Tooth #30 – Lower right first molar
6th tooth back from the middle, lower right.
- International
- 46
- Palmer
- 6
- Type
- Molar
- Roots
- 2
- Canals
- usually 3
- Comes in
- 6–7 years
The first big back tooth on the lower right, right behind the premolars.
- In front: #29 lower right second premolar
- Behind: #31 lower right second molar
- Same tooth on the other side: #19 lower left first molar
- Bites against: #3 upper right first molar
None. Adult molars come in behind the baby teeth instead of replacing one.
Usually two roots (2–3) and usually three canals (2–4).
Lower first molars: roots, canals and the studies behind the counts →
This tooth is #30 in the US and 46 in the international (FDI) system, where the 4 means the lower right quarter and the 6 is its place counting from the front.
There's no international tooth 30, because those numbers always have two digits.
American Dental Association 2024; Harris 2005; American Dental Association 2012. Full titles are on the About page.