# Which baby tooth is letter C?

Answer: In the Universal Numbering System, primary tooth C is the primary upper right canine (primary maxillary right canine). Its FDI (ISO 3950) designation is 53 and its Palmer designation is C in the upper right quadrant. It is a canine in the upper arch with typically 1 root.

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

## Direct answer

In the Universal Numbering System, primary tooth C is the primary upper right canine (primary maxillary right canine). Its FDI (ISO 3950) designation is 53 and its Palmer designation is C in the upper right quadrant. It is a canine in the upper arch with typically 1 root.

## Query patterns

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

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