Effect of calcium hydroxide intracanal dressing on the bond strength of a resin-based endodontic sealer
Effect of calcium hydroxide intracanal dressing on the bond strength of a resin-based endodontic sealer
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DOI：
10.1590/s0103-64402008000300009
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发表时间：
2008-01-01
影响因子：
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通讯作者：
Teixeira, Fabrício B.
中科院分区：
文献类型：
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作者：
Barbizam, João Vicente Baroni;Trope, Martin;Teixeira, Fabrício B.
这项体外研究的目的是评估放置氢氧化钙 [Ca(OH)2] 敷料后基于 Epiphany 树脂的封闭剂与牙本质壁的粘合强度。使用 2.5% NaOCl + EDTA 作为冲洗剂对 15 颗拔出的单根人类牙齿进行仪器处理。根据根管内敷料情况，将牙齿随机分为3组（n=5）：G1=Ca(OH)2+生理盐水； G2= Ca(OH)2 + 2% 葡萄糖酸氯己定 (CHX) 凝胶； G3=盐水（对照）。在 37 摄氏度、100% 湿度下储存 10 天后，除去敷料，并用 Epiphany 封闭剂填充根管。再储存 48 小时后，将样本横向切成 2 毫米厚的圆盘。进行推出测试（1 毫米/分钟，Instron 4411）并记录失效时的最大负载（以 MPa 为单位）。单向方差分析和 Newman-Keuls 测试显示，与对照组 (13.82 +/- 3.9) 相比，在 Epiphany 根管充填之前使用 Ca(OH)2 敷料时，粘合强度显着下降 (G1= 10.18 +/- 1.99 和 G2= 9.98 +/- 2.97) (p< 0.05)。可以得出结论，使用 Ca(OH)2 作为根管内敷料材料会影响 Epiphany 对根管壁的粘附力，但即使该值在文献中发现的可接受范围内。
The aim of this in vitro study was to evaluate the bond strength of Epiphany resin-based sealer to dentin walls after placement of calcium hydroxide [Ca(OH)2] dressings. Fifteen extracted single-rooted human teeth were instrumented using 2.5% NaOCl + EDTA as irrigants. The teeth were randomly assigned to 3 groups (n=5), according to the intracanal dressing: G1= Ca(OH)2 + saline; G2= Ca(OH)2 + 2% chlorhexidine gluconate (CHX) gel; and G3= saline (control). After 10 days of storage in 100% humidity at 37 degrees C, the dressings were removed and the root canals were filled with Epiphany sealer. After additional 48 h of storage, the specimens were sectioned transversally into 2-mm-thick discs. Push-out tests were performed (1 mm/min, Instron 4411) and the maximum loads at failure were recorded in MPa. One-way ANOVA and Newman-Keuls tests showed a statistically significant decrease in bond strength when a Ca(OH)2 dressing was used before root canal filling with Epiphany (G1= 10.18 +/- 1.99 and G2= 9.98 +/- 2.97) compared to the control group (13.82 +/- 3.9) (p< 0.05). It may be concluded that the use of Ca(OH)2 as an intracanal dressing material affected the adhesion of Epiphany to the root canal walls, but even though the values were within the acceptable range found in the literature.