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The three most common systems are the FDI World Dental Federation notation (ISO 3950), the Universal Numbering System, and the Palmer notation. The FDI notation is used worldwide, and the Universal is used widely in the United States. The FDI notation can be easily adapted to computerized charting. Another system is used by paleoanthropologists.
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 is traditionally "dentist's view", i.e. patient's right corresponds to notation chart left.
With the move from written dental notes to electronic records, some difficulty in reproducing the symbols has been encountered. [4] On a standard keyboard 'slash' and 'backslash' may be used as a crude approximation to the symbols with numbers placed before or afterwards; hence 3/ is 3 ⏌ and /5 is ⎾ 5.
Universal numbering system. This is a dental practitioner view, so tooth number 1, the rear upper tooth on the patient's right, appears on the left of the chart. The Universal Numbering System, sometimes called the "American System", is a dental notation system commonly used in the United States. [1] [2]
A dental consonant is a consonant articulated with the tongue against the upper teeth, such as /θ/, /ð/. In some languages, dentals are distinguished from other groups, such as alveolar consonants , in which the tongue contacts the gum ridge.
Rather, the same symbol is used for all coronal places of articulation that are not palatalized like English palato-alveolar sh, or retroflex. To disambiguate, the bridge ([s̪, t̪, n̪, l̪], etc.) may be used for a dental consonant, or the under-bar ([s̠, t̠, n̠, l̠], etc.) may be used for the postalveolars.
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Th-stopping is the realization of the dental fricatives [θ, ð] as stops—either dental or alveolar—which occurs in several dialects of English. In some accents, such as of Indian English and middle- or upper-class Irish English, they are realized as the dental stops [t̪, d̪] and as such do not merge with the alveolar stops /t, d/; thus, for example, tin ([tʰɪn] in Ireland and [ʈɪn ...