# Tooth #4 (FDI 15): upper right second premolar

> FDI tooth 15 is the upper right second premolar (quadrant 1): Universal #4, Palmer UR5. With neighbouring teeth and the full chart.

Source: https://hajto.de/en/tooth-chart/tooth-15  
Last updated: 2026-10-17T11:14:49Z  
German version: https://hajto.de/zahnschema/zahn-15.md

- **FDI (ISO 3950):** 15
- **Universal (ADA):** #4
- **Palmer:** 5┘ (UR5)
- **Name:** Upper right second premolar
- **Tooth type:** Second premolar
- **Group:** Posterior tooth
- **Quadrant:** Quadrant 1: upper right (maxillary right)
- **Dentition:** Permanent dentition

## Neighbouring teeth

- [Tooth 14](https://hajto.de/en/tooth-chart/tooth-14.md): upper right first premolar
- [Tooth 16](https://hajto.de/en/tooth-chart/tooth-16.md): upper right first molar

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

- [Tooth 45](https://hajto.de/en/tooth-chart/tooth-45.md): lower right 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.