# Which tooth is number 29?

Answer: In the Universal Numbering System, tooth 29 is the lower right second premolar (mandibular right second premolar). Its FDI (ISO 3950) designation is 45 and its Palmer designation is 5 in the lower right quadrant. It is a premolar in the lower arch with typically 1 root.

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Answer intent ID: `tooth-number-29`
Cluster: Tooth numbering reference
Last verified: 2026-07-08
Reviewer: see source page

## Direct answer

In the Universal Numbering System, tooth 29 is the lower right second premolar (mandibular right second premolar). Its FDI (ISO 3950) designation is 45 and its Palmer designation is 5 in the lower right quadrant. It is a premolar in the lower arch with typically 1 root.

## Query patterns

- Which tooth is number 29?
- Tooth 29: Lower Right Second Premolar
- Which tooth is 29?
- What is tooth number 29 in FDI and Palmer notation?
- Which tooth is FDI 45?
- What is FDI 45 in Universal numbering?
- FDI 45 to Universal tooth number
- ISO 3950 tooth 45
- Which tooth is Palmer 5 Lower Right?
- Palmer 5 Lower Right to Universal
- Lower Right Palmer 5 tooth
- LR Palmer 5 permanent tooth
- Lower Right Second Premolar tooth number
- Universal 29 FDI 45 Palmer 5
- which tooth is number 29?
- tooth 29
- tooth number 29
- universal tooth 29
- adult tooth 29
- lower right second premolar
- mandibular right second premolar
- fdi 45

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-29](https://dentovio.com/tools/tooth-numbering-chart/tooth-29)

## 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)