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Universal 31FDI 47Palmer LR7

Lower right second molar

The lower right second molar sits in the lower right (q4), in the mandibular (lower) arch. It is Universal number 31, FDI/ISO 47, and LR7 in Palmer notation.

Where it sits

1
2
3
4
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7
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9
10
11
12
13
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16
32
31
30
29
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27
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21
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17

At a glance

Universal number
31
FDI / ISO number
47
Palmer notation
LR7
Quadrant
Lower right (Q4)
Arch
Mandibular (lower)
Side
Right
Tooth type
Molar
Typical roots
2
Typical canals
MB, ML, D

Also known as

  • Mandibular right second molar
  • Twelve-year molar

Surfaces

  • Mesial
  • Distal
  • Buccal (facial)
  • Lingual
  • Occlusal

Common procedures

  • ✓Composite or amalgam filling
  • ✓Crown
  • ✓Root canal (endodontic) treatment
  • ✓Onlay
  • ✓Extraction

Adjacent teeth

Previous · Universal 30 · FDI 46Lower right first molarNext · Universal 32 · FDI 48Lower right third molar

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