用几丁质酸改性的树脂密封剂的理化性能和根尖封闭能力的比较评价。
Comparative Evaluation of Physicochemical Properties and Apical Sealing Ability of a Resin Sealer Modified with Pachymic Acid.
机构信息
Department of Conservative Dentistry and Endodontics, SRM Dental College, Bharathi Salai, Ramapuram, Chennai, India.
出版信息
Eur Endod J. 2020 Feb 28;5(1):23-27. doi: 10.14744/eej.2019.68442. eCollection 2020.
OBJECTIVE
The addition of pachymic acid (PA) to AH Plus (an epoxy resin sealer) offsets the cytotoxicity of the latter. Prior to the clinical implementation of this formulation, a thorough knowledge of its physicochemical properties and sealing ability becomes mandatory. Hence, this in vitro study aimed to characterize and evaluate the physicochemical properties and apical sealing ability of AH Plus (AHP) with and without the addition of PA.
METHODS
Flow, setting time, film thickness, solubility and radiopacity of AHP (group 1) and AHP modified with PA (AHP/PA, group 2) were evaluated in accordance with the guidelines put forth by ISO 6876:2012. The percentage was determined under each parameter. Apical sealing ability was assessed using fluid filtration device. An independent samples t-test was used for inter- and intra-group comparisons of mean fluid flow (MFF).
RESULTS
Incorporating PA to AHP decreased its flow, setting time and film thickness by 24.34%, 2.14% and 31.71% respectively. The solubility of group 2 increased on day 1 by 85.71% and decreased on days 3, 7 and 14 by 46.67%, 34.79% and 13.8% respectively. The radiopacity of AHP was not altered by the addition of PA. MFF rates of group 2 was significantly higher than group 1 on day 1, but not significantly different on day 7.
CONCLUSION
AHP/PA exhibited physicochemical properties that were within the requirements of ISO and with time, and showed fluid flow similar to AHP.
目的
添加厚层酸（PA）可抵消后者的细胞毒性环氧树脂密封剂 AH Plus。在这种配方临床应用之前，必须充分了解其物理化学性质和密封能力。因此，本体外研究旨在对添加和未添加 PA 的 AH Plus（AHP）的物理化学性质和根尖密封能力进行特征描述和评估。
方法
根据 ISO 6876:2012 规定的指南评估 AHP（第 1 组）和用 PA 改性的 AHP（AHP/PA，第 2 组）的流动、凝固时间、膜厚度、溶解度和射线可透性。每个参数下的百分比。使用流体过滤装置评估根尖密封能力。采用独立样本 t 检验对平均流体流动（MFF）的组间和组内比较进行分析。
结果
将 PA 掺入 AHP 可使 AHP 的流动、凝固时间和膜厚度分别降低 24.34%、2.14%和 31.71%。第 2 组在第 1 天的溶解度增加了 85.71%，在第 3、7 和 14 天分别减少了 46.67%、34.79%和 13.8%。添加 PA 后 AHP 的射线不透性没有改变。第 2 组的 MFF 率在第 1 天明显高于第 1 组，但在第 7 天无明显差异。
结论
AHP/PA 表现出符合 ISO 要求的物理化学性质，且随着时间的推移，其流体流动性能与 AHP 相似。
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