pH值和混合剂对牙色及灰色三氧化矿物凝聚体凝固时间的影响
Effects of pH and mixing agents on the temporal setting of tooth-colored and gray mineral trioxide aggregate.
作者信息
Watts J Dustin, Holt Dennis M, Beeson Thomas J, Kirkpatrick Timothy C, Rutledge Richard E
机构信息
Department of Endodontics, Wilford Hall Medical Center, Lackland AFB, TX 78236-5346, USA.
出版信息
J Endod. 2007 Aug;33(8):970-3. doi: 10.1016/j.joen.2007.01.024. Epub 2007 May 23.
The purpose of this study was to test the compressive strength of white mineral trioxide aggregate (WMTA) and gray mineral trioxide aggregate (GMTA) when mixed with sterile water or local anesthetic and exposed to an acidic environment. A total of 248 samples of WMTA and GMTA were mixed and placed in phosphate-buffered saline (PBS), at pH 5.0 or 7.4, for a period of 7 or 28 days. When WMTA and GMTA were mixed with local anesthetic, the following were observed: 1) pH 5.0 caused a significant decrease in compressive strength (p<0.0001); 2) WMTA was significantly stronger than GMTA (p<0.0001); and 3) more time in PBS (total 28 days) caused a significant decrease in compressive strength (p<0.001). There were no consistent differences in compressive strength for WMTA or GMTA when mixed with sterile water. Variability of results suggests both types of MTA be mixed with sterile water in acidic and neutral environments.
本研究的目的是测试白色三氧化矿物凝聚体（WMTA）和灰色三氧化矿物凝聚体（GMTA）在与无菌水或局部麻醉剂混合并暴露于酸性环境时的抗压强度。总共248个WMTA和GMTA样本被混合，并置于pH值为5.0或7.4的磷酸盐缓冲盐水（PBS）中7天或28天。当WMTA和GMTA与局部麻醉剂混合时，观察到以下情况：1）pH值为5.0时抗压强度显著降低（p<0.0001）；2）WMTA比GMTA显著更强（p<0.0001）；3）在PBS中放置更长时间（总共28天）会导致抗压强度显著降低（p<0.001）。当与无菌水混合时，WMTA或GMTA的抗压强度没有一致的差异。结果的变异性表明，在酸性和中性环境中，两种类型的MTA都应与无菌水混合。
Zotero 插件