Land M F, Couri C C, Johnston W M
Department of Restorative Dentistry, Southern Illinois University, School of Dental Medicine, Alton, USA.
J Prosthet Dent. 1996 Nov;76(5):477-82. doi: 10.1016/s0022-3913(96)90004-9.
The effect of hemostatic agents, other than a 15.5% Fe2(SO4)3 solution, on prepared tooth structure is unknown. The purpose of this study was to (1) compare the effect of six commonly used hemostatic solutions and two nondental astringents on the dentinal smear layer and (2) determine whether different responses caused by product and/or time could be established. Standardized dentinal smear layers were exposed to eight astringent solutions for 30, 120, and 300 seconds (n = 6). A total of 144 SEM photographs at x2400 magnification were ranked according to predetermined criteria for five categories of smear layer removal and etching of underlying tooth structure. There were significant differences (p < 0.001) caused by the solution, exposure time, and their interaction. Greatest smear layer removal was observed with 21.3% AlCl3-6 hydrate, 8% racemic epinephrine HCl, and 15.5% Fe2(SO4)3 solutions at longer exposures. These caused significantly more removal than did almost pH neutral tetrahydrozoline or oxymetazoline (p < 0.05).
除15.5%的Fe2(SO4)3溶液外，其他止血剂对预备牙齿结构的影响尚不清楚。本研究的目的是：（1）比较六种常用止血溶液和两种非牙科收敛剂对牙本质玷污层的影响；（2）确定是否能明确由产品和/或时间引起的不同反应。将标准化的牙本质玷污层暴露于八种收敛剂溶液中30秒、120秒和300秒（n = 6）。根据预定标准，对144张放大2400倍的扫描电子显微镜照片在玷污层去除和底层牙齿结构蚀刻的五个类别上进行排序。溶液、暴露时间及其相互作用产生了显著差异（p < 0.001）。在较长暴露时间下，使用21.3%的六水合AlCl3、8%的消旋肾上腺素HCl和15.5%的Fe2(SO4)3溶液时，观察到玷污层去除效果最佳。与几乎呈pH中性的四氢唑啉或羟甲唑啉相比，这些溶液导致的玷污层去除显著更多（p < 0.05）。
