Identifying your teeth involves understanding the naming system used by dentists. The most common system in the United States is the Universal Numbering System.
Understanding the Universal Numbering System
The Universal Numbering System assigns a unique number to each tooth in the adult mouth, ranging from 1 to 32.
How it Works:
- Starting Point: The numbering begins with the upper-right third molar (wisdom tooth).
- Direction: You count sequentially towards the front teeth (central incisors).
- Upper Arch: Continue counting across the upper arch to the upper-left third molar. The upper-left third molar is number 16.
- Lower Arch: After reaching number 16, drop down to the lower-left third molar, which is number 17.
- Completion: Continue counting across the lower arch to the lower-right third molar, which is number 32.
Visual Representation:
Here's a table summarizing the tooth numbering:
Tooth Number | Tooth Name | Location |
---|---|---|
1 | Upper Right Third Molar | Upper Right, Back |
2 - 7 | Other Upper Right Teeth | Upper Right |
8 | Upper Right Central Incisor | Upper Right, Front |
9 | Upper Left Central Incisor | Upper Left, Front |
10-15 | Other Upper Left Teeth | Upper Left |
16 | Upper Left Third Molar | Upper Left, Back |
17 | Lower Left Third Molar | Lower Left, Back |
18-23 | Other Lower Left Teeth | Lower Left |
24 | Lower Left Central Incisor | Lower Left, Front |
25 | Lower Right Central Incisor | Lower Right, Front |
26-31 | Other Lower Right Teeth | Lower Right |
32 | Lower Right Third Molar | Lower Right, Back |
Example:
If your dentist refers to tooth #30, they are talking about one of your lower right molars. If the dentist mention tooth #8, they are talking about your upper right central incisor.
Why is this Important?
This numbering system allows for clear communication between dental professionals, ensuring everyone understands which tooth is being discussed. If you understand the system, you can better understand your dental treatment plan.