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Overbite is the extent of vertical (superior-inferior) overlap of the maxillary central incisors over the mandibular central incisors, [1] measured relative to the incisal ridges. [2] The term overbite does not refer to a specific condition, nor is it a form of malocclusion. Rather an absent or excess overbite would be a malocclusion.
Class II: The lower incisor edges lie posterior to the cingulum plateau of the upper incisors Division 1 – the upper central incisors are proclined or of average inclination and there is an increase in overjet; Division 2 – The upper central incisors are retroclined. The overjet is usually minimal or may be increased. Class III: The lower ...
If the lower incisor is anterior to the upper incisors, the overjet is given a negative value. [11] 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]
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Cephalometric analysis is the clinical application of cephalometry.It is analysis of the dental and skeletal relationships of a human skull. [1] It is frequently used by dentists, orthodontists, and oral and maxillofacial surgeons as a treatment planning tool. [2]
Occlusion, in a dental context, means simply the contact between teeth.More technically, it is the relationship between the maxillary (upper) and mandibular (lower) teeth when they approach each other, as occurs during chewing or at rest.
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Extraction as an orthodontic procedure was heavily opposed by Angle and those who followed him. As occlusion became the key priority, facial proportions and aesthetics were neglected. To achieve ideal occlusals without using external forces, Angle postulated that having perfect occlusion was the best way to gain optimum facial aesthetics.