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KMID : 0361920000300040387
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Korean Journal of Orthodontics
2000 Volume.30 No. 4 p.387 ~ p.398
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Abstract
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This study was aimed to observe the effect of Anterior J hook headgear on the craniofacial structures in mixed dentition with Class II malocclusion.
The laterial c-phalograms of 20´ children treated by Anterior J hook headgear were traced, digitized and statistically analyzed.
The results were as follows
1. Forward growth of maxilla was inhibited.
2. Rotational effect of maxilla was not observed.
3. There was distal movement of maxillary dentition.
4. Maxillary_.dentoalveolar growth changes were more effective in anterior portion than posterior portion. &.Mandible maintained a normal growth and mandibular plane angle- was maintained during treatment period. 6. The ratio of anterior facial height to posterior facial height was almostly not changed.
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