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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of fluoride application on tensile bond strength of self-etching adhesive systems to demineralized dentin.
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Effect of fluoride application on tensile bond strength of self-etching adhesive systems to demineralized dentin.

机译：氟化物的施加对自蚀刻胶粘剂系统对软化牙本质的拉伸粘合强度的影响。

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Statement of Problem. It has been reported that the bond strength of composite to demineralized dentin is lower than that to sound dentin. This can be a problem in the success of so-called sealed restorations. Purpose. The aim of this study was to evaluate the effect of fluoride application on the tensile bond strength of self-etching adhesive systems to demineralized dentin. Material and Methods. One hundred twenty extracted bovine incisors were ground flat with 600-grit silicone carbide paper. Ninety teeth were then immersed in acetate buffer (pH 4.0) to form demineralized dentin. These teeth were randomly divided into 3 groups of 30 each: surfaces treated with fluoride solution (Group NF), surfaces treated with fluoride solution followed by a water rinse (Group RF), and control surfaces with no pretreatment (Group C). The remaining 30 teeth comprised a group with normal dentin surfaces (Group S). Each group was further divided into 3 subgroups of 10 each to test the bond strength test of Clearfil SEBond, Unifil Bond, and Mac-Bond II. Tensile bond strengths (in MPa) were measured with a universal testing machine at a crosshead speed of 0.5 mm/min. Mean bond strengths were analyzed by 2-way analysis of variance and Fisher's PLSD (P =.05). SEM observations of the surfaces before and after priming and at resin-dentin interfaces in each group were performed. Elemental analysis of the dentin surfaces before priming was also carried out. Results. The bond strengths of the adhesives to demineralized dentin in Groups NF, RF, and C were significantly lower than that of the normal dentin in Group S (P <.05). The mean bond strengths of the 3 adhesives in Group NF were higher than those in Groups RF and C, but a significant difference was observed only when Clearfil SE Bond was used (P <.05). In SEM images the open dentinal tubules on the surface and the resin tag formation at the resin-dentin interface were apparent in Group NF but were not observed in Groups RF and C. On elemental analysis, considerable amounts offluoride and calcium were detected in the surfaces of Group NF. Conclusion. Within the limitations of this study, the surface treatment with fluoride solution supported the resin tag formation at the resin-dentin interface and slightly improved the bond strength of the self-etching adhesive systems tested to demineralized dentin. This result indicated that the fluoride treatment to demineralized dentin might contribute to the success of the sealed restoration.
机译：问题陈述。据报道，复合材料与脱矿牙本质的结合强度低于对健全牙本质的结合强度。在所谓的密封修复的成功中这可能是一个问题。目的。这项研究的目的是评估氟化物对自蚀刻胶粘剂对脱矿质牙本质的拉伸粘合强度的影响。材料与方法。用600粒度的碳化硅纸将120颗提取的牛门齿磨平。然后将九十颗牙齿浸入醋酸盐缓冲液（pH 4.0）中，以形成脱矿质的牙本质。这些牙齿被随机分为3组，每组30个：用氟化物溶液处理过的表面（NF组），用氟化物溶液处理后用水冲洗的表面（RF组）和未经预处理的对照表面（C组）。剩下的30颗牙齿包括一个具有正常牙本质表面的组（S组）。将每组进一步分为3个子组，每组10个组，以测试Clearfil SEBond，Unifil Bond和Mac-Bond II的粘合强度测试。用万能试验机以0.5mm / min的十字头速度测量拉伸粘合强度（以MPa计）。通过方差的2通分析和Fisher的PLSD分析平均粘结强度（P = .05）。在各组中进行底涂之前和之后以及在树脂-牙本质界面处的SEM观察。涂底漆之前还对牙本质表面进行了元素分析。结果。 NF，RF和C组中粘合剂与软化牙本质的粘合强度显着低于S组中正常牙本质的粘合强度（P <.05）。 NF组中3种胶粘剂的平均粘结强度高于RF组和C组，但只有使用Clearfil SE Bond时才观察到显着差异（P <.05）。在SEM图像中，NF组中表面上的开放性牙本质小管和树脂-牙质界面处的树脂标签形成明显，而RF和C组中则未观察到。在元素分析中，表面中检测到大量的氟化物和钙NF组。结论。在本研究的范围内，用氟化物溶液进行的表面处理支持了树脂-牙本质界面处的树脂标签形成，并略微提高了测试到的脱盐牙本质的自蚀刻粘合剂体系的粘结强度。该结果表明氟化物处理脱矿的牙本质可能有助于密封修复的成功。

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