Tooth 25 (FDI): maxillary left second premolar
Quick answer
- Tooth 25 in FDI is Universal 13 and Palmer UL5: the maxillary left second premolar.
The three numbers
| System | Number |
|---|---|
| FDI | 25 |
| Universal | 13 |
| Palmer | UL5 |
Careful with plain numbers: Universal 25 is a different tooth, the mandibular right central incisor (FDI 41).
About this tooth
- Name
- Maxillary left second premolar
- Set
- Adult (permanent)
- Position
- Upper arch, patient left (upper left, quadrant 2)
- Erupts
- 10 to 12 years
- Roots
- 1
- Root canals
- 1 or 2
- Crown surfaces
- Mesial, distal, buccal, palatal (lingual) and occlusal.
- Also written
- #13 (Universal), 2.5 (FDI with a dot), upper left 5, second bicuspid
Read on 23 October 2026. Sources: American Dental Association, Tooth development charts (primary and permanent); Number of roots and canals, from Ingle's Endodontics; 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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