# Tooth 27: Lower Right Canine

> In the Universal Numbering System, tooth 27 is the lower right canine (mandibular right canine). Its FDI (ISO 3950) designation is 43 and its Palmer designation is 3 in the lower right quadrant. It is a canine in the lower 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 27? In the Universal Numbering System, tooth 27 is the lower right canine (mandibular right canine). Its FDI (ISO 3950) designation is 43 and its Palmer designation is 3 in the lower right quadrant. It is a canine in the lower arch with typically 1 root.
- Universal number: 27
- FDI / ISO 3950 designation: 43
- Palmer designation: 3 LR
- Plain-language name: Lower Right Canine
- Anatomical name: Mandibular Right Canine
- Quadrant: Lower Right
- Arch and side: lower, right
- Type: canine
- Typical roots: 1

## Conversion table

| System | Designation |
| --- | --- |
| Universal Numbering System | 27 |
| FDI / ISO 3950 | 43 |
| Palmer notation | 3 LR |
| Tooth name | Lower Right Canine |

## Search terms

- which tooth is number 27?
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- mandibular right canine
- fdi 43
- palmer 3
- lower right tooth 3
- lower right canine

## 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 26: Lower Right Lateral Incisor](https://dentovio.com/tools/tooth-numbering-chart/tooth-26/index.html.md)
- [Next tooth: Tooth 28: Lower Right First Premolar](https://dentovio.com/tools/tooth-numbering-chart/tooth-28/index.html.md)