Universal Numbering System - Human Dental Chart

The Universal Numbering System is a dental notation system for associating information to a specific tooth, and is commonly used in the United States.

Left and right

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Dental charts are normally arranged from the viewpoint of a dental practitioner facing a patient. The patient's right side appears on the left side of the chart, and the patient's left side appears on the right side of the chart.

The labels "right" and "left" on the charts in this article correspond to the patient's right and left, respectively.

Universal numbering system

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Although it is named the "universal numbering system", it is also called the "American system" as it is commonly used in the United States. The uppercase letters A through T are used for primary teeth and the numbers 1 - 32 are used for permanent teeth. The tooth designated "1" is the maxillary right third molar ("wisdom tooth") and the count continues along the upper teeth to the left side. Then the count begins at the mandibular left third molar, designated number 17, and continues along the bottom teeth to the right side. Each tooth has a unique number or letter, allowing for easier use on keyboards.

Tooth Numbering

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Permanent teeth and their assigned numbers (Universal Tooth Numbering System)

       upper right  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  

       upper left  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)  

       lower left  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  

       lower right  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)  

See also

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• Dental notation
• FDI World Dental Federation notation
• Palmer Notation Method

References

source : en.wikipedia.org

External links

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• Dr. Bunn page on dental notations.

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