<臨床>II級2類の2治験例

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Class II, Division 2 in Angle's classification of malocclusion has been previously defined as "bilaterally distal position of lower arch, with retruding upper incisors, normal breathers". It has a characteristic of deep bite in order to achieve upper central incisor retroclinate. Treatment planning for Class II, Division 2 malocclusion should be firstly carried out to correct anteroposterior relationship and deep overbite during mixed dentition and secondly to establish a functional occlusion in a permanent dentition. There are two possible ways to correct deep overbite in orthodontic treatment: one is a skeletal bite opening by elongation of the molars, which causes the mandible to rotate downward, and the other is the dental bite opening with intrusion of the incisors. Careful selection of these approaches is important to accomplish the correction of this problem. We presented two cases with Class II, Division 2 malocclusion treated by two different approaches. [case 1] This was a 12-year 1-month old girl that had Class II, Division 2 malocclusion with a flat mandibular plane angle. The patient was treated with a cervical pull headgear and a jumping plate. Thereafter she was subjected to the Begg light wire treatment without extraction and attained satisfactory interdigitation. [case 2] A boy, 9-years 9-months old, showed Class II, Division 2 malocclusion with a mean mandibular plane angle. We attempted to treat this case by opening the bite using high pull headgear and utility archwire in the maxilla. Thereafter he attained satisfactory interdigitation with non-extraction edgewise treatment.
北海道医療大学の論文
1988-06-30

<臨床>II級2類の2治験例

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