Tyagi Sakshi, Choudhary Ekta, Choudhary Ashish, Chauhan Rajat
Department of Conservative Dentistry and Endodontics, School of Dental Sciences, Sharda University, Greater Noida, Uttar Pradesh, India.
Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, Sharda University, Greater Noida, Uttar Pradesh, India.
Int J Clin Pediatr Dent. 2020 Jan-Feb;13(1):35-37. doi: 10.5005/jp-journals-10005-1741.
This study evaluates epoxy resin-based sealers after their final set, immersed in Endosolve-R or xylene for 1-2 minutes, for its easy removal mechanically after softening.
Sixty Teflon molds were grouped with 20 samples in each of the three commercially available sealers, i.e., AH 26, AH Plus, and Adseal. The sealers were put in the specific molds after their manipulation as per the instructions given in the literature by the manufacturer. They were allowed to harden for 2 weeks at 37°C in 100% humidity. Two subgroups, A-Xylene and B-Endosolv-R, of 10 samples each, were formed from 20 set specimens based on solvents to which they were immersed for 1 and 2 minutes, respectively. The data obtained was subjected to the Mauchly's test one-way ANOVA and two-way ANOVA for analysis.
It was proved that for all the sealers immersed in solvents, there was a significant reduction in the mean Vickers hardness as the time increases. There was a significant difference in the initial hardness between the mentioned sealers with AH plus showing the highest followed by AH 26 and Adseal showing the lowest. AH Plus and Adseal sealers were softened by xylene after 2 minutes of their initial microhardness ( < 0.001); least effect was seen on AH 26. After 2 minutes, Endosolv-R softened initial microhardness of all the three sealers ( < 0.001).
It was concluded that Endosolv-R was more effective in softening the epoxy-based resin sealer than xylene, after 2 minutes of exposure.
Tyagi S, Choudhary E, Choudhary A, A Comparative Evaluation of Two Commonly Used GP Solvents on Different Epoxy Resin-based Sealers: An Study. Int J Clin Pediatr Dent 2020;13(1):35-37.
本研究评估在最终凝固后浸泡于Endosolve-R或二甲苯中1 - 2分钟的环氧树脂类封闭剂，观察其在软化后是否易于机械去除。
60个聚四氟乙烯模具分为三组，每组20个样本，分别用于三种市售封闭剂，即AH 26、AH Plus和Adseal。按照制造商文献中给出的说明对封闭剂进行调配后放入特定模具中。在37°C、湿度100%的条件下使其硬化2周。基于浸泡的溶剂，从20个凝固后的样本中分别形成两个亚组，即A - 二甲苯组和B - Endosolv - R组，每组10个样本，分别浸泡1分钟和2分钟。对所得数据进行Mauchly检验、单向方差分析和双向方差分析。
结果表明，对于所有浸泡在溶剂中的封闭剂，随着时间增加，维氏硬度平均值显著降低。上述封闭剂的初始硬度存在显著差异，AH Plus最高，其次是AH 26，Adseal最低。AH Plus和Adseal封闭剂在初始显微硬度2分钟后被二甲苯软化（<0.001）；AH 26受影响最小。2分钟后，Endosolv - R使所有三种封闭剂的初始显微硬度软化（<0.001）。
得出结论，暴露2分钟后，Endosolv - R在软化环氧树脂类封闭剂方面比二甲苯更有效。
Tyagi S, Choudhary E, Choudhary A, 两种常用的牙胶溶剂对不同环氧树脂类封闭剂的比较评价：一项研究。《国际临床儿科牙科学杂志》2020；13(1):35 - 37。
