Tooth 47 (FDI): mandibular right second molar
Quick answer
- Tooth 47 in FDI is Universal 31 and Palmer LR7: the mandibular right second molar.
The three numbers
| System | Number |
|---|---|
| FDI | 47 |
| Universal | 31 |
| Palmer | LR7 |
About this tooth
- Name
- Mandibular right second molar
- Set
- Adult (permanent)
- Position
- Lower arch, patient right (lower right, quadrant 4)
- Erupts
- 11 to 13 years
- Roots
- 2
- Root canals
- 3 or more
- Crown surfaces
- Mesial, distal, buccal, lingual and occlusal.
- Also written
- #31 (Universal), 4.7 (FDI with a dot), lower right 7
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
MolarPath is an independent study app. It is not affiliated with, endorsed by or sponsored by any exam regulator named here.