Vanderweele Richard A, Schwartz Scott A, Beeson Thomas J
Department of Endodontics, Lakenheath Air Base, UK.
J Endod. 2006 May;32(5):421-4. doi: 10.1016/j.joen.2005.09.007.
Simulated furcation perforations were repaired with and without blood contamination utilizing tooth-colored mineral trioxide aggregrate (MTA) mixed with either MTA liquid (sterile water), lidocaine, or saline. Samples underwent Instron testing at either 24 or 72 hours and at 7 days. Data were analyzed using a 3-way ANOVA and post-hoc testing using Turkey's true test for significance. All of the 72-hour samples displayed significantly greater resistance to displacement than the 24-hour samples. All of the 7-day samples displayed significantly greater resistance to displacement than the 24-hour and 72-hour samples. Non-contaminated samples displayed significantly greater resistance to displacement than their blood-contaminated counterparts at 7 days. Non-contaminated samples mixed with sterile water, lidocaine, or saline performed similarly at all time periods. Allowing tooth-colored MTA to set undisturbed for 72 hours or longer prior to placement of a coronal restoration may decrease the chance of MTA displacement in furcation perforation repairs.
使用与MTA液体（无菌水）、利多卡因或生理盐水混合的牙色三氧化矿物凝聚体（MTA）修复模拟根分叉穿孔，分别有无血液污染的情况。样本在24小时或72小时以及7天时进行Instron测试。使用三因素方差分析和采用Turkey真实检验的事后检验对数据进行分析以确定显著性。所有72小时的样本显示出比24小时的样本对位移的抵抗力显著更强。所有7天的样本显示出比24小时和72小时的样本对位移的抵抗力显著更强。在7天时，未受污染的样本比受血液污染的对应样本对位移的抵抗力显著更强。与无菌水、利多卡因或生理盐水混合的未受污染样本在所有时间段的表现相似。在放置冠修复体之前，让牙色MTA不受干扰地凝固72小时或更长时间，可能会降低MTA在根分叉穿孔修复中发生位移的几率。
