# Tooth #15 (FDI 27): upper left second molar

> FDI tooth 27 is the upper left second molar (quadrant 2): Universal #15, Palmer UL7. With neighbouring teeth and the full chart.

Source: https://hajto.de/en/tooth-chart/tooth-27  
Last updated: 2026-10-17T11:14:05Z  
German version: https://hajto.de/zahnschema/zahn-27.md

- **FDI (ISO 3950):** 27
- **Universal (ADA):** #15
- **Palmer:** └7 (UL7)
- **Name:** Upper left second molar
- **Tooth type:** Second molar
- **Group:** Posterior tooth
- **Quadrant:** Quadrant 2: upper left (maxillary left)
- **Dentition:** Permanent dentition

## Neighbouring teeth

- [Tooth 26](https://hajto.de/en/tooth-chart/tooth-26.md): upper left first molar
- [Tooth 28](https://hajto.de/en/tooth-chart/tooth-28.md): upper left third molar (wisdom tooth)

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

- [Tooth 37](https://hajto.de/en/tooth-chart/tooth-37.md): lower left second molar

[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.