Permanent tooth reference
Tooth #17: Lower left third molar
In FDI notation, tooth #17 is 38. It is a third molar in the lower left part of the mouth.
Tooth #17 at a glance
- Location
- lower left
- Tooth type
- third molar
- FDI notation
- 38
- Adjacent teeth
- #18
- Opposing tooth
- #16
- Wisdom tooth
- Yes
What does tooth #17 identify?
Tooth #17 identifies the lower left third molar in the Universal numbering system used in the United States. It is a back tooth commonly called a wisdom tooth. Its matching FDI designation is 38.
A treatment plan or benefit statement may use the number alone. Confirm the number with the dental office if the document is unclear; a tooth number identifies location and does not explain a diagnosis or treatment by itself.