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目的 :探讨安氏Ⅱ类错鸦合不拔牙矫治的适应证和禁忌证。方法 :5例以下颌后缩为主处于青春期的患者用肌激动器和固定矫治器双期治疗。 11例上颌轻中度拥挤 ,上颌第二磨牙未萌的安氏Ⅱ类错鸦合推磨牙向后矫治 ,4例侧貌直面型上下切牙角度较小 ,牙列轻中度拥挤用固定矫治器 ,唇倾前牙。结果 :5例双期治疗侧貌改善明显 ,Ⅱ类关系矫治为Ⅰ类关系。15例牙列轻中度拥挤矫治为Ⅰ类关系 ,侧貌基本保持不变。结论 :以下颌后缩为主、非高角的青春期病例及直面型、非高角、面下 1/ 3正常、上牙列轻中度拥挤、上颌第二磨牙未萌的病例为安氏Ⅱ类错鸦合 不拔牙矫治适应证。重度拥挤、高角、严重上颌发育过度则为禁忌。
Objective: To investigate the indications and contraindications of Class Ⅱ malocclusion without extraction. Methods: Five patients with mandibular retrusion were predominantly adolescent patients treated with muscle exciters and fixed appliances. 11 cases of maxillary mild to moderate crowding, the second maxillary second molars did not adorable Class Ⅱ misshapen Meridian orthodontic treatment, 4 cases of straight face up and down lower incisors, dentition light and moderate crowding with fixed correction Device, lips pour front teeth. Results: Five cases of double-phase treatment improved significantly, class Ⅱ relationship correction class Ⅰ relationship. 15 cases of dentition light moderate degree of crowding correction for the relationship of type Ⅰ, the basic appearance remains unchanged. CONCLUSIONS: In the cases of adolescent mandibular retrusion, non-high-angle adolescence with straight face type, non-high angle, 1/3 normal under the face, light maxillary crowding of the upper dentition, Case 2 Acupuncture not pull tooth correction indications. Severe congestion, high angle, severe over-development of maxillary taboo.