不同粘接系统用于树脂陶瓷复合材料的体外实验研究

In vitro experimental study of different bonding systems for resin ceramic composites

目的:研究不同粘接系统及老化处理对树脂陶瓷复合材料与牙本质间粘接强度的影响。方法:本研究使用了一种新型树脂陶瓷修复材料(Lava^(TM)Ultimate,优韧瓷)。在实验的第一部分,将制备好的离体牙随机分为3组,按照两步法自酸蚀通用型粘接系统、全酸蚀粘接系统、一步法自酸蚀通用型粘接系统将优韧瓷块与离体牙的牙本质面粘接,使用微机控制电子万能实验机测试每组粘接试件的静态断裂强度,并观察其断口形貌。实验第二部分则将以上3组粘接系统的剪切样本浸泡在3种不同酸碱度的溶液(可乐、苏打水、人工唾液)中,30 d后比较各组剪切强度间差异。结果:对于树脂陶瓷复合材料优韧瓷,一步法及两步法自酸蚀通用型粘接系统组的剪切强度皆优于全酸蚀粘接系统组,而一步法自酸蚀通用型粘接系统组与两步法自酸蚀通用型粘接系统组的粘接性能差异无统计学意义。3种粘接系统在不同浸泡液中浸泡老化后剪切强度均下降,但差异无统计学意义,浸泡液种类对剪切强度的影响也无统计学差异。结论:3种粘接系统对优韧瓷与牙体间的剪切强度均达到临床要求,且酸碱老化处理不影响3种粘接系统的剪切强度。

Objective:To study the effects of different bonding systems and aging treatment on the bonding strength between resin ceramic composites and dentin.Methods:A new hybrid ceramic restorative material(Lava^(TM) Ultimate excellent toughness porcelain)was used in the current study.In the first part of the experiment,the prepared isolated teeth were randomly divided into three groups:a two⁃step self⁃etching universal adhesive system,a total acid etching adhesive system,and a one⁃step self⁃etching universal adhesive system.The excellent toughness ceramic block was bonded to the isolated dentin surface.The static fracture strength of each group was measured using a microcomputer controlled electronic universal experimental machine,and the fracture morphology was observed.In the second part of the experiment,the shear specimens of the above⁃mentioned three adhesive systems were immersed in three different solutions(cola,soda water and artificial saliva)for 30 days to compare the difference of shear strength among the groups.Results:The shear strength values of the one⁃step and the two⁃step self⁃etching universal adhesive systems were both significantly higher than that of the total acid etching adhesive system,while the difference in bonding performance between the one⁃step universal bonding system and the two⁃step self etching universal bonding system was not statistically significant.The shear strength of the three bonding systems decreased after acid and alkali immersion aging,but without significar differences.And there was no statistical difference in the influence of three different solutions on shear strength.Conclusion:The shear strength between LavaTM Ultimate and teeth of the three adhesive systems meets clinical requirements,and acid and alkali aging treatment may not affect the shear strength of the three bonding systems.