Tooth 17 (FDI): maxillary right second molar
Quick answer
- Tooth 17 in FDI is Universal 2 and Palmer UR7: the maxillary right second molar.
The three numbers
| System | Number |
|---|---|
| FDI | 17 |
| Universal | 2 |
| Palmer | UR7 |
Careful with plain numbers: Universal 17 is a different tooth, the mandibular left third molar (FDI 38).
About this tooth
- Name
- Maxillary right second molar
- Set
- Adult (permanent)
- Position
- Upper arch, patient right (upper right, quadrant 1)
- Erupts
- 12 to 13 years
- Roots
- 3
- Root canals
- 3 or more
- Crown surfaces
- Mesial, distal, buccal, palatal (lingual) and occlusal.
- Also written
- #2 (Universal), 1.7 (FDI with a dot), upper right 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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