Universal tooth 20
Tooth 20: Lower Left Second Premolar
In the Universal Numbering System, tooth 20 is the lower left second premolar (mandibular left second premolar). Its FDI (ISO 3950) designation is 35 and its Palmer designation is 5 in the lower left quadrant. It is a premolar in the lower arch with typically 1 root.
- Universal
- 20
- FDI / ISO 3950
- 35
- Palmer
- 5
- Type
- Premolar
- Arch & side
- lower, left
- Typical roots
- 1
Lower left · Permanent
Lower Left Second Premolar
Mandibular Left Second Premolar
- Universal
- 20
- FDI / ISO
- 35
- Palmer
- 5
- Type: Premolar
- Arch & side: Lower (mandibular), left
- Typical roots: 1 (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 |