 Overview
The American Dental Association
recognizes two major systems used for
numbering teeth. The Universal/National
System is used primarily in the United
States and the International Standards
Organization System is used in most other
countries.
The Universal/National System for permanent
(adult) dentition (1-32) includes:
(1) is the patient's upper right molar
and follows around the upper arch to
the upper left third molar (16), descending
to the lower left third molar (17) and
follows around the lower arch to the
lower right third molar (32).
The Universal/National System order for
the primary (baby) dentition is the same
as described for the permanent dentition,
however, the primary teeth are designated
by upper case letters A through T, with
A being the patient's upper right second
primary molar and T being the lower right
second primary molar.
Source: American Dental Association "Current
Dental Terminology Third Edition (CDT-3)" (c)
1999.
The Permanent Arch
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1. 3rd Molar
(wisdom tooth)
2. 2nd Molar (12-yr molar)
3. 1st Molar (6-yr molar)
4. 2nd Bicuspid (2nd premolar)
5. 1st Bicuspid (1st premolar)
6. Cuspid (canine/eye tooth)
7. Lateral incisor
8. Central incisor
9. Central incisor
10. Lateral incisor
11. Cuspid (canine/eye tooth)
12. 1st Bicuspid (1st premolar)
13. 2nd Bicuspid (2nd premolar)
14. 1st Molar (6-yr molar)
15. 2nd Molar (12-yr molar)
16. 3rd Molar (wisdom tooth)
17. 3rd Molar (wisdom tooth)
18. 2nd Molar (12-yr molar)
19. 1st Molar (6-yr molar)
20. 2nd Bicuspid (2nd premolar)
21. 1st Bicuspid (1st premolar)
22. Cuspid (canine/eye tooth)
23. Lateral incisor
24. Central incisor
25. Central incisor
26. Lateral incisor
27. Cuspid (canine/eye tooth)
28. 1st Bicuspid (1st premolar)
29. 2nd Bicuspid (2nd premolar)
30. 1st Molar (6-yr molar)
31. 2nd Molar (12-yr molar)
32. 3rd Molar (wisdom tooth)
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Source: American Dental
Association "Current Dental Terminology
Third Edition (CDT-3)" (c) 1999.
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Please note: The ADA does not provide specific answers
to individual questions about fees, dental problems, conditions, diagnoses,
treatments or proposed treatments, or requests for research. Information about
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Asked Questions page for answers to common questions.
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