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Each maloccluded tooth is given a value of 1 while tooth in perfect occlusion is given a score of 0. A score of 0 will indicate a perfect occlusion; score of more than 10 would be classified as sufficient severity that would require orthodontic treatment; score between 1 and 9 would be classified as normal occlusion in which no orthodontic ...
Little's Irregularity Index is an index used in the field of Orthodontics to measure the crowding of Mandibular anterior arch. The index was first proposed by Robert M. Little in 1975 in his paper The Irregularity Index: A quantitative score of mandibular anterior alignment.
In orthodontics, a malocclusion is a misalignment or incorrect relation between the teeth of the upper and lower dental arches when they approach each other as the jaws close. The English-language term dates from 1864; [1] Edward Angle (1855–1930), the "father of modern orthodontics", [2] [3] [need quotation to verify] popularised it.
It is estimated that nearly 30% of the general population present with malocclusions that are in great need of orthodontic treatment. [1] However, the term dentofacial deformity describes an array of dental and maxillo-mandibular abnormalities, often presenting with a malocclusion, which is not amenable to orthodontic treatment alone and definitive treatment needs surgical alignment of upper ...
In the UK, an overjet is generally described as increased if it is >3.5 mm (0.14 in). The Index of Orthodontic Treatment Need rates overjet highly on its weighting system, second behind missing teeth. It then grades severity of overjet as: [12] Grade 3, Borderline need for treatment = increased overjet 3.5 mm (0.14 in) < 6 mm (0.24 in)
Cephalometric analysis depends on cephalometric radiography to study relationships between bony and soft tissue landmarks and can be used to diagnose facial growth abnormalities prior to treatment, in the middle of treatment to evaluate progress, or at the conclusion of treatment to ascertain that the goals of treatment have been met. [5]
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Tanaka and Johnston analysis is a mixed dentition analysis which allows one to estimate the space available in an arch for the permanent teeth to erupt. This analysis was developed by Marvin M. Tanaka and Lysle E. Johnston in 1974 after they conducted a study on 506 orthodontic patients done in Cleveland at the Case Western Reserve University School of Dental Medicine.