The Universal Numbering System , sometimes called the "American System", is a dental notation system commonly used in the United States.
6-616: 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. However, dentists in the United Kingdom commonly still use the older Palmer notation despite the difficulty in representing its graphical components in computerized (non-handwritten) records. Dental charts are normally arranged from
12-638: Is designated by the International Organization for Standardization as standard ISO 3950 "Dentistry — Designation system for teeth and areas of the oral cavity". The system is developed by the FDI World Dental Federation . It is also used by the World Health Organization , and is used in most countries of the world except the United States (which uses the UNS ). Orientation of the chart
18-473: Is only used in the United States. 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 maxillary right third molar (" wisdom tooth ") and the count continues along the upper teeth to the left side. Then the count begins at the mandibular left third molar, designated number 17, and continues along the bottom teeth to
24-474: Is traditionally "dentist's view", i.e. patient's right corresponds to notation chart left. The designations "left" and "right" on the chart below correspond to the patient's left and right. Codes, names, and usual number of roots: (see chart of teeth at Universal Numbering System ) Syntax: <quadrant code><tooth code> Sometimes a dot is inserted between quadrant code and tooth code in order to avoid ambiguity with other numbering systems, especially
30-449: The right side. Each tooth has a unique number or letter , allowing for easier use on keyboards. Permanent teeth and their assigned numbers (Universal Tooth Numbering System) Upper right Upper left Lower left Lower right FDI World Dental Federation notation FDI World Dental Federation notation (also "FDI notation" or "ISO 3950 notation") is the world's most commonly used dental notation (tooth numbering system). It
36-414: The viewpoint of a dental practitioner facing a patient. The patient's right side appears on the left side of the chart, and the patient's left side appears on the right side of the chart. The labels "right" and "left" on the charts in this article correspond to the patient's right and left, respectively. Although it is named the "universal numbering system", it is also called the "American system" as it
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