# Tooth 10: Upper Left Lateral Incisor

> In the Universal Numbering System, tooth 10 is the upper left lateral incisor (maxillary left lateral incisor). Its FDI (ISO 3950) designation is 22 and its Palmer designation is 2 in the upper left 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 10? In the Universal Numbering System, tooth 10 is the upper left lateral incisor (maxillary left lateral incisor). Its FDI (ISO 3950) designation is 22 and its Palmer designation is 2 in the upper left quadrant. It is a incisor in the upper arch with typically 1 root.
- Universal number: 10
- FDI / ISO 3950 designation: 22
- Palmer designation: 2 UL
- Plain-language name: Upper Left Lateral Incisor
- Anatomical name: Maxillary Left Lateral Incisor
- Quadrant: Upper Left
- Arch and side: upper, left
- Type: incisor
- Typical roots: 1

## Conversion table

| System | Designation |
| --- | --- |
| Universal Numbering System | 10 |
| FDI / ISO 3950 | 22 |
| Palmer notation | 2 UL |
| Tooth name | Upper Left Lateral Incisor |

## Search terms

- which tooth is number 10?
- tooth 10
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- upper left lateral incisor
- maxillary left lateral incisor
- fdi 22
- palmer 2
- upper left tooth 2
- upper left 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 9: Upper Left Central Incisor](https://dentovio.com/tools/tooth-numbering-chart/tooth-9/index.html.md)
- [Next tooth: Tooth 11: Upper Left Canine](https://dentovio.com/tools/tooth-numbering-chart/tooth-11/index.html.md)