Tooth #2 – Upper right second molar
7th tooth back from the middle, upper right.
- International
- 17
- Palmer
- 7
- Type
- Molar
- Roots
- 3
- Canals
- usually 3
- Comes in
- 12–13 years
The big back tooth between the first molar and the wisdom tooth on the upper right.
- In front: #3 upper right first molar
- Behind: #1 upper right wisdom tooth
- Same tooth on the other side: #15 upper left second molar
- Bites against: #31 lower right second molar
None. Adult molars come in behind the baby teeth instead of replacing one.
Usually three roots (1–4) and usually three canals (1–4).
Upper second molars: roots, canals and the studies behind the counts →
This tooth is #2 in the US and 17 in the international (FDI) system, where the 1 means the upper right quarter and the 7 is its place counting from the front.
There's no international tooth 2, because those numbers always have two digits.
And in the US, #17 is the lower left wisdom tooth.
American Dental Association 2024; Harris 2005; American Dental Association 2012. Full titles are on the About page.