论文部分内容阅读
目的研究上颌前方牵引联合快速扩缩弓治疗恒牙早期安氏Ⅲ类错的骨性及牙性疗效。方法选取10例恒牙早期安氏Ⅲ类错患者,观察6个月作为观察对照期,随后应用前方牵引联合快速扩缩弓矫治6个月为治疗期,应用Pitchfork分析法比较对照期和治疗期在平均功能性平面上骨骼及牙齿的位置变化。结果磨牙关系改变了7.2 mm(t=6.85,P<0.05),包括骨性改变4.4 mm、牙性改变2.8 mm;骨性改变中上下颌骨贡献率约为1∶3,牙性改变中上下磨牙贡献率约为2∶3。结论前方牵引联合快速扩缩弓可有效治疗恒牙早期安氏Ⅲ类错,可取得较大的牙关系改善。
Objective To study the effect of maxillary anterior traction combined with rapid trabeculectomy on the treatment of early stage Angle Class Ⅲ malocclusion. Methods Ten cases of permanent early Angle malocclusion and type Ⅲ malocclusion were selected and observed for 6 months as the control period. The anterior traction combined with rapid trabeculectomy was used to treat 6 months. The Pitchfork analysis was used to compare the control period and the treatment period Changes in the position of bones and teeth on the average functional plane. Results The molar relationship was changed by 7.2 mm (t = 6.85, P <0.05), including a 4.4 mm change in bone and a 2.8 mm change in dentity. The contribution rate of maxillary and mandibular changes was about 1: 3 in skeletal changes, Molar contribution rate of about 2: 3. Conclusion Anterior traction combined with rapid expansion and contraction of the arch can effectively treat early Class Ⅰ malocclusion of Class Ⅲ malocclusion and achieve a greater improvement of the dental relationship.