Tooth 44 (FDI): mandibular right first premolar

The three numbers

About this tooth

Name

Mandibular right first premolar

Set

Adult (permanent)

Position

Lower arch, patient right (lower right, quadrant 4)

Erupts

10 to 12 years

Roots

1

Root canals

1

Crown surfaces

Mesial, distal, buccal, lingual and occlusal.

Also written

#28 (Universal), 4.4 (FDI with a dot), lower right 4, first bicuspid

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: 43 (mandibular right canine)
• Toward the back: 45 (mandibular right second premolar)
• Across the midline: 34 (mandibular left first premolar)
• In the other arch: 14 (maxillary right first premolar)

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