Calcification dates (Primary dentition)

Hard Tissue Formation Begins: primary max central incisor

4 mo in utero

Hard Tissue Formation Begins: primary max lateral incisor

4 1/2 mo in uteri

Hard Tissue Formation Begins: primary max canine

5 mo in utero

Hard Tissue Formation Begins: primary max 1st molar

5 mo in utero

Hard Tissue Formation Begins: primary max 2nd molar

6 mo in utero

Hard Tissue Formation Begins: primary mand central incisor

4 1/2 mo in utero

Hard Tissue Formation Begins: primary mand lateral incisor

4 1/2 mo in utero

Hard Tissue Formation Begins: primary mand canine

5 mo in utero

Hard Tissue Formation Begins: primary mand 1st molar

5 mo in utero

Hard Tissue Formation Begins: primary mand 2nd molar

6 mo in utero

Crown completed: primary max central incisor

4 mo

Crown completed: primary max lateral incisor

5 mo

Crown completed: primary max canine

9 mo

Crown completed: primary max 1st molar

6 mo

Crown completed: primary max 2nd molar

11 mo

Crown completed: primary mand central incisor

3 1/2 mo

Crown completed: primary mand lateral incisor

4 mo

Crown completed: primary mand canine

9 mo

Crown completed: primary mand 1st molar

5 1/2 mo

Crown completed: primary mand 2nd molar

10 mo

Eruption: primary max central incisor

7 1/2 mo

Eruption: primary max lateral incisor

9 mo

Eruption: primary max canine

18-19 mo

Eruption: primary max 1st molar

14 mo

Eruption: primary max 2nd molar

24 mo

Eruption: primary mand central incisor

6 mo

Eruption: primary mand lateral incisor

7 mo

Eruption: primary mand canine

16 mo

Eruption: primary mand 1st molar

12 mo

Eruption: primary mand 2nd molar

20 mo

Root completed: primary max central incisor

1 1/2 years

Root completed: primary max lateral incisor

2 yr

Root completed: primary max canine

3 1/4 yr

Root completed: primary max 1st molar

2 1/2 yr

Root completed: primary max 2nd molar

3 yr

Root completed: primary mand central incisor

1 1/2 yr

Root completed: primary mand lateral incisor

1 1/2 yr

Root completed: primary mand canine

3 yr

Root completed: primary mand 1st molar

2 1/4 yr

Root completed: primary mand 2nd molar

3 yr

Which teeth have begun to calcify before birth?

All primary teeth

Which teeth begin to calcify at birth?

First permanent molars

Permanent crowns begin to calcify when?

5-6 years before eruption

Permanent crowns are complete when?

3-5 years before eruption

Permanent roots are complete when?

2-3 years after eruption

Primary roots are complete by...

Age 3

Within _________ years of root completion, the roots begin to resorb

3

Where are primate spaces seen?

Primary dentition only

Maxillary: between laterals and canines

Mandibular: between canines and molars

Where are leeway spaces seen?

Mixed dentition

Leeway spaces

Premolars are smaller M-D than the primary teeth they replace, this space is used as the remaining permanent teeth erupt