Hashem Ahmed Abdel Rahman, Hassanien Ehab E
Faculty of Dentistry, Ain Shams University, Cairo, Egypt.
J Endod. 2008 Jan;34(1):59-61. doi: 10.1016/j.joen.2007.09.007.
The ability of two mineral trioxide aggregate (MTA) compounds and Intermediate Restorative Material (IRM) to seal large furcation perforations were evaluated using a dye-extraction leakage method. The furcation perforations were repaired with and without the use of internal matrix before placement of repair material. Eighty extracted human mandibular first molars were divided into positive (n = 10), negative (n = 10), and three experimental groups (n = 20) according to the repair material used. Each experimental group was divided into two subgroups (n = 10) according to whether internal matrix was used or not. Dye leakage was tested from an orthograde direction, and dye extraction was performed using full concentration nitric acid. Dye absorbance was measured at 550 nm using spectrophotometer. ProRoot MTA (Maillfer, Dentsply, Switzerland) with and without internal matrix and MTA-Angelus (Angelus, Londrina, PR, Brazil) with internal matrix showed the least dye absorbance. IRM (Caulk, Dentsply, Milford, DE) without internal matrix showed the highest dye absorbance. IRM with internal matrix and MTA-Angelus without internal matrix had insignificant difference and came at intermediate level between the other groups.
采用染料提取渗漏法评估了两种三氧化矿物凝聚体（MTA）材料和中间修复材料（IRM）封闭大型根分叉穿孔的能力。在放置修复材料之前，分别在使用和不使用内部基质的情况下修复根分叉穿孔。根据所使用的修复材料，将80颗拔除的人类下颌第一磨牙分为阳性组（n = 10）、阴性组（n = 10）和三个实验组（n = 20）。每个实验组根据是否使用内部基质再分为两个亚组（n = 10）。从垂直方向测试染料渗漏情况，并使用全浓度硝酸进行染料提取。使用分光光度计在550 nm处测量染料吸光度。使用和不使用内部基质的ProRoot MTA（Maillfer，登士柏，瑞士）以及使用内部基质的MTA-Angelus（Angelus，隆德里纳，巴拉那州，巴西）显示出最低的染料吸光度。不使用内部基质的IRM（Caulk，登士柏，米尔福德，特拉华州）显示出最高的染料吸光度。使用内部基质的IRM和不使用内部基质的MTA-Angelus之间差异不显著，处于其他组之间的中间水平。
