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The Index of Orthodontic Treatment Need was developed and tested in 1989 by Brook and Shaw in England following a government initiative. [31] The aim of the IOTN is to assess the probable impact a malocclusion may have on an individual's dental health and psychosocial wellbeing. [32]
This index is based on in-field clinical examination of individuals by using a probe, mirror and cotton rolls, and simply counts the number of decayed, missing (due to caries only) and restored teeth. Another version proposed in 1931 [1] counts each affected surface, yielding a decayed, missing, and filled surfaces (DMFS) index. Statistics are ...
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]
Dentition analyses are systems of tooth and jaw measurement used in orthodontics to understand arch space and predict any malocclusion (mal-alignment of the teeth and the bite). [1] Example systems of dentition analysis are listed below.
Tooth condition indicates a person's general health. [2] Teeth should be clean with no decay, white with shiny enamel and smooth surfaces and edges. Adults should have a total of 32 teeth (16 teeth in each arch). By the age of 2 + 1 ⁄ 2, children have a total of 20 deciduous teeth (10 in each arch). Abnormal findings are missing, loose ...
Despite the adoption of the FDI World Dental Federation notation (ISO 3950) in most of the world and by the World Health Organization, the Palmer notation continued to be the overwhelmingly preferred method used by orthodontists, dental students and practitioners in the United Kingdom as of 1998.
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A contact point is created by touching of edges of two different teeth. During mandibular crowding, teeth are often rotated, displaced either palatally or buccally. The Little's irregularity index measures the horizontal linear displacement of anatomic contact points of each mandibular incisor from the adjacent anatomic point and sums the five ...
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