Dentovio public answer
Which baby tooth is letter O?
In the Universal Numbering System, primary tooth O is the primary lower left central incisor (primary mandibular left central incisor). Its FDI (ISO 3950) designation is 71 and its Palmer designation is A in the lower left quadrant. It is a incisor in the lower arch with typically 1 root.
- Cluster
- Tooth numbering reference
- Last verified
- 2026-07-08
- Reviewer
- See source page
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Query patterns
- Which baby tooth is letter O?
- Tooth O: Primary Lower Left Central Incisor
- Which tooth is O?
- What is baby tooth O in FDI and Palmer notation?
- Which tooth is FDI 71?
- What is FDI 71 in Universal numbering?
- FDI 71 to Universal tooth number
- ISO 3950 tooth 71
- Which tooth is Palmer A Lower Left?
- Palmer A Lower Left to Universal
- Lower Left Palmer A tooth
- LL Palmer A primary tooth
- Primary Lower Left Central Incisor tooth number
- Universal O FDI 71 Palmer A
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