Formaldehyde release from root-canal sealers: influence of method
Formaldehyde release from root-canal sealers: influence of method
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DOI：
10.1046/j.1365-2591.1999.00173.x
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发表时间：
1999-01-01
影响因子：
5
通讯作者：
Koch, MJ
中科院分区：
文献类型：
--
作者：
Koch, MJ
目的检测三种不同根管封闭剂（酚醛树脂、环氧树脂和多聚甲醛氧化锌丁香油酚粘固剂）的甲醛释放量，方法分别测定新鲜混合材料和放置2天或2周的标本的甲醛释放量。测试了不同的混合比和样本量。结果分析表明，混合比、混合后时间和试件的表面积与重量比对不同材料的甲醛释放量有不同的影响。结论从本研究的结果来看，很难确定一个标准化的体外试验，可以普遍适用于确定性测定根管洁治剂的甲醛释放量。根管封闭剂体内甲醛释放的预测是困难的。
Aim To examine formaldehyde release from three different root-canal sealers: one phenol resin, one epoxy resin and one paraformaldehyde containing zinc oxide eugenol cement.Methodology Formaldehyde was measured from freshly mixed material and from specimens allowed to set for 2 days or 2 weeks. Different mixing ratios and sample sizes were tested. Analysis was performed by reacting formaldehyde with acetylacetone and ammonia to form diacetyldihydrolutidine, which was revealed by spectrophotometry.Results Analysis revealed that mixing ratio, time after mixing and surface:weight ratios of specimens had different influences on the formaldehyde release from different materials.Conclusions From the results of this study it is difficult to define a standardized in-vitro test that can be applied universally fur the definitive determination of formaldehyde release from endodontic scalers. Prediction of in-vivo formaldehyde release from endodontic sealers is difficult.