The objective of this study was to evaluate the effect of sodium hypochlorite and chlorhexidine solutions and their inactivating agents on the push-out bond strength of mineral trioxide aggregate (MTA). One hundred fifty root slices were prepared and their root canal spaces were enlarged using diamond burs. MTA was prepared and compacted to root canal spaces. The samples were randomly separated to 4 groups that would be immersed into the selected solutions (5.25% sodium hypochlorite (NaOCl), 5.25% NaOCl and sodium thiosulfate, 2% chlorhexidine (CHX), 2% CHX and a mixture of Tween 80 and 0.3% L-alfa-lecithin) and a control group (n = 30). Push-out bond strength of each specimen was tested with universal testing machine. The data was analyzed by one-way analysis of variance and Tukey tests. There were no significant differences between the push-out bond strength values of the irrigation groups and the control group. A significant difference was found between the push-out bond strength values of NaOCl-Sodium thiosulfate and CHX-L-alpha-lecithin groups. Contact with NaOCl and its neutralizing agent with MTA after 10 minutes of setting period increased the push-out bond strength of MTA. On the other hand, any contact with CHX alone or with subsequent application using L-alfa-lecithin should be avoided since that might decrease the push-out bond strength of freshly mixed MTA.

中文翻译：

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次氯酸钠和洗必泰冲洗液及其灭活剂对三氧化二矿骨料推出强度的影响。

这项研究的目的是评估次氯酸钠和洗必泰溶液及其灭活剂对三氧化二矿骨料（MTA）推出强度的影响。准备了150个根切片，并使用金刚砂扩大了其根管空间。准备MTA并压紧至根管间隙。将样品随机分为4组，将其浸入选定的溶液中（5.25％的次氯酸钠（NaOCl），5.25％的NaOCl和硫代硫酸钠，2％的洗必太（CHX），2％的CHX以及Tween 80和0.3的混合物％L-α-卵磷脂）和对照组（n ＝ 30）。用万能试验机测试每个样品的推出强度。通过单因素方差分析和Tukey检验分析数据。灌溉组和对照组的推顶粘结强度值之间没有显着差异。发现NaOCl-硫代硫酸钠和CHX-L-α-卵磷脂基团的推出键强度值之间存在显着差异。凝固时间为10分钟后，与NaOCl及其中和剂与MTA接触会增加MTA的推出粘结强度。另一方面，应避免与CHX单独接触或随后与使用L-α-卵磷脂的任何接触，因为这可能会降低新鲜混合的MTA的推出粘合强度。凝固时间为10分钟后，与NaOCl及其中和剂与MTA接触会增加MTA的推出粘结强度。另一方面，应避免与CHX单独接触或随后与使用L-α-卵磷脂的任何接触，因为这可能会降低新鲜混合的MTA的推出粘合强度。凝固时间为10分钟后，与NaOCl及其中和剂与MTA接触会增加MTA的推出粘结强度。另一方面，应避免与CHX单独接触或随后与使用L-α-卵磷脂的任何接触，因为这可能会降低新鲜混合的MTA的推出粘合强度。