Tooth 46 (FDI): mandibular right first molar
Quick answer
- Tooth 46 in FDI is Universal 30 and Palmer LR6: the mandibular right first molar.
The three numbers
| System | Number |
|---|---|
| FDI | 46 |
| Universal | 30 |
| Palmer | LR6 |
About this tooth
- Name
- Mandibular right first molar
- Set
- Adult (permanent)
- Position
- Lower arch, patient right (lower right, quadrant 4)
- Erupts
- 6 to 7 years
- Roots
- 2
- Root canals
- 3 or more
- Crown surfaces
- Mesial, distal, buccal, lingual and occlusal.
- Also written
- #30 (Universal), 4.6 (FDI with a dot), lower right 6
Read on 23 October 2026. Sources: American Dental Association, Tooth development charts (primary and permanent); Number of roots and canals, from Ingle's Endodontics; Dental anatomy, citing Ash and Nelson, Wheeler's Dental Anatomy, Physiology and Occlusion. Ages and counts are usual figures, and teeth vary from person to person.
On the chart
Teeth next to it
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