American Dental Association Universal Numbering System

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The American Dental Association Universal Numbering System is a tooth notation system primarily used in the United States.

Teeth are numbered from the viewpoint of the dental practitioner looking into the open mouth, clockwise starting from the distalmost right maxillary teeth.

Permanent teeth

Right maxillary

1: third molar (wisdom tooth)
2: second molar (12-year molar)
3: first molar (6-year molar)
4: second premolar (bicuspid)
5: first premolar (bicuspid)
6: canine (cuspid)
7: lateral incisor
8: central incisor

Left maxillary

9: central incisor
10: lateral incisor
11: canine (cuspid)
12: first premolar (bicuspid)
13: second premolar (bicuspid)
14: first molar (6-year molar)
15: second molar (12-year molar)
16: third molar (wisdom tooth)

Left mandibular

17: third molar (wisdom tooth)
18: second molar (12-year molar)
19: first molar (6-year molar)
20: second premolar (bicuspid)
21: first premolar (bicuspid)
22: canine (cuspid)
23: lateral incisor
24: central incisor

Right mandibular

25: central incisor
26: lateral incisor
27: canine (cuspid)
28: first premolar (bicuspid)
29: second premolar (bicuspid)
30: first molar (6-year molar)
31: second molar (12-year molar)
32: third molar (wisdom tooth)

Primary teeth