不同材料修复楔状缺损后粘接力的对比研究

The shear bond strength of different materials filled in wedge-shaped defect examined in vitro

目的:研究不同充填材料修复楔状缺损后对粘接力的影响。方法:将70颗人离体前磨牙颊侧颈部制备统一标准的楔状缺损,随机分为7组(n=10):1组:单纯常规玻璃离子水门汀(GIC)充填(对照组);2组:GIC垫底+FiltekTMZ350纳米树脂充填;3组:Fuji II玻璃离子充填;4组:Fuji II LC Improved充填;5组:单纯流动复合树脂(Esthet-X Flow)充填;6组:单纯Z350纳米树脂充填;7组:Esthet-X Flow垫底+FiltekTMZ350纳米树脂充填。经冷热循环老化试验用剪切方法比较不同组的粘接力。结果:Kruskal-Wallis H检验显示,7组的剪切力值不完全相同(P<0.05)。Wilcoxon秩和检验显示:2、5、6组间无差别,均分别高于1、3、4组,均低于第7组(P<0.05)。结论:Esthet-X Flow垫底+FiltekTMZ350纳米树脂夹层组粘接力最高。

Objective： To study the shear bond strength of different materials filled in wedge-shaped defect. Methods： Standerd wedge- shaped defect was made on the baccol side of dental neck in 70 extracted human premolars, then the teeth were randomly divid- ed into 7 groups（ n = 10）. The specimens were filled with different materials as following： in group 1, traditional glass ionomer cement （GIC） （ control group） ; in group 2 ： sandwich technique of GIC ＋ FiltekTM Z350 Nano- resin ; in group 3, glass ionomer cement FujiⅡ （GIC Fuji Ⅱ ） ; in group 4, Light-cured, resin-reinforced glass ionomer cement （GIC FujiⅡLC Improved） ;in group 5, flowable com- posite（Esthst-X Flow） ; in group 6, FihekTM Z350 Nano-resin; in group 7, sandwich technique of Esthet-X Flow ＋ FiltekTM Z350 Nano-resin. After thermal cycling aging test, the shear bond strength in different groups were compared by cut method. Results： There were significantly difference in the bond strength among the 7 groups analyzed by Kruskal-Wallis H test （P 〈 0.05 ）. There were not difference in the shear bond strength among group 2, 5 and 6, but the shear bond strength in group 2,5 and 6 was higher than in group 1, 3 and 4. The shear bond strenth in group 7 was the highest （P 〈 0. 05 ）. Conclusion： Sandwich technique of Esthet-X Flow ＋ FiltekTM Z350 Nano-resin may produce high shear bond strengh in wedge-shaped tooth defect.