# Tooth #1 (FDI 18): upper right third molar (wisdom tooth)

> FDI tooth 18 is the upper right third molar (wisdom tooth) (quadrant 1): Universal #1, Palmer UR8. With neighbouring teeth and the full chart.

Source: https://hajto.de/en/tooth-chart/tooth-18  
Last updated: 2026-10-17T11:14:04Z  
German version: https://hajto.de/zahnschema/zahn-18.md

- **FDI (ISO 3950):** 18
- **Universal (ADA):** #1
- **Palmer:** 8┘ (UR8)
- **Name:** Upper right third molar (wisdom tooth)
- **Tooth type:** Third molar (wisdom tooth)
- **Group:** Posterior tooth
- **Quadrant:** Quadrant 1: upper right (maxillary right)
- **Dentition:** Permanent dentition

## Neighbouring teeth

- [Tooth 17](https://hajto.de/en/tooth-chart/tooth-17.md): upper right second molar

## Opposing tooth (same position in the opposite jaw)

- [Tooth 48](https://hajto.de/en/tooth-chart/tooth-48.md): lower right third molar (wisdom tooth)

[Interactive tooth chart](https://hajto.de/en/tooth-chart) · Reference for dentists and dental students. Notation according to the FDI two-digit system (ISO 3950) and the ADA Universal Numbering System.