Paeds Flashcards
What is the pattern of eruption for deciduous teeth?
A B D C E
When do the primary central incisors erupt?
6-12 months
When do the primary central incisors shed?
6-7 years
When do the primary lateral incisors erupt?
9-16 months
When do the primary lateral incisors shed?
7-8 years
When do the primary canines erupt?
16-23 months
When do the primary canines shed?
9-12 years
When do the primary first molars erupt?
13-18 months
When do the primary first molars shed?
9-11 years
When do the primary second molars erupt?
23-33 months
When do the primary second molars shed?
10-12 years
What is the general rule regarding deciduous tooth eruption?
Lowers before uppers except for the lateral incisors.
How long after eruption does root formation complete?
1.5 years
What is the pattern of eruption for permanent teeth?
Upper - 6 1 2 4 5 3 7 8
Lower - 6 1 2 3 4 5 7 8
What is the general rule regarding permanent teeth eruption?
Lowers before uppers except for premolars.
What is mixed dentition?
- the time from when the first permanent tooth erupts to the last primary tooth exfoliating
- usually 6-11 years
What is the eruption date for the upper central incisor?
7-8 years
What is the eruption date for the upper lateral incisor?
8-9 years
What is the eruption date for the upper canine?
11-12 years
What is the eruption date for the upper first premolar?
10-11 years
What is the eruption date for the upper second premolar?
10-12 years
What is the eruption date for the upper first molar?
6-7 years
What is the eruption date for the upper second molar?
12-13 years
What is the eruption date for the third molars?
- 17-21 years
- some do not erupt
What is the eruption date for the lower central incisor?
6-7 years
What is the eruption date for the lower lateral incisor?
7-8 years
What is the eruption date for the lower canine?
9-10 years
What is the eruption date for the lower first premolar?
10-12 years
What is the eruption date for the lower second premolar?
11-12 years
What is the eruption date for the lower first molar?
6-7 years
What is the eruption date for the lower second molar?
11-13 years
Describe the differences between deciduous and permanent crowns.
- 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
Describe the differences between primary and permanent roots.
- 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
Describe the differences between primary and permanent pulps.
- 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
Describe the differences between primary and permanent root canals.
- 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
Describe the differences between primary and permanent hard tissue.
- the enamel of permanent teeth is relatively thin and has a more consistent depth compared to permanent teeth §
Describe the differences between primary and permanent occlusion.
- primary incisors are very upright, they come together at the incisal edge
- permanent incisors are proclined
What is primate space?
Maxillary = space mesial to canine
Mandibular = space distal to the canine
- allows for mesial drift
What is leeway space?
- 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
What are the indications for a trauma splint?
- avulsed permanent teeth
What are the guidelines for parents and teachers should a child’s tooth be avulsed?
- 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
How is a trauma splint placed?
- 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
What is a defining feature of a primary upper 1st molar?
- prominent mesiobuccal tubercle
- square shape
What is a defining feature of a primary upper 2nd molar?
- transverse ridge which runs distobuccal-mesiopalatal
What is a defining feature of a primary lower 1st molar?
- prominent mesiobuccal tubercle
- rectangular shape
What is a defining feature of a primary lower 2nd molar?
- 3 buccal cusps
- distobuccal cusp is the smallest
How are the quadrants labelled in paediatrics?
UR - 5
UL - 6
LL - 7
LR - 8
