Dentovio
Universal tooth 20

Tooth 20: Lower Left Second Premolar

In the Universal Numbering System, tooth 20 is the lower left second premolar (mandibular left second premolar). Its FDI (ISO 3950) designation is 35 and its Palmer designation is 5 in the lower left quadrant. It is a premolar in the lower arch with typically 1 root.

Universal
20
FDI / ISO 3950
35
Palmer
5
Type
Premolar
Arch & side
lower, left
Typical roots
1
MidlinePatient rightPatient left1234567891011121314151632313029282726252423222120191817

Lower left · Permanent

Lower Left Second Premolar

Mandibular Left Second Premolar

Universal
20
FDI / ISO
35
Palmer
5
  • Type: Premolar
  • Arch & side: Lower (mandibular), left
  • Typical roots: 1 (varies between individuals)

Full conversion table

Print / save as PDF

Upper right

ToothUniversalFDIPalmer
8111
7122
6133
5144
4155
3166
2177
1188

Upper left

ToothUniversalFDIPalmer
9211
10222
11233
12244
13255
14266
15277
16288

Lower left

ToothUniversalFDIPalmer
24311
23322
22333
21344
20355
19366
18377
17388

Lower right

ToothUniversalFDIPalmer
25411
26422
27433
28444
29455
30466
31477
32488