氢氟酸质量分数对二硅酸锂玻璃陶瓷表面形貌及树脂粘接的影响

发布时间：2018-04-06 23:24

本文选题：玻璃陶瓷　切入点：氢氟酸　出处：《华西口腔医学杂志》2017年06期

【摘要】：目的探讨不同质量分数的氢氟酸对二硅酸锂玻璃陶瓷表面形貌及树脂粘接耐久性的影响。方法制备大小为11 mm×13 mm×2 mm的二硅酸锂玻璃陶瓷片试件72个,经烧结、研磨、清洗后,随机分为3组,每组24个,分别接受质量分数为32%的磷酸、4%的氢氟酸、9.5%的氢氟酸处理20 s,形成酸蚀后试件。每组随机选出4个陶瓷片,1个使用扫描电子显微镜观察陶瓷表面形态,另外3个用表面粗糙度仪测量陶瓷片表面粗糙度参数(Ra、Rz和Rmax)。陶瓷片表面接受硅烷偶联剂/树脂粘接剂/树脂水门汀处理,并与直径3 mm的复合树脂柱粘接形成粘接试件。将每组20个粘接试件分为两组,10个试件直接进行剪切实验,10个试件经20 000次冷热循环后进行剪切实验。结果氢氟酸处理组试件表面粗糙度参数值均显著高于磷酸处理组;9.5%氢氟酸组除Ra以外的参数值均高于4%氢氟酸组(P0.05)。冷热循环明显降低了所有实验组的粘接强度(P0.05)。冷热循环前后,氢氟酸处理组的粘接强度均高于磷酸处理组;尽管4%氢氟酸组的粘接强度高于9.5%氢氟酸组,但9.5%氢氟酸组在冷热循环过程中的粘接强度降低幅度要明显低于4%氢氟酸组(P0.05)。结论氢氟酸的质量分数对陶瓷表面形态及与树脂的粘接耐久性有明显影响,9.5%氢氟酸能更有效地保持二硅酸锂玻璃陶瓷的树脂粘接强度。
[Abstract]:Aim to investigate the effect of hydrofluoric acid with different mass fraction on the surface morphology and adhesive durability of lithium disilicate glass ceramics.Methods Sintering, grinding and cleaning of 72 lithium disilicate glass ceramic specimens of 11 mm 脳 13 mm 脳 2 mm were randomly divided into 3 groups, 24 in each group.The samples were treated with hydrofluoric acid of 9. 5% and 32%, respectively, for 20 s. The samples were formed after etching.Each group randomly selected 4 ceramic pieces, one used scanning electron microscope to observe the surface morphology of ceramic, the other three measured the surface roughness parameters of ceramic plate by surface roughness instrument, Raj Rz and Rmaxo.The ceramic surface was treated with silane coupling agent / resin adhesive / resin cement and bonded with the composite resin column with diameter of 3 mm to form the adhesive specimen.Each group of 20 bonded specimens was divided into two groups, 10 specimens were directly shearing experiments, 10 specimens were subjected to 20 000 hot and cold cycles for shear experiments.Results the surface roughness parameters of hydrofluoric acid group were significantly higher than those of phosphoric acid group (9.5% hydrofluoric acid group except Ra) and 4% hydrofluoric acid group (P 0.05).The adhesive strength of all the experimental groups was significantly decreased by cold and hot circulation (P 0.05).The adhesion strength of hydrofluoric acid group was higher than that of phosphoric acid group, although the adhesion strength of 4% hydrofluoric acid group was higher than that of 9.5% hydrofluoric acid group.However, the adhesive strength of 9.5% hydrofluoric acid group was significantly lower than that of 4% hydrofluoric acid group during the cold and hot cycle.Conclusion the mass fraction of hydrofluoric acid has a significant effect on the surface morphology and adhesion durability of the ceramics. The adhesive strength of the resin of lithium disilicate glass ceramics can be maintained more effectively by 9.5% hydrofluoric acid.
【作者单位】：南京大学医学院附属口腔医院·南京市口腔医院修复科;
【基金】：国家自然科学基金面上项目(81470781) 江苏省自然科学基金面上项目(BK20141082)~~
【分类号】：R783.1

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