Timing for Composite Resin Placement on Mineral Trioxide Aggregate
Timing for Composite Resin Placement on Mineral Trioxide Aggregate
复制标题
DOI：
10.1016/j.joen.2013.06.009
复制
发表时间：
2013-09-01
影响因子：
4.2
通讯作者：
Hayashi, Yoshihiko
中科院分区：
文献类型：
--
作者：
Tsujimoto, Masaki;Tsujimoto, Yasuhisa;Hayashi, Yoshihiko
前言：本研究的目的是探讨在三氧化二铝骨料(MTA)上修复复合树脂的合适时机。方法：将35个MTA块分成7组，分别选择10min、1d、7d三种不同的修复时间(10min、1d、7d)，分别用粘结树脂修复和不粘结修复，并与对照组进行比较。21天后，用扫描电子显微镜(X2000倍)测量MTA与复合树脂或MTA与粘结剂在长轴方向的距离。MTA在复合树脂附近的硬度以维氏显微硬度表示。结果：粘结剂粘结剂10min组、粘结剂1d组、粘结剂7d组界面无缝隙。在1天和7天时，没有粘结剂的组在界面上出现了分离或缝隙。无论有无粘结剂，1d组的维氏硬度均显着低于其他组。结论：这些发现表明，在MTA上添加粘结剂的复合树脂在一次就诊后几乎可以立即修复MTA。
Introduction: The aim of this study was to investigate the proper time to restore composite resin over mineral trioxide aggregate (MTA). Methods: Thirty-five samples of MTA blocks were divided into 7 groups with 3 different times (10 minutes, 1 day, and 7 days) selected for restoring the composite resin over MTA with and without bonding resin, and a control group was included for comparison. After 21 days, the distances between MTA and the composite resin or between MTA and the bonding agent on sectioned planes along the long axis were measured using a scanning electron microscope (x2,000 magnification). The hardness of the MTA near the composite resin was presented as the Vickers microhardness. Results: There were no gaps at the interface in the 10-minute groups, the 1-day group with a bonding agent, and the 7-day group with a bonding agent. The groups without a bonding agent at 1 and 7 days presented a separation or gap at the interface. The value of the Vickers microhardness in the 1-day groups was significantly decreased compared with those of the other groups regardless of the presence or absence of a bonding agent. Conclusions: These findings suggest that composite resin with a bonding agent over MTA can be restored almost immediately after MTA mixing during a single visit.