Tooth 22 (FDI): maxillary left lateral incisor

The three numbers

Careful with plain numbers: Universal 22 is a different tooth, the mandibular left canine (FDI 33).

About this tooth

Name

Maxillary left lateral incisor

Set

Adult (permanent)

Position

Upper arch, patient left (upper left, quadrant 2)

Erupts

8 to 9 years

Roots

1

Root canals

1

Crown surfaces

Mesial, distal, labial (facial), lingual and incisal.

Also written

#10 (Universal), 2.2 (FDI with a dot), upper left 2

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

• Toward the middle: 21 (maxillary left central incisor)
• Toward the back: 23 (maxillary left canine)
• Across the midline: 12 (maxillary right lateral incisor)
• In the other arch: 32 (mandibular left lateral incisor)

Convert any other tooth with the full chart.