Universal tooth 17
Tooth 17: Lower Left Third Molar
In the Universal Numbering System, tooth 17 is the lower left third molar (mandibular left third molar). Its FDI (ISO 3950) designation is 38 and its Palmer designation is 8 in the lower left quadrant. It is a molar in the lower arch with typically 2 roots.
- Universal
- 17
- FDI / ISO 3950
- 38
- Palmer
- 8
- Type
- Molar
- Arch & side
- lower, left
- Typical roots
- 2
Commonly called the wisdom tooth.
Lower left · Permanent
Lower Left Third Molar
Mandibular Left Third Molar
- Universal
- 17
- FDI / ISO
- 38
- Palmer
- 8
- Type: Molar
- Arch & side: Lower (mandibular), left
- Typical roots: 2 (varies between individuals)
- Note: Commonly called the wisdom tooth.
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 |