The effect on hard tissue of skeletal III classmalocclusion with malxillary protraction
Gao Guang-ming
Abstract
Gao Guang-ming
Abstract
objective To investigate the hard tissue changes of class Ⅲ patient trented withmaxillary protraction.Methods Sixteen skeletal class Ⅲ malocclusion cases with maxillary protraction .Cephalometrics before and after treatment were performed. The changes were compared. Results After the treatment,SNA increased 1.93,A-Ptm increased 2.78 mm.Mandible slightly backward,the difference weren't found statistically siginificant. Conclusion By maxillary protraction on class Ⅲ patients in the early permanent dention,anterior displacement and increase in post-anterior dimension of maxilla were found.
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objective To investigate the hard tissue changes of class Ⅲ patient trented withmaxillary protraction.Methods Sixteen skeletal class Ⅲ malocclusion cases with maxillary protraction .Cephalometrics before and after treatment were performed. The changes were compared. Results After the treatment,SNA increased 1.93,A-Ptm increased 2.78 mm.Mandible slightly backward,the difference weren't found statistically siginificant. Conclusion By maxillary protraction on class Ⅲ patients in the early permanent dention,anterior displacement and increase in post-anterior dimension of maxilla were found.
Key concepts: Medicine, Maxilla, Mandible (arthropod mouthpart), Malocclusion, Dentistry, Orthodontics, Hard tissue, Displacement (psychology)