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目的:探讨拔除下颌切牙进行矫治,通过改变Bolton指数来进行代偿治疗中的作用。方法:采用回顾性研究的方法,对9例由于各种原因需拔除单个下颌切牙或配合拔除其它牙齿进行矫治的病例进行分析比较。结果:9个病例矫治时间为19～23个月,均采用直丝弓矫治技术。治疗结束后拔牙间隙均全部关闭,前牙覆牙合覆盖关系基本正常,后牙咬牙合关系较好。结论:部分上颌需要减数的成人骨性Ⅱ类病例,下颌可以考虑拔除一个下切牙矫治;某些轻、中度的成人骨性Ⅲ类患者也可拔除一个下切牙结合上颌邻面去釉进行矫治。拔除下颌切牙矫治在诊断设计时应权衡利弊,严格控制适应症,以获得良好、稳定的矫治效果。
OBJECTIVE: To investigate the effect of mandibular incisor extraction and compensatory treatment by changing Bolton index. Methods: A retrospective study of 9 cases due to various reasons need to remove a single mandibular incisor or remove the other teeth for correction of the cases were analyzed and compared. Results: Nine cases of treatment time was 19 to 23 months, all using straight wire arch correction techniques. Tooth extraction after the end of the gap were all closed, anterior crossbite coverage of the basic normal occlusion, posterior teeth bite occlusion is better. CONCLUSIONS: Some cases of adult skeletal Class II cases requiring some reduction in the maxilla may be treated by the removal of a mandibular incisor in the lower jaw. Some mild to moderate adult skeletal Class III patients may also be implanted with a lower incisor in combination with the maxillary adjacent face enamel Correction. Removal of mandibular incisors in the diagnosis of the design should weigh the pros and cons, strict control of indications, in order to obtain good and stable correction effect.