新型根管封闭剂理化性能评价
Evaluation of Physicochemical Properties of a New Root Canal Sealer.
机构信息
Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
School of Dentistry of Sobral, Federal University of Ceara, Campus Sobral, Sobral, Ceara, Brazil.
出版信息
J Endod. 2018 Mar;44(3):501-505. doi: 10.1016/j.joen.2017.09.017. Epub 2017 Dec 16.
INTRODUCTION
The aim of this study was to evaluate some of the physicochemical properties of a new root canal sealer.
METHODS
The sealers tested were Sealer Plus compared with AH Plus. For the radiopacity, flow, solubility, and fabrication of test specimens relative to setting times, the American National Standards Institute/American Dental Association No. 57 (2000) and International Organization for Standardization 6876 (2012) specifications were followed. To measure the initial and final setting times, the ASTM C266/2008 standard was used. pH was evaluated in the time intervals of 3, 24, 72, and 168 hours. Statistical tests were applied to the results obtained at a level of significance of 5%.
RESULTS
The results demonstrated that the Sealer Plus sealer showed a lower radiopacity value than AH Plus sealer (P < .05); however, this was higher than the minimum value recommended by the specifications (ie, 3 mm Al). Relative to flow, the value for Sealer Plus was 19.19 mm and for AH Plus, 19.81 mm (P > .05). Sealer Plus presented initial and final setting times of 138 minutes and 210 minutes, respectively, whereas the values for AH Plus were 437 minutes and 849 minutes, respectively (P < .05). Relative to solubility, Sealer Plus presented 0.21% and AH Plus, 0.27% (P > .05). None of the sealers showed a significant increase in pH (P > .05).
CONCLUSIONS
Sealer Plus sealer presented physicochemical properties in accordance with American National Standards Institute/American Dental Association (2000) No. 57 and International Organization for Standardization 6876 (2012) specifications.
简介
本研究旨在评估一种新型根管封闭剂的某些理化性能。
方法
所测试的封闭剂为 Sealer Plus 与 AH Plus 进行比较。对于射线不透性、流动性、溶解度和试件制备相对于凝固时间，遵循美国国家标准协会/美国牙科协会第 57 号标准（2000 年）和国际标准化组织第 6876 号标准（2012 年）。为了测量初始凝固时间和最终凝固时间，使用 ASTM C266/2008 标准。在 3、24、72 和 168 小时的时间间隔评估 pH 值。将统计检验应用于获得的结果，置信水平为 5%。
结果
结果表明，Sealer Plus 封闭剂的射线不透性值低于 AH Plus 封闭剂（P<0.05）；然而，这高于规范推荐的最低值（即 3mm Al）。与流动性相比，Sealer Plus 的数值为 19.19mm，而 AH Plus 的数值为 19.81mm（P>0.05）。Sealer Plus 的初始凝固时间和最终凝固时间分别为 138 分钟和 210 分钟，而 AH Plus 的分别为 437 分钟和 849 分钟（P<0.05）。相对溶解度，Sealer Plus 为 0.21%，AH Plus 为 0.27%（P>0.05）。没有一种密封剂的 pH 值有显著增加（P>0.05）。
结论
Sealer Plus 密封剂的理化性能符合美国国家标准协会/美国牙科协会（2000 年）第 57 号标准和国际标准化组织第 6876 号标准（2012 年）。
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