Tooth 27 (FDI): maxillary left second molar
Quick answer
- Tooth 27 in FDI is Universal 15 and Palmer UL7: the maxillary left second molar.
The three numbers
| System | Number |
|---|---|
| FDI | 27 |
| Universal | 15 |
| Palmer | UL7 |
Careful with plain numbers: Universal 27 is a different tooth, the mandibular right canine (FDI 43).
About this tooth
- Name
- Maxillary left second molar
- Set
- Adult (permanent)
- Position
- Upper arch, patient left (upper left, quadrant 2)
- Erupts
- 12 to 13 years
- Roots
- 3
- Root canals
- 3 or more
- Crown surfaces
- Mesial, distal, buccal, palatal (lingual) and occlusal.
- Also written
- #15 (Universal), 2.7 (FDI with a dot), upper left 7
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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