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The Universal Numbering System, sometimes called the "American System", is a dental notation system commonly used in the United States. [1] [2] Most of the rest of the world uses the FDI World Dental Federation notation, accepted as an international standard by the International Standards Organization as ISO 3950. [3]
FDI World Dental Federation notation (also "FDI notation" or "ISO 3950 notation") is the world's most commonly used dental notation (tooth numbering system). [1] [2] It is designated by the International Organization for Standardization as standard ISO 3950 "Dentistry — Designation system for teeth and areas of the oral cavity". [3]
Dental professionals, in writing or speech, use several different dental notation systems for associating information with a specific tooth. The three most common systems are the FDI World Dental Federation notation (ISO 3950), the Universal Numbering System , and the Palmer notation .
The FDI World Dental Federation (French: Fédération dentaire internationale) is an international organization representing the dental profession to oral health by developing health policies, education programs, and advocating for dentistry internationally.
The notation was originally termed the Zsigmondy system after Hungarian dentist Adolf Zsigmondy, who developed the idea in 1861 using a Zsigmondy cross to record quadrants of tooth positions. [3] Adult teeth were numbered 1 to 8, and the child primary dentition (also called deciduous, milk or baby teeth) were depicted with a quadrant grid using ...
The universal numbering system uses a unique letter or number for each tooth. The uppercase letters A through T are used for primary teeth and the numbers 1 - 32 are used for permanent teeth. The tooth designated "1" is the right maxillary third molar and the count continues along the upper teeth to the left side.
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The Universal Numbering System for adult human teeth, used in the USA. The view is from a dental practitioner's perspective, meaning tooth 1 is the upper right rear (third) molar. Most countries use the FDI numbering system.
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