Azar Mr, Khojastehpour L, Iranpour N
Assistant Professor, Department of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Dent (Tehran). 2011 Winter;8(1):19-24. Epub 2011 Mar 31.
Application of chemical solvents especially in problematic canals is usually a part of the retreatment process. This study was performed to compare the solubility of Gutta-Percha and Resilon in chloroform and to find the effect of sample thickness as well as the time of shaking on their solubility.
Specific weight of Resilon and gutta-percha was placed in a sample tube and after adding 1.0 ml of chloroform at 37ºC, the tubes were capped and shaked for 1, 3 and 5 minutes. The amount of non dissolved material was determined by reweighting of each sample and the percent of solubility was assessed according to the exact weight loss of the samples. The procedure was repeated three times for a given thickness and time of shaking. The difference in the solubility of Gutta-Percha and Resilon as well as the effect of sample thickness and time of shaking on solubility were assessed by repeated measurement ANOVA (p<0.05).
Resilon has significantly higher solubility than Gutta-Percha in chloroform (p<0.05). Resilon as well as Gutta-Percha Solubility are increased significantly over the time .The amount of solubility is not affected by sample thickness.
Comparison of Resilon and Gutta-Percha solubility in chloroform shows that one of the advantages for Resilon could be the chance for using possible safer organic solvents during retreatment.
化学溶剂的应用，尤其是在有问题的根管中，通常是再治疗过程的一部分。本研究旨在比较牙胶和热塑牙胶在氯仿中的溶解度，并探究样品厚度以及振荡时间对其溶解度的影响。
将牙胶和热塑牙胶的比重置于样品管中，在37℃下加入1.0毫升氯仿后，盖上管盖并振荡1、3和5分钟。通过重新称量每个样品来确定未溶解物质的量，并根据样品的精确重量损失评估溶解度百分比。对于给定的厚度和振荡时间，该过程重复三次。通过重复测量方差分析评估牙胶和热塑牙胶溶解度的差异以及样品厚度和振荡时间对溶解度的影响（p<0.05）。
热塑牙胶在氯仿中的溶解度显著高于牙胶（p<0.05）。随着时间的推移，热塑牙胶和牙胶的溶解度均显著增加。溶解度不受样品厚度的影响。
牙胶和热塑牙胶在氯仿中溶解度的比较表明，热塑牙胶的优势之一可能是在再治疗过程中有机会使用可能更安全的有机溶剂。
