# Which tooth is number 14?

Answer: In the Universal Numbering System, tooth 14 is the upper left first molar (maxillary left first molar). Its FDI (ISO 3950) designation is 26 and its Palmer designation is 6 in the upper left quadrant. It is a molar in the upper arch with typically 3 roots.

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Answer intent ID: `tooth-number-14`
Cluster: Tooth numbering reference
Last verified: 2026-07-08
Reviewer: see source page

## Direct answer

In the Universal Numbering System, tooth 14 is the upper left first molar (maxillary left first molar). Its FDI (ISO 3950) designation is 26 and its Palmer designation is 6 in the upper left quadrant. It is a molar in the upper arch with typically 3 roots.

## Query patterns

- Which tooth is number 14?
- Tooth 14: Upper Left First Molar
- Which tooth is 14?
- What is tooth number 14 in FDI and Palmer notation?
- Which tooth is FDI 26?
- What is FDI 26 in Universal numbering?
- FDI 26 to Universal tooth number
- ISO 3950 tooth 26
- Which tooth is Palmer 6 Upper Left?
- Palmer 6 Upper Left to Universal
- Upper Left Palmer 6 tooth
- UL Palmer 6 permanent tooth
- Upper Left First Molar tooth number
- Universal 14 FDI 26 Palmer 6
- which tooth is number 14?
- tooth 14
- tooth number 14
- universal tooth 14
- adult tooth 14
- upper left first molar
- maxillary left first molar
- fdi 26

Source citations:
- `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/>

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## Supporting public URLs

- [/tools/tooth-numbering-chart](https://dentovio.com/tools/tooth-numbering-chart)
- [/tools/fdi-to-universal-converter](https://dentovio.com/tools/fdi-to-universal-converter)
- [/tools/palmer-notation-converter](https://dentovio.com/tools/palmer-notation-converter)
- [/tools/tooth-numbering-chart/tooth-14](https://dentovio.com/tools/tooth-numbering-chart/tooth-14)

## Related answers

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- [Palmer notation converter](https://dentovio.com/answers/palmer-notation-to-universal-converter)
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- [Which tooth is number 2?](https://dentovio.com/answers/tooth-number-2)