An in vitro evaluation of environmental pH changes after root canal therapy with three different types of calcium hydroxide
An in vitro evaluation of environmental pH changes after root canal therapy with three different types of calcium hydroxide
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发表时间：
2013-01
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通讯作者：
M. Javidi;M. Zarei;Farzaneh Afkhami;Leila Mokhtari Amir Majdi
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作者：
M. Javidi;M. Zarei;Farzaneh Afkhami;Leila Mokhtari Amir Majdi
目的：测定3种市售氢氧化钙糊剂根管充填后环境pH值的变化。方法：选择32颗拔除的单根前磨牙，其中1颗为直根管。在根面上制备标准空洞。除空洞外，所有牙根表面均涂有指甲油。用Easy Race旋转系统预备根管。将受试者随机分为3组，分别用氢氧化钙糊剂充填：(1)Sure糊组、(2)Meta糊组、(3)MULT-CAL组。对照组2例。然后将牙齿放入10毫升生理盐水中。分别于1h、24h、48h和1周测定环境pH值。通过方差分析和图基检验对结果进行统计评估。结果：3组与1组比较，差异有统计学意义(P<0.05)。在模拟的牙根吸收缺陷中，与Sure糊剂和Meta糊剂相比，MultiCal的根管内放置导致了更高的pH。结论：在根尖诱导等pH值变化较长、消毒质量较高的情况下，最好使用多钙，短期使用时，多钙和Meta-Paste的消毒效果相同。
Objective: This study determined environmental pH changes after root canal dressing using 3 types of commercial calcium hydroxide pastes. Methods: Thirty-two extracted single-rooted human premolars with 1 straight root canal were selected. Standard cavities were prepared on root surfaces. All root surfaces, excluding the cavities, were covered with nail polish. Root canals were prepared using the Easy RaCe rotary system. The teeth were randomly divided into 3 experimental groups filled with calcium hydroxide pastes: (Group 1) Sure-Paste, (Group 2) Meta-Paste, and (Group 3) Multi-Cal. The control group had 2 samples. Teeth were then placed in 10 mL of normal saline. Environmental pH values were measured at 1 h, 24 h, 48 h, and 1 week. Statistical evaluations of the results were performed via the ANOVA and Tukey tests. Results: Results demonstrated that groups 3 and 1 showed a significant statistical difference (P.05). Intracanal placement of Multi-Cal compared with that of Sure-Paste and Meta-Paste resulted in a higher pH in simulated root resorption defects. Conclusion: In cases, like apexification, that need longer pH changes and higher disinfecting qualities, it might be better to use Multi-Cal, and for short-time use as disinfectant medicament Multi-Cal and Meta-Paste are equally effective.