Universal tooth 31
Tooth 31: Lower Right Second Molar
In the Universal Numbering System, tooth 31 is the lower right second molar (mandibular right second molar). Its FDI (ISO 3950) designation is 47 and its Palmer designation is 7 in the lower right quadrant. It is a molar in the lower arch with typically 2 roots.
- Universal
- 31
- FDI / ISO 3950
- 47
- Palmer
- 7
- Type
- Molar
- Arch & side
- lower, right
- Typical roots
- 2
Lower right · Permanent
Lower Right Second Molar
Mandibular Right Second Molar
- Universal
- 31
- FDI / ISO
- 47
- Palmer
- 7
- Type: Molar
- Arch & side: Lower (mandibular), right
- Typical roots: 2 (varies between individuals)
Full conversion table
Print / save as PDFUpper right
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 8 | 11 | 1 | |
| 7 | 12 | 2 | |
| 6 | 13 | 3 | |
| 5 | 14 | 4 | |
| 4 | 15 | 5 | |
| 3 | 16 | 6 | |
| 2 | 17 | 7 | |
| 1 | 18 | 8 |
Upper left
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 9 | 21 | 1 | |
| 10 | 22 | 2 | |
| 11 | 23 | 3 | |
| 12 | 24 | 4 | |
| 13 | 25 | 5 | |
| 14 | 26 | 6 | |
| 15 | 27 | 7 | |
| 16 | 28 | 8 |
Lower left
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 24 | 31 | 1 | |
| 23 | 32 | 2 | |
| 22 | 33 | 3 | |
| 21 | 34 | 4 | |
| 20 | 35 | 5 | |
| 19 | 36 | 6 | |
| 18 | 37 | 7 | |
| 17 | 38 | 8 |
Lower right
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 25 | 41 | 1 | |
| 26 | 42 | 2 | |
| 27 | 43 | 3 | |
| 28 | 44 | 4 | |
| 29 | 45 | 5 | |
| 30 | 46 | 6 | |
| 31 | 47 | 7 | |
| 32 | 48 | 8 |