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Which tooth is number 19?

In the Universal Numbering System, tooth 19 is the lower left first molar (mandibular left first molar). Its FDI (ISO 3950) designation is 36 and its Palmer designation is 6 in the lower left quadrant. It is a molar in the lower arch with typically 2 roots.

Last verified
2026-07-08
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Query patterns

  • Which tooth is number 19?
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  • Which tooth is FDI 36?
  • What is FDI 36 in Universal numbering?
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  • Which tooth is Palmer 6 Lower Left?
  • Palmer 6 Lower Left to Universal
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  • Lower Left First Molar tooth number
  • Universal 19 FDI 36 Palmer 6
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  • lower left first molar
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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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