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Which baby tooth is letter E?

In the Universal Numbering System, primary tooth E is the primary upper right central incisor (primary maxillary right central incisor). Its FDI (ISO 3950) designation is 51 and its Palmer designation is A in the upper right quadrant. It is a incisor in the upper arch with typically 1 root.

Last verified
2026-07-08
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Query patterns

  • Which baby tooth is letter E?
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  • What is baby tooth E in FDI and Palmer notation?
  • Which tooth is FDI 51?
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  • ISO 3950 tooth 51
  • Which tooth is Palmer A Upper Right?
  • Palmer A Upper Right to Universal
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  • Primary Upper Right Central Incisor tooth number
  • Universal E FDI 51 Palmer A
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  • primary upper right central incisor
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Source citations

  • TOOTH-1 American Dental Association — Universal Numbering System (ada.org)
  • TOOTH-2 ISO 3950:2016 — Dentistry, designation system for teeth and areas of the oral cavity (FDI two-digit) (iso.org)
  • TOOTH-3 FDI World Dental Federation — two-digit notation (fdiworlddental.org)

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