Treatment of class III malocclusion

Treatment of class III malocclusion
..........The British Standards definition of Class III incisor relationship includes those malocclusions where the lower incisor edge occludes anterior to the cingulum plateau of the upper incisors (The overjet is reduced or reversed).
According to Angle classification, he stated that class III malocclusion is the advancement of the lower permanent 1st molar a half or complete cusp unit to the upper corresponding one. (the mesiobuccal cusp of the lower 1st molar occludes mesial to the Class I position).
Class III is the least common type of occlusal relationship in many communities as it affecting around 3-5 percent of population, therefore it is seen relatively less frequently in orthodontic practice.
? The main variants in class III malocclusion are:
1..The degree of class III sagittal relationship of the dental arches.
2..The degree of horizontal discrepancy in the upper and lower arch size.
3..The degree of crowding of teeth.
3..The dgree of incisal overbite or anterior openbite.
The source of these variations is found in the main etiological features:
((Skeletal factors; oral musculature; the size of the dentition)).
? Skeletal factors ; which have three important aspects:
? Antero-posterior skeletal relation: The skeletal relationship is the most important factor in the aetiology of most Class III malocclusions, and the majority of Class III incisor relationships are associated with an underlying Class III skeletal relationship which is also largely responsible for the reverse overjet and buccal crossbite in many cases.
? The relative width of the upper and lower jaws: Unilateral or bilateral crossbite may be caused by discrepancy in the width of the jaws, similarly since the buccal segments diverge backwards, discrepancy in the sagittal relation may produce ...... .