镍钛丝拉簧加舌侧弹性牵引关闭拔牙间隙的临床研究

Clinical study of the nickel-titanium(NiTi) coil springs plus lingua draught with appliance in closing extraction spaces

目的研究镍钛丝拉簧加舌侧弹性牵引关闭拔牙间隙的临床效果。方法选择安氏Ⅰ类双颌前突22例共88象限区,采用镍钛拉簧加舌侧弹性牵引关闭间隙。结果经过治疗最后纳入统计的80个区,关闭间隙速度平均0.99 mm/月,治疗前后尖牙牙根及牙槽骨高度吸收轻微。结论镍钛丝拉簧加舌侧弹性牵引关闭拔牙间隙速度快且是安全的。

Objective To investigate the clinical effects of the nickel-titanium （NiTi） coil springs plus lingua draught with appliance to close the extraclion spaces. Methods Twenty-two cases （total 88 quadrants） of Angle Class I malocclusion and dental alveolar bimaxillary protrusion were selected. All of 88 quadrants were used the nickel-titanium （NiTi） coil springs plus lingua draught to close the extraction spaces. Results Eighty quadrants were counted after treatment, space closing speed was 0.99 mm/month. Length of canine root and height of alveolar bone were minor absorbed, there were no significant differences. Conclusion The nickel-titanium （NiTi） coil springs plus lingua draught with appliance to close the extraction spaces has the advantages of fast speed and satisfactory clinical effect.