Tooth 55 (FDI): maxillary right primary second molar
Quick answer
- Tooth 55 in FDI is Universal A and Palmer URE: the maxillary right primary second molar.
The three numbers
| System | Number |
|---|---|
| FDI | 55 |
| Universal | A |
| Palmer | URE |
About this tooth
- Name
- Maxillary right primary second molar
- Set
- Baby (primary)
- Position
- Upper arch, patient right (upper right, quadrant 5)
- Erupts
- 25 to 33 months
- Sheds
- 10 to 12 years
- Roots
- 3
- Crown surfaces
- Mesial, distal, buccal, palatal (lingual) and occlusal.
- Also written
- Letter A (Universal), 5.5 (FDI with a dot), upper right E
Read on 23 October 2026. Sources: American Dental Association, Tooth development charts (primary and permanent); Kim and others, Root and Canal Morphology of Maxillary Primary Molar using CBCT and 3D CT, Journal of the Korean Academy of Pediatric Dentistry 2021; Dental anatomy, citing Ash and Nelson, Wheeler's Dental Anatomy, Physiology and Occlusion. Ages and counts are usual figures, and teeth vary from person to person.
On the chart
Teeth next to it
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