Valois Caroline R A, Costa Edson D
University of Brasília, Brazil.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2004 Jan;97(1):108-11. doi: 10.1016/s1079-2104(03)00359-7.
The purpose of this study was to compare the ability of different thicknesses of mineral trioxide aggregate (MTA) to prevent apical leakage through the use of a protein-dye complex with Coomassie Brilliant Blue G. Sixty-four teeth were divided into 4 groups, then filled with MTA to depths of 1, 2, 3, or 4 mm. Two teeth served as the positive controls. Another 2 teeth served as the negative controls. Root-filled teeth were mounted in an apparatus and then challenged with protein solution. The evaluation was conduced at 24-hour intervals for 60 days. The 1-mm-thick MTA was the least effective in preventing apical leakage (P <.05). No significance difference was found between 2- and 3-mm-thick MTA (P >.05). Four-millimeter-thick MTA was significantly more effective than the other thicknesses tested (P <.05). The results of this study suggest that the thickness of 4 mm is most adequate for the use of MTA as a root-end filling material.
本研究的目的是通过使用考马斯亮蓝G蛋白质染料复合物，比较不同厚度的三氧化矿物凝聚体（MTA）防止根尖渗漏的能力。64颗牙齿分为4组，然后用MTA填充至1、2、3或4毫米的深度。2颗牙齿作为阳性对照。另外2颗牙齿作为阴性对照。将根管充填后的牙齿安装在一个装置中，然后用蛋白质溶液进行挑战。在60天内每隔24小时进行一次评估。1毫米厚的MTA在防止根尖渗漏方面效果最差（P<.05）。2毫米和3毫米厚的MTA之间未发现显著差异（P>.05）。4毫米厚的MTA比其他测试厚度显著更有效（P<.05）。本研究结果表明，4毫米的厚度最适合将MTA用作根尖充填材料。
