3种自酸蚀粘结剂与3种树脂对V类洞的微渗漏影响

目的:比较3种自酸蚀粘结剂与3种树脂对牙齿V类洞的微渗漏的影响。方法:在45颗新鲜拔除的第三磨牙的颊舌侧颈部制备箱状(3 mm×2 mm×2 mm)V类洞。按随机数字法分为9组,每组有5颗牙齿,10个洞。有如下组合:A+D组(Easy one+Z350)、A+E组(Easy one+AP-X)、A+F组(Easy one+TPH)、B+D组(S3+Z350)、B+E组(S3+AP-X)、B+F组(S3+TPH)、C+D组(XV+Z350)、C+E组(XV+AP-X)、C+F组(XV+TPH)。按各粘结剂与复合树脂说明书方法,对每组洞进行相应的粘结剂和树脂充填。将牙放在37 ℃恒温水浴箱24 h后,室温下浸泡于1%的亚甲基蓝24 h,然后用金刚砂片将牙齿颊舌向切开为两半,在体式显微镜下观察微漏程度。结果:粘结剂S3 bond与不同树脂配伍使用时,其微渗漏存在显著性差异(P<0.05);粘结剂Easy one、Xeno V与不同树脂配伍使用时,其微渗漏不存在显著性差异;树脂Z350、可乐丽菲露AP-X与不同粘结剂配伍使用时,其结果存在显著性差异(P<0.05);树脂TPH与不同粘结剂使用时,其结果不存在显著性差异。结论:微渗漏的发生是粘结剂与树脂共同作用的结果。在临床用粘结剂与复合树脂修复V类洞时,应考虑其配伍性。

Effects of Different Self Etching Adhesives and Resins on Microleakage of Class V Restorations.

Objective: To compare the effects of three kinds of self-etching adhesives and three kinds of resins on the microleakage of Class V restorations. Methods: Box-shaped class V cavities (3mm×2mm×2mm) were prepared at the neck of buccal and lingual surfaces of 45 freshly extracted third molars. The teeth were divided into 9 groups randomly. There were 5 teeth in each group with 10 cavities. The cavities in each group were restored by different combinations of adhesives and resins. After restored in the constant temperature water of 37℃ for 24 hours, the specimens were soaked in 1% methylene blue solution at room temperature for 24 hours. The specimens were cut buccolingually into two halves with carborundum disc, and the microleakage degree was observed under the stereomicroscope. Results: When matched with S3 bond adhesive, the microleakage of the specimens with different resins was significantly different (P<0.05). When matched with Easy one adhesive and Xeno V adhesive, there was no significant difference in the groups restored by different resins. When restored by Z350 resin and Clearfil AP-X Composite resins, the microleakage was significantly different with different adhesives (P<0.05). When TPH resin was matched with different adhesives, there was no significant difference. Conclusion: The occurrence of microleakage was the result of the interaction between the adhesive and the resin. When Class V cavities were restored clinically, the compatibility of the adhesives and composite resins should be taken into consideration.