2. The thickness of coronal dentine is much thinner than in permanent teeth
29
Q

Why is spacing of the primary dentition desirable?

A

Reduces the likelyhood of overcrowding in the permanent dentition

30
Q

What is meant by leeway space in the primary dentition?

A

•extra mesio distal space occupied by the primary molars which are wider than the premolars which will replace them

31
Q

How big is the leeway space on the upper and lower arches?

A

Upper: 1.5mm per side
Lower: 2.5mm per side

32
Q

In what age range does the mixed dentition stage occur?

A

6-11 years
- this varies

(Normally begins at age 6 - 1st permanent molar)

33
Q

What is normally the final primary tooth to be exfoliated from the mouth?

A

Upper primary canine

34
Q

In cases of overcrowding, what teeth are often excluded due to lack of space in the upper and lower arches?

A

Upper: canine
Lower: second premolar

35
Q

What results in an increased A-P arch length in the permenant dentition

A

Proclined permanent incisors

36
Q

What is a potential trauma risk to the permanent teeth which relates to the path of eruption?

A

Trauma risk to permanent teeth if primary incisors are displaced towards the developing central incisors which normally erupt palatally to the primary incisors

37
Q

What causes transient spacing of the developing upper 1’s, referred to as the ‘ugly duckling stage’?

A

Close proximity of roots pushes teeth outwards

- problem is self correcting once the permanent dentition is established

38
Q

How long does root formation take in the permanent dentition

A

3 years

BDS2: Paediatric Dentistry (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions