Tooth 51 (FDI): maxillary right primary central incisor

The three numbers

About this tooth

Name

Maxillary right primary central incisor

Set

Baby (primary)

Position

Upper arch, patient right (upper right, quadrant 5)

Erupts

8 to 12 months

Sheds

6 to 7 years

Roots

1

Root canals

1

Crown surfaces

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

Also written

Letter E (Universal), 5.1 (FDI with a dot), upper right A

Read on 23 October 2026. Sources: American Dental Association, Tooth development charts (primary and permanent); Salama and others, Anatomy of primary incisor and molar root canals, Pediatric Dentistry 1992; 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: 61 (maxillary left primary central incisor)
• Toward the back: 52 (maxillary right primary lateral incisor)
• Across the midline: 61 (maxillary left primary central incisor)
• In the other arch: 81 (mandibular right primary central incisor)

Convert any other tooth with the full chart.