摘要
目的研究Damon Q自锁托槽和传统MBT托槽转矩控制上是否存在差异。方法收集使用Damon Q自锁托槽和传统MBT托槽矫治结束的拔牙病例,均使用两步法关闭拔牙间隙。在治疗前(T0)和拆除托槽前(T1)测量两组患者的头颅侧位X线片。采用SPSS23软件包比较两组患者的上前牙转矩的控制效果。结果两组患者上前牙明显内收、双唇突度显著减小,U1-SN、U1-NA、U1-NA角、ULP、LLP减小,有统计学意义(P<0.05)。两组变化量无显著差异(P>0.05)。上前牙转矩U1-SN、U1-NA、U1-NA°均在正常范围内。Damon Q自锁托槽组的疗程为(24.1±0.5)个月,传统MBT托槽组的疗程为(22.4±0.7)个月,Damon Q自锁托槽组较传统MBT托槽组疗程稍长,有统计学意义(P<0.05)。结论标准转矩Damon Q自锁托槽与传统MBT托槽在拔牙内收病例中都可有效的控制前牙转矩,但Damon自锁托槽组疗程稍长。
Objective To investigate whether the torque capacity of Damon Q self-ligating brackets and conventional MBT brackets have difference.Method A total of 44 patients followed up prospectively,were divided into two groups,one receiving Damon Q selfligating bracket and the other treated with a conventional MBT appliance,both groups using the two-step method to close extraction space.Computerized cephalometric analysis and statistics analysis （T-test） were carried out before treatment and after treatment.The control effect of the torque of upper anterior teeth between the two groups was compared using SPSS23 software.Results Both groups had a significant average reduction in incisor and lib protrusion without changes of occlusion plane.U1-SN,U1-NA,U1-NA°,ULP and LLP of both groups decreased significantly and there was significant difference （P〈 0.05）.Changes of two groups were similar in the skeletal,dental and soft tissue （P〉0.05）.The torques of upper anterior teeth,U1-SN,U1-NA,U1-NA°,were all within normal limits.The treatment duration of Damon Q self-ligating group was longer with （24.1 ± 0.5） months than that of conventional MBT bracket group with （22.4 ± 0.7） months,having statistically significance （P〈 0.05）.Conclusion For extraction treatment,using Damon Q self-ligating brackets can achieve similar results while with likely longer treatment durations compared to conventional MBT brackets.
作者
林爽
杜静
雷浪
李煌
LIN Shuang DU Jing LEI Lang LI Huang.(Department of Orthodontics, School of Stomatology,Medical School of Nanfing University, Nanjing 210008, China)
出处
《口腔医学》
CAS
2017年第9期810-814,共5页
Stomatology
基金
国家自然科学基金(81470712,81670960)
南京市医学科技发展资金重点项目(2014)
