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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.
The erupting premolars are smaller than the teeth they are replacing and this difference in space between the primary molars and their successors (1.5mm for maxillary, 2.5mm for mandibular [7]), termed Leeway Space. This allows the permanent molars to drift mesially into the spaces and develop a Class I occlusion.
Lack of health benefit as patient has minor occlusion irregularities DHC 3 and AC 1-5 Normally no NHS orthodontic treatment unless there are exceptional circumstances* Lack of health benefit even though there are greater irregularities. *patient with a Class II Division 2 malocclusion with traumatic over bite DHC 3 and AC 6-10, or DHC 4-5
In the Class II Division 2 incisal classification of malocclusion, the lower incisors occlude posterior to the cingulum plateau of the upper incisors and the upper central incisors are retroclined. The overjet is usually minimal but it may be increased.
Class III: The lower molar being mesial to its counterpart, again without a noted line of occlusion. [5] The Angle classification divides occlusion and malocclusion into four distinct classes: normal occlusion, Class I, II, and III. Although both normal occlusion and Class I have the same molar alignment relationship, there is a distinction in ...
The concept of ideal occlusion, as postulated by Angle and incorporated into a classification system, enabled a shift towards treating malocclusion, which is any deviation from normal occlusion. [8] Having a full set of teeth on both arches was highly sought after in orthodontic treatment due to the need for exact relationships between them.
Class 2 elastics are used from the lower first molar to the upper canine tooth. [1] They can be used for many different reasons, such as Class 2 malocclusions, to reinforce anchorage in a case where an extraction has been done, to allow the maxillary incisors to move backwards, and to correct midline deviation and allow buccal movement of ...
In addition, an adolescent or adult patient with retrognathic mandible, well aligned maxillary and mandibular dentition were also other indications of this appliance. Some of the malocclusions that can be treated with this appliance included Class II Division I, Class II Division II, Class III and Open Bites. [3]