Kim Young Kyung, Mai Sui, Haycock John R, Kim Sung Kyo, Loushine Robert J, Pashley David H, Tay Franklin R
Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu, Korea.
J Endod. 2009 Sep;35(9):1264-9. doi: 10.1016/j.joen.2009.05.008. Epub 2009 Jun 28.
This study evaluated the true self-etching potential of RealSeal and RealSeal SE to ensure that they are aggressive enough to etch through endodontic smear layers and demineralize the intact radicular dentin without adjunctive use of ethylenediaminetetraacetic acid (EDTA).
Mixed RealSeal and RealSeal SE were applied to (1) instrumented canal wall dentin that was irrigated with water as the final rinse to preserve smear layers, (2) fractured radicular dentin that was devoid of smear layers, and (3) instrumented canal wall dentin that was irrigated with EDTA as the final rinse to remove smear layers. Sealer-bonded specimens were processed for transmission electron microscopy.
Unlike RealSeal, RealSeal SE could hardly demineralize the fractured dentin and was unable to etch beyond smear layers into the underlying intact dentin. EDTA dissolved smear layers completely and partially demineralized the intact dentin..
RealSeal SE might not be aggressive enough to achieve optimal dentin bonding to root canal walls in locations that are not reachable by calcium chelating irrigants. Conversely, RealSeal possesses mild etching ability on the fractured and smear layer-covered radicular dentin.
本研究评估了RealSeal和RealSeal SE的真正自酸蚀潜力，以确保它们具有足够的侵蚀性，能够蚀刻穿牙髓涂片层并使完整的根管牙本质脱矿，而无需辅助使用乙二胺四乙酸（EDTA）。
将混合的RealSeal和RealSeal SE应用于：（1）用清水作为最终冲洗液冲洗以保留涂片层的预备根管壁牙本质；（2）没有涂片层的根折牙本质；（3）用EDTA作为最终冲洗液冲洗以去除涂片层的预备根管壁牙本质。对密封剂粘结的标本进行透射电子显微镜检查。
与RealSeal不同，RealSeal SE几乎不能使根折牙本质脱矿，并且无法蚀刻穿涂片层进入其下方的完整牙本质。EDTA完全溶解了涂片层，并使完整牙本质部分脱矿。
在钙螯合剂冲洗液无法到达的部位，RealSeal SE可能没有足够的侵蚀性来实现与根管壁的最佳牙本质粘结。相反，RealSeal对根折和覆盖有涂片层的根管牙本质具有轻度蚀刻能力。
