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目的分析镍钛摇椅弓配合Ⅱ类牵引矫治成人安氏Ⅱ类1分类错的临床疗效。方法采用镍钛摇椅弓配合Ⅱ类牵引对14例成人安氏Ⅱ类1分类患者进行矫治,并对矫治前后的头影测量结果进行统计学分析。结果 14例患者治疗后双侧磨牙呈中性关系,尖窝锁结关系良好,覆牙合、覆盖正常,软组织侧貌改善。X线头影测量显示,治疗后U1-SN角减小13.66°,UI-NA和L1-NB距离分别减小5.51 mm和2.16 mm,前牙覆、覆盖分别减小1.69 mm和4.20 mm,除下颌中切牙明显压低外(t=-6.04,P<0.001),下颌磨牙还出现了一定量的伸长(t=10.26,P<0.001),但面高增加无统计学意义(t=1.44,P=0.18)。结论镍钛摇椅弓配合Ⅱ类牵引是矫治成人安氏Ⅱ类1分类错的有效方法,对其可能产生的副作用加以控制,可获得满意的治疗效果。
Objective To analyze the curative effect of Ni-Ti rocking-chair combined with type Ⅱ traction on treating Class Ⅱ division 1 malocclusion. Methods A total of 14 adults with Class Ⅱ division 1 malocclusion were treated by nickel-titanium rocking-chair combined with type Ⅱ traction. The results of cephalometric measurements before and after treatment were statistically analyzed. Results After treatment, the bilateral molars showed a neutral relationship. The relationship between the vertebral fossa and the socket was good, the occlusion was covered, the coverage was normal, and the soft tissue appearance was improved. X-ray cephalometry showed that the angle of U1-SN decreased by 13.66 ° and the distance between UI-NA and L1-NB decreased by 5.51 mm and 2.16 mm respectively. The thickness of the anterior lamina was 1.69 mm and 4.20 mm, respectively. The mandibular central incisors were significantly lower (t = -6.04, P <0.001), and mandibular molars also showed a certain amount of elongation (t = 10.26, P <0.001) , P = 0.18). Conclusion Ni-Ti rocking chair combined with type Ⅱ traction is an effective method to correct Class Ⅱ division 1 malocclusion in adults, and its possible side effects can be controlled to obtain satisfactory therapeutic effect.