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Enamel |
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the hard, white outer layer of the tooth that forms the crown and covers and protects the dentin. |
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Dentin |
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the layer of the tooth structure just below the enamel. Dentin is more
yellow-colored than enamel and less resistant to decay and wear. |
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Pulp |
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the soft tissue filled center of a
tooth. The pulp is made up of blood vessels and nerve tissue. |
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Cementum |
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the thin, outer layer of the root. |
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TOOTH
NUMBERS AND AGE OF ERUPTION
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Tooth
Numbers |
Tooth
Name |
Age
of Eruption |
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8 & 9 |
Central Incisors |
6 - 8 years |
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7 & 10 |
Lateral
Incisors |
7 - 9 years |
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6 & 11 |
Canines
(Cuspids) |
10 - 12 years |
| 5 & 12 |
First Premolars (Bicuspids) |
10 - 11 years |
| 4 & 13 |
Second Premolars (Bicuspids) |
10 - 12 years |
| 3 & 14 |
First Molars |
6 - 7 years |
| 2 & 15 |
Second Molars |
12 - 13 years |
| 1 & 16 |
Third Molars |
17 - 21 years |
| 24 & 25 |
Central Incisors |
6
- 7 years |
| 23 & 26 |
Lateral
Incisors |
7 - 8 years |
| 22 & 27 |
Canines
(Cuspids) |
9 - 10 years |
| 21 & 28 |
First Premolars (Bicuspids) |
10 - 12 years |
| 20 & 29 |
Second Premolars (Bicuspids) |
11 - 12 years |
| 19 & 30 |
First Molars |
6 - 7 years |
| 18 & 31 |
Second Molars |
11 - 13 years |
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17 & 32 |
Third Molars |
17
- 21 years |
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