T4K矫治器治疗替牙早期安氏Ⅱ类1分类错■的软、硬组织改变及稳定性

Study on soft and hard tissue changes and stability of early treatment of Class Ⅱ division 1 malocclusion with T4K appliances

目的 :探讨T4K矫治器治疗替牙早期安氏Ⅱ类1分类错[牙合]畸形后患者软、硬组织改变及稳定性。方法 :选择20例安氏Ⅱ类1分类错[牙合]畸形患者,男11例,女9例;年龄9~14岁,平均11.05岁。所有患者均行T4K矫治器治疗12个月。观察矫治前、矫治后12个月、36个月软、硬组织变化,评价T4K矫治器治疗安氏Ⅱ类1分类错[牙合]畸形的稳定性。采用SPSS 25.0软件包对数据进行统计学分析。结果:矫治后12个月,硬组织指标U1-NA、U1-NA、L1-NB、L1-NB显著减小(P<0.05),U1-L1显著增大(P<0.05);软组织指标UL-U1、LL-L1显著增大(P<0.05),覆盖、覆[牙合]、上唇突点至E线的垂直距离、下唇突点至E线的垂直距离显著减小(P<0.05),鼻唇角、颏沟倾角、颏软组织厚度显著增加(P<0.05)。矫治后36个月,上述指标与术后12个月相比无统计学差异(P>0.0.5)。结论 :T4K矫治器治疗替牙早期安氏Ⅱ类1分类错[牙合]畸形可纠正患者不良口腔习惯,改善口颌以及面部软、硬组织关系,远期效果好,疗效稳定。

PURPOSE: To investigate the effect of early treatment of Class Ⅱ division 1 malocclusion with T4K appliance on soft and hard tissue changes and prognosis of patients with mixed teeth. METHODS: Twenty patients with Class Ⅱ malocclusion, 11 males and 9 females, aged from 9 to 14 years, with an average age of 11.05 years, were selected. All patients were treated with T4K appliance for 12 months. The changes of soft and hard tissues before, 12 months after and36 months after orthodontic treatment were measured and compared, to explore the stability of T4K appliance in the treatment of Class Ⅱ division 1 malocclusion. The data were analyzed with SPSS 25.0 software package. RESULTS: The hard tissue indexes U1-NA, U1-NA, L1-NB, L1-NB were significantly decreased(P<0.05) and U1-L1 was significantly increased(P<0.05). Soft tissue index UL-U1, LL-L1 increased significantly(P<0.05);overjet, overbite, E-upper-lip, Elower-lip decreased significantly(P<0.05);nasolabial angle, sulcus dip, soft tissue thickness significantly increased(P<0.05). There was no significant difference between 12 months and 36 months after treatment( P>0.0.5). CONCLUSIONS:T4K appliance used for early treatment of Class Ⅱ malocclusion can correct patients’ poor oral habits, improve the relationship between oral and maxillofacial soft and hard tissues, with good long-term efficacy and stable curative effect.