10～15岁骨性Ⅲ类错双期矫治前后的软组织变化研究

Changes of soft tissue in 10～15 years old patients with skeletal class III malocclusion treated with two-phases correction

目的:探讨一种适合较大年龄骨性III类错的新型矫治方法并评价对软组织改变的效果及其机制。方法:选取30例10～15岁骨性III类错患者,将治疗分为两个阶段,第一阶段给予上颌前方牵引配合快速扩弓进行治疗,约半年后开始第二阶段多曲方丝弓技术直至咬合关系达到理想状态,给予保持。结果:所有患者经双期矫治后,上颌骨及上切牙前移,使面中部及上唇前移,下颌骨及下切牙后退,使颏部及下唇后移。从根本上改变了骨性III类错患者的凹陷型侧貌。结论:前方牵引可使骨改建,多曲方丝弓技术可产生充分牙性代偿,取二者之长将其相结合矫治骨性III类错,使其凹陷型侧貌由凹变直或变凸,显著改善了此类患者的容貌。是一种疗程短、效果佳、费用低的矫治方法,值得临床推广。

Objective To explore a novel and good remedy method for the patients between 10-15 years old with skeletal class Ⅲ malocclusion, and to evaluate its effects on soft tissues, Methods Thirty cases of patients aged from 10-15 years with skeletal class Ⅲ malocclusion were selected and their remedy process was divided into two treatment phases, at the first phase treated with a bonded maxillary expansion and protraction about half a year, followed by the second phase treated with MEAW technology. Results With the two-phase treatment, the maxillary was displaced anteriorly, and the maxillary incisors moved in anterior direction, and thereby the middle of the face and the upper lip moved forward too, whereas the mandible was rotated and the mandibular incisors moved posteriorly.Also the chin and the lower lip moved posteriorly, The concave profile of these patients were become balanced. Conclusion For the patients of 10-15 years old with skeletal class Ⅲ malocclusion, the treatment of maxilla protraction and MEAW technology can get an idea occlusal relationships with a balanced profile. It is a prompt but a good remedy method.