空气喷砂技术对牙本质表面处理后与树脂粘结效果的影响

The effect of air abrasion on dentin-resin adhesive system

目的 :观察空气喷砂技术对牙本质表面处理后与复合树脂粘结的效果。方法 :用 2种树脂分别与牙本质进行粘结 ,按要求制成标本 ,随机分为 4组 ,采用微拉伸技术 ,测试标本断裂时的最大应力 ,并用扫描电镜观察各组树脂突的变化。结果 :牙本质表面经空气喷砂技术处理后与SEBOND树脂粘结微拉伸强度高于Esthet.XTM树脂。结论 :牙本质表面经空气喷砂技术处理后与SEBOND树脂粘结效果好。

Objectives:To evaluate the adhesive effect of resin and dentin perpared by air abrasion. Methods:Dentin of 48 permanent molars was exposed and treated with ① air sand blasting+whole acid corrosion+Estet. X TM,② air sand blasting+SE BOND,③ air sand blasting+Esthet. X TM,④Turbine+whole acid corrosion+Esthet.X TM respectively with 12 samples in each group. Then resin adhesive was applied.Microtensile testing was used to examine the microtensile bond strength. SEM was used to observe the change of resin jags. Results:The microtensile bonding strength in group ①,②,③ and ④ was 27.96±1.42, 29.84±2.56,14.48±2.45 and 27.73±1.48 respectively (① vs ③,② vs ③ and ③ vs ④ P<0.05). The length(μm) of resin jags in group ①,②,③ and ④ was 19～25,16～29,0 and 18～24 respectively. Conclusion:SE Bond adhensive system might be more suitable for clinical application when adhering to air abrasion prepared dentin.