# Tooth #24 (FDI 31): lower left central incisor

> FDI tooth 31 is the lower left central incisor (quadrant 3): Universal #24, Palmer LL1. With neighbouring teeth and the full chart.

Source: https://hajto.de/en/tooth-chart/tooth-31  
Last updated: 2026-10-17T11:14:48Z  
German version: https://hajto.de/zahnschema/zahn-31.md

- **FDI (ISO 3950):** 31
- **Universal (ADA):** #24
- **Palmer:** ┌1 (LL1)
- **Name:** Lower left central incisor
- **Tooth type:** Central incisor
- **Group:** Anterior tooth
- **Quadrant:** Quadrant 3: lower left (mandibular left)
- **Dentition:** Permanent dentition

## Neighbouring teeth

- [Tooth 41](https://hajto.de/en/tooth-chart/tooth-41.md): lower right central incisor
- [Tooth 32](https://hajto.de/en/tooth-chart/tooth-32.md): lower left lateral incisor

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

- [Tooth 21](https://hajto.de/en/tooth-chart/tooth-21.md): upper left central incisor

[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.