# Tooth #13 (FDI 25): upper left second premolar

> FDI tooth 25 is the upper left second premolar (quadrant 2): Universal #13, Palmer UL5. With neighbouring teeth and the full chart.

Source: https://hajto.de/en/tooth-chart/tooth-25  
Last updated: 2026-10-17T11:14:06Z  
German version: https://hajto.de/zahnschema/zahn-25.md

- **FDI (ISO 3950):** 25
- **Universal (ADA):** #13
- **Palmer:** └5 (UL5)
- **Name:** Upper left second premolar
- **Tooth type:** Second premolar
- **Group:** Posterior tooth
- **Quadrant:** Quadrant 2: upper left (maxillary left)
- **Dentition:** Permanent dentition

## Neighbouring teeth

- [Tooth 24](https://hajto.de/en/tooth-chart/tooth-24.md): upper left first premolar
- [Tooth 26](https://hajto.de/en/tooth-chart/tooth-26.md): upper left first molar

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

- [Tooth 35](https://hajto.de/en/tooth-chart/tooth-35.md): lower left second premolar

[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.