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Universal 21FDI 34Palmer LL4

Lower left first premolar

The lower left first premolar sits in the lower left (q3), in the mandibular (lower) arch. It is Universal number 21, FDI/ISO 34, and LL4 in Palmer notation.

Where it sits

1
2
3
4
5
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7
8
9
10
11
12
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14
15
16
32
31
30
29
28
27
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25
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23
22
21
20
19
18
17

At a glance

Universal number
21
FDI / ISO number
34
Palmer notation
LL4
Quadrant
Lower left (Q3)
Arch
Mandibular (lower)
Side
Left
Tooth type
Premolar
Typical roots
1
Typical canals
Single

Also known as

  • Mandibular left first premolar
  • Lower left first bicuspid

Surfaces

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

Common procedures

  • ✓Composite filling
  • ✓Crown
  • ✓Root canal treatment
  • ✓Extraction

Adjacent teeth

Previous · Universal 20 · FDI 35Lower left second premolarNext · Universal 22 · FDI 33Lower left canine

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