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The maxillary protraction means the traction effect on jaw, maxillary bone on the stimulus seam zone bone deposition, which produces orthopedic effect on the maxilla to correction of the bony jaw relations are not transferred due to malocclusion. Class III malocclusion malformation rates of up to 5% to 14%, which the maxillary hypoplasia factors occur in 42% to 63% of the skeletal class Ⅲ malocclusion patients. The growth and development of the protraction of the maxilla role has been widely recognized, but has passed on the growth and development of young adult patients, the op has not yet led to the treatment of the relevant reports. In this study, X cephalometric technology, activities and rational allocation of fixed appliance after correction of young adult bone to evaluate the efficacy of anti-merger, and analysis of young adults led correction mechanism: maxillary advancement? Mandible jaw under the rotation? teeth compensatory move?, or the proportion of each? evaluate the treatment effect, to provide a reference for clinical treatment. Objective: To study the protraction appliance young adult skeletal clinical efficacy of anti-together and hard and soft tissue changes, collectively, provide a theoretical basis for the clinical treatment of young adult bone anti and reference. Methods: Stomatological Hospital of the Fourth Military Medical University Orthodontics, nearly five years of young adult patients with skeletal class Ⅲ 15 cases, 7 males, 8 females, aged between 18-24 years old, with an average age of 19.2 years old, divided into groups, one led by appliance wear the maxillary activities before splint-jaw with fixed appliance; another set of the maxillary applications scaffolding rapid expansion led by appliance bow plus, the lower jaw with retractors Hop pad activities appliance evening maxillary protraction the the the United daytime Class Ⅲ Intermaxillary of traction for correction, formerly led by a course of about seven months, the total course of about 24 months. Each patient were taken before treatment and after treatment cephalometric positioning chip and full panoramic radiographs. Paired T test measurement data of the hard and soft tissue cephalometric film before and after treatment. Results: 15 patients after treatment, whether from the the shape cephalometric mouth occlusion are basically reached normal class III occlusal relationship changed class I occlusion. SNA, SNB, ANB, SND, FMA, IMPA by pre-treatment 79.4 ° ± 3.7 °, 83.5 ° ± 3.4 °, -4.1 ° ± 2.1 °, 81.4 ° ± 3.3 °, 21.5 ° ± 7.3 °, 84.7 ° ± 5.8 °, -1.5 ° ± 5.8 ° change of 81.1 ° ± 3.8 °, 82.6 ° ± 3.6 °, -1.5 ° ± 1.8 °, 80.6 ° ± 3.6 °, 23.3 ° ± 6.9 °, 81.2 ° ± 6.0 °, 3.6 ° ± 4.7 °, the changes are very significant statistical significance (P lt; 0.01). Conclusion: the rational allocation of the upper jaw and fixed appliance, both to eliminate occlusal interference but also continuous implementation of the maxillary orthopedic treatment is a clinically effective treatment in young adults with skeletal class Ⅲ anti together, the study results show that: young adults pull effective, the age limit may be appropriate to expand the clinical pull.
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