Dates Flashcards
1
Q
Eruption dates
Permanent
A
6-7 = All 6's , Lower 1s 7-8 = Lower 2's , Upper 1s 8-9 = upper 2s 9-10 = Lower 3s 10-11 = Upper 4s 10-12 = Lower 4s, Upper 5s 11-12 = Upper 3s , Lower 5s 11-13 = Lower 7s 12-13 = Upper 7s
2
Q
Root completion
permanent
A
9= Lower 1s 9-10 = All 6s 10 = Lower 2s, Upper 1s 11= Upper 2s 12-13= All 4s 12-14 = Lower 3s, Upper 5s 13-14 = Lower 5s 13-15= Upper 3s 14-15= Lower 7s 14-16 = Upper 7s
3
Q
Crown completion
permanent
A
2.5-3 = Upper 6s 3-4 = Lower 6s 4-5 = All incisors 5-6 = All 4s 5.5-6.5 = Lower 3s 6-7 = Upper 3s, All 5s 7-8 = All 2nd molars
4
Q
Initial calcification
permanent
A
Birth = All 6s 3-4 months = all 1s and lower 2s 4-5 months = all 3s 10-12 months = upper 2s 18-21 months = upper 4s 1.5-2 years = lower 4s 2-2.5 years = upper 5s 2.25-2.5 years = lower 5s 2.5-3 years = all 7s
