Tooth O – Lower left baby central incisor
1st baby tooth back from the middle, lower left.
- International
- 71
- Palmer
- A
- Type
- Baby incisor
- Roots
- 1
- Comes in
- 6–10 months
- Falls out
- 6–7 years
One of the two teeth in the very middle of the lower jaw, the one on the left.
- Next to it, across the middle: P lower right baby central incisor
- Behind: N lower left baby lateral incisor
- Bites against: F upper left baby central incisor
lower left central incisor (#24), which comes in after this tooth falls out at 6–7 years.
This tooth is O in the US and 71 internationally, where the 7 means the lower left quarter and the 1 is its place counting from the front.
In Palmer it's A, but in the US system A is the upper right baby second molar.
American Dental Association 2024; Harris 2005; American Dental Association 2012; Katge et al. 2022; Tafti et al. 2023. Full titles are on the About page.