Tooth number 26 is the lower right lateral incisor, a permanent (adult) tooth. In the FDI (ISO 3950) system it is 42, and in Palmer notation it is 2┐.
Tooth #26 at a glance
| Universal (US) | 26 |
| FDI / ISO 3950 | 42 |
| Palmer | 2┐ |
| Name | Lower right lateral incisor |
| Type | Lateral incisor (adult tooth) |
| Jaw | Lower (mandible) |
| Side | Patient’s right |
| Comes in | 7-8 yrs |
| Roots | 1 |
| Root canals (usual) | 1, sometimes 2 |
| Chewing surface | An incisal edge |
Where it is and what it does
It sits in the lower jaw on the patient’s right side, second from the midline, beside the central incisor. Incisors are cutting teeth. Their thin, flat edges bite through food, and they matter a lot for speech and for how a smile looks.
Neighbouring and related teeth
- In front of it (toward the midline): Tooth number 25, the lower right central incisor
- Behind it: Tooth number 27, the lower right canine
- Same tooth on the other side: Tooth number 23
- The matching tooth in the upper jaw: Tooth number 7
- Replaces: Baby tooth Q, the baby lower right lateral incisor
Common dental work on this tooth
Front teeth are often chipped or knocked. Common treatments include bonding (tooth-coloured filling material), veneers, crowns and, after an injury that reaches the nerve, a root canal.
Questions
What tooth is number 26?
Tooth number 26 is the lower right lateral incisor. Numbers 1 to 32 are used for adult teeth in the Universal system used in the United States, starting with the upper right wisdom tooth.
What is tooth number 26 in the FDI and Palmer systems?
In FDI it is 42, said digit by digit (“four-two”). The first digit is the quadrant and the second is the position from the midline. In Palmer notation it is 2┐.
When does tooth 26 come in?
Usually at about 7-8 yrs. Timing varies from person to person.
For education only. This is not dental advice; your dentist can tell you what is right for your own teeth.