PAEDIATRIC PREP Flashcards
what is the general rule of eruption of primary teeth?
lowers erupt before uppers
what is the seuqence of eruption of primary teeth?
A B D C E
when do upper central primary incisors erupt?
8-12 months
when do lower lateral primary incisors erupt?
6-10 months
when do upper primary first molars erupt?
13-19 month
when do lower primary first molars erupt?
14-18 months
when do upper primary canines erupt?
16-22 months
when do lower primary canines erupt?
17-23 months
when do upper primary second molars erupt?
25-33 months
when do upper primary canines erupt?
when do lower primary second molars erupt?
23-31 months
how does the morphology of primary teeth differ to permanent teeth as a general rule?
- smaller crown
- smaller root length
- narrower roots
- whiter in colour
- large pulp chambers that sit occlusally
what morphological feature can typically be found on primary upper and lower first molars?
prominant mesiobuccal tubercle
what specific morphological feature can typically be found on primary upper second molars?
transverse ridge
what specific morphological feature can typically be found on primary lower second molars?
three buccal cusps
what is the mixed dentition defined as?
the mixed dentition stage begins from the time the first permanent tooth erupts until the exfoliation of the last primary tooth.
what ages (usually) does the mixed dentition exist between?
between 6 - 11 years of age
what is the eruption sequence for the upper arch of the permanent dentition?
6 1 2 4 5 3 7 8
what is the eruption sequence for the lower arch of the permanent dentition?
6 1 2 3 4 5 7 8
what permanent teeth would you expect to be present in a 6 year old child?
- upper & lower first molars
- lower central incisor
what permanent teeth would you expect to be present in a 7 year old child?
- both first molars
- lower central incisor
- upper central incisor
- lower lateral incisor
what permanent teeth would you expect to be present in an 8 year old child?
- both first molars
- both central incisors
- both lateral incisors
what permanent teeth would you expect to see in a 9 year old child?
- both first molars
- both central incisors
- both lateral incisors
- lower canine
what permanent teeth would you expect to see in a 10 year old child?
- both first molars
- both central incisors
- both lateral incisors
- lower canine
- both first premolars
what permanent teeth would you expect to see in a 10 and a half year old child?
- both first molars
- both central incisors
- both lateral incisors
- lower canine
- both first premolars
- upper second premolar
what permanent teeth would you expect to see in an 11 year old child (approx)?
- both first molars
- both central incisors
- both lateral incisors
- both canines
- both second premolars
- lower second molar
what permanent teeth would you expect to see in a 12 year old child?
- both first molars
- both central incisors
- both lateral incisors
- both canines
- both second premolars
- both second molars
at what age (roughly) would you expect third molars to erupt in a child?
17 years old
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?
6 years old
