Hammad Mohammad, Qualtrough Alison, Silikas Nick
School of Dentistry, University of Manchester, Manchester, United Kingdom.
J Endod. 2008 Jan;34(1):90-3. doi: 10.1016/j.joen.2007.10.014.
The aim of this study was to investigate the polymerization shrinkage behavior of newly introduced root canal sealers. Three recently developed sealers; EndoRez (dual cure resin-based), RealSeal (dual cure resin-based), and GuttaFlow (silicon-based) were tested and compared with TubliSeal (zinc oxide-eugenol-based). The bonded disk method was used. Sixty specimens were tested at body and room temperatures. Dual cure resin-based sealers were tested as chemically cured only and as dual cured. Samples were tested for 24 hours. It was found that there were statistically significant differences between the tested sealers. EndoRez had the highest shrinkage-strain value, followed by RealSeal, whereas TubliSeal had the lowest. GuttaFlow exhibited expansion on polymerization. It was concluded that shrinkage associated with setting might jeopardize the seal of the root canal, leading to root canal failure.
本研究的目的是调查新引入的根管封闭剂的聚合收缩行为。测试了三种最近开发的封闭剂：EndoRez（双固化树脂基）、RealSeal（双固化树脂基）和GuttaFlow（硅基），并与TubliSeal（氧化锌丁香酚基）进行比较。采用粘结圆盘法。在体温和室温下测试了60个样本。双固化树脂基封闭剂仅作为化学固化和双固化进行测试。样本测试24小时。结果发现，测试的封闭剂之间存在统计学上的显著差异。EndoRez的收缩应变值最高，其次是RealSeal，而TubliSeal的收缩应变值最低。GuttaFlow在聚合时表现出膨胀。得出的结论是，与固化相关的收缩可能会危及根管的封闭，导致根管治疗失败。
