【摘要】 目的 :测定酸蚀前和酸蚀后用氟化物对托槽粘接抗张强度的影响。方法 :采用因固定正畸需要而拔除的双尖牙 4 5颗 ,随机分成对照组、酸蚀中用氟组和酸蚀后用氟组 ,每组牙经酸蚀和不同用氟方法处理后 ,粘接托槽 ,水浴2 4 h后测托槽的粘接抗张强度。结果 :3组托槽粘接抗张强度无显著性差异。结论 :提示临床可使用酸蚀中及酸蚀后用氟 ,以预防釉质粘接面早期龋。更多还原

【Abstract】 Objective: To evaluate the effect of using fluoride during and after etching on the bonding strength of brackets. Methods: 45 extracted human premolar were divided into three groups: Group 1, control, not applying fluoride. Group 2, applying fluoride during etching. Group 3, applying fluoride after etching. In each group, the teeth were treated with etching and fluoride respectively and stored in water for 24 hours. Then brackets bonding strength were measured. Results: The results showed that there was not significant difference among the three groups. Conclusion: Fluoride can be used to prevent enamel white spot.更多还原