Primary tooth O
Tooth O: Primary Lower Left Central Incisor
In the Universal Numbering System, primary tooth O is the primary lower left central incisor (primary mandibular left central incisor). Its FDI (ISO 3950) designation is 71 and its Palmer designation is A in the lower left quadrant. It is a incisor in the lower arch with typically 1 root.
- Universal
- O
- FDI / ISO 3950
- 71
- Palmer
- A
- Type
- Incisor
- Arch & side
- lower, left
- Typical roots
- 1
Lower left · Primary
Primary Lower Left Central Incisor
Primary Mandibular Left Central Incisor
- Universal
- O
- FDI / ISO
- 71
- Palmer
- A
- Type: Incisor
- Arch & side: Lower (mandibular), left
- Typical roots: 1 (varies between individuals)
Full conversion table
Print / save as PDFUpper right
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| E | 51 | A | |
| D | 52 | B | |
| C | 53 | C | |
| B | 54 | D | |
| A | 55 | E |
Upper left
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| F | 61 | A | |
| G | 62 | B | |
| H | 63 | C | |
| I | 64 | D | |
| J | 65 | E |
Lower left
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| O | 71 | A | |
| N | 72 | B | |
| M | 73 | C | |
| L | 74 | D | |
| K | 75 | E |
Lower right
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| P | 81 | A | |
| Q | 82 | B | |
| R | 83 | C | |
| S | 84 | D | |
| T | 85 | E |