# Tooth 7: Upper Right Lateral Incisor

> In the Universal Numbering System, tooth 7 is the upper right lateral incisor (maxillary right lateral incisor). Its FDI (ISO 3950) designation is 12 and its Palmer designation is 2 in the upper right quadrant. It is a incisor in the upper arch with typically 1 root.

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Last verified: 2026-07-08

Neutral tooth-designation reference only; not clinical, diagnostic, or treatment advice. Root counts describe typical permanent-tooth morphology and vary between individuals.

## Direct answer

- Which tooth is number 7? In the Universal Numbering System, tooth 7 is the upper right lateral incisor (maxillary right lateral incisor). Its FDI (ISO 3950) designation is 12 and its Palmer designation is 2 in the upper right quadrant. It is a incisor in the upper arch with typically 1 root.
- Universal number: 7
- FDI / ISO 3950 designation: 12
- Palmer designation: 2 UR
- Plain-language name: Upper Right Lateral Incisor
- Anatomical name: Maxillary Right Lateral Incisor
- Quadrant: Upper Right
- Arch and side: upper, right
- Type: incisor
- Typical roots: 1

## Conversion table

| System | Designation |
| --- | --- |
| Universal Numbering System | 7 |
| FDI / ISO 3950 | 12 |
| Palmer notation | 2 UR |
| Tooth name | Upper Right Lateral Incisor |

## Search terms

- which tooth is number 7?
- tooth 7
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- upper right lateral incisor
- maxillary right lateral incisor
- fdi 12
- palmer 2
- upper right tooth 2
- upper right incisor

## Sources

- `TOOTH-1` American Dental Association — Universal Numbering System. <https://www.ada.org/publications/ada-news/2020/november/how-to-count-teeth-numbering-systems>
- `TOOTH-2` ISO 3950:2016 — Dentistry, designation system for teeth and areas of the oral cavity (FDI two-digit). <https://www.iso.org/standard/68292.html>
- `TOOTH-3` FDI World Dental Federation — two-digit notation. <https://www.fdiworlddental.org/>

## Related

- [Full tooth numbering chart](https://dentovio.com/tools/tooth-numbering-chart/index.html.md)
- [FDI to Universal converter](https://dentovio.com/tools/fdi-to-universal-converter/index.html.md)
- [Palmer notation converter](https://dentovio.com/tools/palmer-notation-converter/index.html.md)
- [Previous tooth: Tooth 6: Upper Right Canine](https://dentovio.com/tools/tooth-numbering-chart/tooth-6/index.html.md)
- [Next tooth: Tooth 8: Upper Right Central Incisor](https://dentovio.com/tools/tooth-numbering-chart/tooth-8/index.html.md)