蚀刻方案及使用通用粘结剂的硅烷处理对二硅酸锂粘结强度的影响

Influence of Etching Protocol and Silane Treatment with a Universal Adhesive on Lithium Disilicate Bond Strength.

作者信息

Kalavacharla V K, Lawson N C, Ramp L C, Burgess J O

出版信息

Oper Dent. 2015 Jul-Aug;40(4):372-8. doi: 10.2341/14-116-L. Epub 2014 Dec 23.

DOI:10.2341/14-116-L

PMID:25535784

Abstract

OBJECTIVES

To measure the effects of hydrofluoric acid (HF) etching and silane prior to the application of a universal adhesive on the bond strength between lithium disilicate and a resin.

METHODS AND MATERIALS

Sixty blocks of lithium disilicate (e.max CAD, Ivoclar Vivadent) were sectioned into coupons and polished. Specimens were divided into six groups (n=10) based on surface pretreatments, as follows: 1) no treatment (control); 2) 5% HF etch for 20 seconds (5HF); 3) 9.5% HF etch for 60 seconds (9.5HF); 4) silane with no HF (S); 5) 5% HF for 20 seconds + silane (5HFS); and 6) 9.5% HF for 60 seconds + silane (9.5HFS). All etching was followed by rinsing, and all silane was applied in one coat for 20 seconds and then dried. The universal adhesive (Scotchbond Universal, 3M ESPE) was applied onto the pretreated ceramic surface, air thinned, and light cured for 10 seconds. A 1.5-mm-diameter plastic tube filled with Z100 composite (3M ESPE) was applied over the bonded ceramic surface and light cured for 20 seconds on all four sides. The specimens were thermocycled for 10,000 cycles (5°C-50°C/15 s dwell time). Specimens were loaded until failure using a universal testing machine at a crosshead speed of 1 mm/min. The peak failure load was used to calculate the shear bond strength. Scanning electron microscopy images were taken of representative e.max specimens from each group.

RESULTS

A two-way analysis of variance (ANOVA) determined that there were significant differences between HF etching, silane treatment, and the interaction between HF and silane treatment (p<0.01). Silane treatment provided higher shear bond strength regardless of the use or concentration of the HF etchant. Individual one-way ANOVA and Tukey post hoc analyses were performed for each silane group. Shear bond strength values for each etch time were significantly different (p<0.01) and could be divided into significantly different groups based on silane treatment: no silane treatment: 0 HF < 5% HF < 9.5% HF; and RelyX silane treatment: 0 HF < 5% HF and 9.5% HF.

CONCLUSIONS

Both HF and silane treatment significantly improved the bond strength between resin and lithium disilicate when used with a universal adhesive.

摘要

目的

测量在应用通用粘结剂之前，氢氟酸（HF）蚀刻和硅烷处理对二硅酸锂与树脂之间粘结强度的影响。

方法和材料

将60块二硅酸锂（e.max CAD，义获嘉伟瓦登特公司）切割成试样并进行抛光。根据表面预处理将试样分为六组（n = 10），如下：1）不处理（对照组）；2）5% HF蚀刻20秒（5HF）；3）9.5% HF蚀刻60秒（9.5HF）；4）不进行HF处理仅使用硅烷（S）；5）5% HF处理20秒+硅烷（5HFS）；6）9.5% HF处理60秒+硅烷（9.5HFS）。所有蚀刻后均进行冲洗，所有硅烷均涂覆一层20秒，然后干燥。将通用粘结剂（Scotchbond Universal，3M ESPE公司）涂覆在预处理后的陶瓷表面，空气稀释，光固化10秒。在粘结的陶瓷表面上方放置一根填充有Z100复合树脂（3M ESPE公司）的直径1.5毫米的塑料管，并在四周光固化20秒。对试样进行10000次热循环（5°C - 50°C/15秒保持时间）。使用万能试验机以1毫米/分钟的十字头速度加载试样直至破坏。使用峰值破坏载荷计算剪切粘结强度。对每组代表性的e.max试样拍摄扫描电子显微镜图像。

结果

双向方差分析（ANOVA）确定HF蚀刻、硅烷处理以及HF与硅烷处理之间的相互作用存在显著差异（p < 0.01）。无论是否使用HF蚀刻剂及其浓度如何，硅烷处理均能提供更高的剪切粘结强度。对每个硅烷组进行单独的单向ANOVA和Tukey事后分析。每个蚀刻时间的剪切粘结强度值均有显著差异（p < 0.01），并且根据硅烷处理可分为显著不同的组：不进行硅烷处理：0 HF < 5% HF < 9.5% HF；使用RelyX硅烷处理：0 HF < 5% HF且0 HF < 9.5% HF。