应用Quick自锁托槽系统矫治上颌牙列拥挤的牙弓测量分析

Study on dental arch width on correction of maxillary dental crowding with Quick self-ligating system

目的探讨Quick自锁托槽系统非拔牙矫治上颌牙列拥挤病例的牙弓变化特征。方法选取37例上颌牙列轻到中度拥挤的正畸患者,使用Quick自锁托槽系统进行非拔牙矫治。对治疗前和上颌牙列排齐整平时的研究模型进行多项指标测量。应用SPSS 12.0统计软件分析治疗前后上颌牙弓宽度、牙弓长度及周长的变化。结果上颌牙列排齐后与治疗前阶段相比,牙弓长度、周长、前磨牙间宽度和第一磨牙间宽度均显著增加,尖牙间宽度和第二磨牙间宽度无显著变化。结论对于上颌牙列轻到中度拥挤的患者,在应用Quick自锁托槽系统排齐和整平牙列的初期,就可使上颌牙弓宽度、牙弓长度及周长均显著增大,扩大临床不拔牙矫治的范围。

Objective To clarify changes in the dental arch on nonextraction correction of maxillary dental crowding with Quick self-ligating system.Methods The Quick self-ligating system was used in 37 patients with mild and moderate crowding in the maxillary arch.Models of the maxillary arch were taken before treatment and at the end of leveling and aligning phase.Width,depth and perimeter of the dental arch were measured on the pre-treatment and post-treatment models.All data were analyzed by SPSS12.0 software.Results Compared with pre-treatment,on the post-treatment statistically significant increases were recorded in depth,perimeter and premolar widths and the first molar widths.No significant changes were found in the cuspid width and the the second molar width.Conclusions During the initial phase of leveling and aligning,the Quick self-ligating system produces significant increases in the dental arch width and depth and perimeter of the maxillary arch.