��̻�������֬���������в�ճ��ʵ���о�

目的探讨Esthet—X Flow光固化流体树脂粘接正畸托槽的效果。方法收集2012年1月至2012年2月在中国医科大学口腔医院颌面外科因正畸需要拔除的上颌第一前磨牙30颗，随机等分为3组：实验Ⅰ组应用Esthet—X Flow光固化流体树脂及Prime＆Bond NT粘接剂粘接托槽；实验Ⅱ组仅应用Esthet—X Flow光固化流体树脂粘接托槽；对照组应用京津釉质粘接剂粘接托槽。测试各组的抗剪切强度，并在光学显微镜下观察粘接剂残留情况。结果实验Ⅰ、Ⅱ组的抗剪切强度均明显低于对照组（P〈0．05），而实验Ⅰ、Ⅱ组间差异无统计学意义（P〉0．05），且抗剪切强度均大于9MPa，达到了临床应用标准。各组间粘接剂残留指数差异无统计学意义（P〉0．05）。结论单独应用Esthet—X Flow光固化流体树脂可满足临床粘接托槽的要求。

Study of bracket bonding with flowable composites

Objective To evaluate the adhesive effects of Esthet-X Flow flowable composite resin by analysing the shear bond strength （SBS） and adhesive remnant index （AIR）. Methods A total of 30 maxillary premolar teeth were randomly divided into three groups. All the teeth were prepared with 35% phosphoric acid for 30 seconds. In experimental group Ⅰ , the teeth were conditioned with prime ＆ bond NT primer, and the brackets were bonded with Esthet-X Flow flowable composite resin. In experimental group Ⅱ , the brackets were bonded with Esthet-X Flow flowable composite resin directly. In control group, the brackets were bonded with Jingjin enamel adhesive. All the specimens were stored in distilled water at 37℃ for 24 h. After storage, SBS was measured, and ARI was quantified by using an optical microscope. Results SBS of two experimental groups was lower than and had statistical difference with that of control group （P 〈 0.05）. There was no obvious difference between two experimental groups （P 〉0. 05）. ARI hade no obvious differences among the three groups （P 〉 0.05）. Conclusion Using prime ＆ bond NT primer or not has no effect on bond shear strength of Esthet-X Flow flowable composite resin. Esthet-X Flow flowable composite resin can satisfy the clinical need of bonding bracket.