Tooth development Flashcards
1
Q
Primary upper teeth eruption (months)
A
Central incisor (a): 8-12 months Lateral incisor (b): 9-13 months First molar (d): 13-19 months Canine (cuspid c): 16-22 months Second molar (e): 25-33 months
2
Q
Primary upper teeth shedding (years)
A
Central incisor (a): 6-7 years Lateral incisor (b): 7-8 years First molar (d): 9-11 years Canine (cuspid c): 10-12 years Second molar (e): 10-12 years
3
Q
Primary lower teeth eruption (months)
A
Central incisor (a): 6-10 months Lateral incisor (b): 10-16 months First molar (d): 14-18 months Canine (cuspid c): 17-23 months Second molar (e): 31-33 months
4
Q
Primary lower teeth shedding (years)
A
Central incisor (a): 6-7 years Lateral incisor (b): 7-8 years First molar (d): 9-11 years Canine (cuspid c): 9-12 years Second molar (e): 10-12 years
5
Q
Secondary upper teeth eruption (years)
A
First molar (6): 6-7 years Central incisor (1): 7-8 years Lateral incisor (2): 8-9 years First premolar (4): 10-11 years Second premolar (5): 10-12 years Canine (3): 11- 12 years Second molar (7): 12-13 years Third molar (8): 17-21 years
6
Q
Secondary lower teeth eruption (years)
A
First molar (6): 6-7 years Central incisor (1): 6-7 years Lateral incisor (2): 7-8 years Canine (3): 9-10 years First premolar (4): 10-12 years Second premolar (5): 11-12 years Second molar (7): 11-13 years Third molar (8): 17-21 years
7
Q
How long do primary teeth take to form
A
Crown formation takes 12 months
Root formation takes 18 months
Overall 30 months
8
Q
How long do secondary teeth take to form
A
Crown formation takes 3 years
Root formation takes 6 years
Overall 9 years
9
Q
If permanent canines present, what age?
A
Must be over 10 (~12)
10
Q
What age do permanent teeth start erupting
A
~6
11
Q
Which erupts first, lowers or uppers
A
Lowers
12
Q
When should final upper Es erupt
A
~29 months
13
Q
Which tooth germs are not fully formed before birth
A
7 & 8
