dental chronology Flashcards
1
Q
in what order does the deciduous dentition erupt in?
A
abdce
c before d to stabilise the dentition
2
Q
at what ages and order does the deciduous dentition erupt in?
A
lower a - 6months upper a - 7months lower b - 7months upper b - 8months ds - 12-16m cs - 16-20months e - 30months
3
Q
when are the deciduous roots formed by?
A
1 - 1 and a half years after eruption
4
Q
when are the deciduous crowns completed?
A
a's - 4months b's - 4 and a half to 5 months c's - 9months d's - 6months e's - 10-12 months
5
Q
how late can a’s erupt?
A
1 year old
6
Q
what is the pattern of eruption for the upper permanent teeth?
lower?
A
Upper - 61245378
Lower - 61234578
7
Q
what age does the permanent dentition begin erupting?
A
6 years
8
Q
what are the ages that the permanent dentition erupt in?
A
6's - 6-7 years lower 1's - 7 years lower 2's - 7-8 years upper 1's 7-8 years upper 2's - 8-9 years lower 3's 9-10 years 4's 10-12 years 5's 10-12 years upper 3's 11-12 years 7's - 12-13 years 8's - 17-21 years
9
Q
when do the 6’s calcify?
7’s?
8’s?
rest of dentition?
A
calcify around birth
2 and a half to 3 years
7-10 years
rest - 1st 2 years
10
Q
when do the permanent roots complete?
A
2-3 years after eruption
11
Q
why might delayed eruption be caused?
A
downs syndrome trauma - delayed deciduous resorption dilaceration supernumeraries impaction crowding congenital absence
