Batchu Hanu, Chou Hwai-Nan, Rakowski Duane, Fan P L
Critical Issues Research, Division of Science, American Dental Association, 211 E. Chicago Avenue, Chicago, IL 60611, USA.
J Am Dent Assoc. 2006 Oct;137(10):1419-25. doi: 10.14219/jada.archive.2006.0055.
Dental practices use disinfectants or line cleaners to flush dental unit wastewater lines to minimize odor generation, remove solid waste particles and remove biofilms in dental unit water lines (DUWLs).
The authors evaluated 47 disinfectants or line cleaners for their potential to release mercury from amalgam waste. They prepared each product concentration according to the manufacturer's recommendations and gently agitated it along with one amalgam specimen for 24 hours. They filtered the combined decanted liquid and rinse and analyzed it for mercury using modified U.S. Environmental Protection Agency method 245.1.
Six preparations released significantly more mercury from amalgam (about 17 to 340 times) than did the deionized water control (P < .001). The amount of mercury released by the other disinfectants/line cleaners was not statistically different from that released by the control. The pH values of all preparations ranged from 1.76 to 12.35.
This study and other published reports have demonstrated that preparations containing chlorine release more mercury from amalgam than did some other products and the deionized water control. As a result, the use of these products is not recommended for treating dental office wastewater lines or DUWLs.
牙科诊所使用消毒剂或管路清洁剂冲洗牙科设备废水管路，以尽量减少气味产生、清除固体废物颗粒并去除牙科设备水管（DUWLs）中的生物膜。
作者评估了47种消毒剂或管路清洁剂从汞合金废物中释放汞的可能性。他们根据制造商的建议配制每种产品的浓度，并将其与一个汞合金样本一起轻轻搅拌24小时。他们对混合后的倾析液和冲洗液进行过滤，并使用改良的美国环境保护局方法245.1对其汞含量进行分析。
六种制剂从汞合金中释放的汞明显多于去离子水对照（约17至340倍）（P <.001）。其他消毒剂/管路清洁剂释放的汞量与对照释放的汞量在统计学上没有差异。所有制剂的pH值范围为1.76至12.35。
本研究和其他已发表的报告表明，含氯制剂从汞合金中释放的汞比其他一些产品和去离子水对照更多。因此，不建议使用这些产品处理牙科诊所废水管路或DUWLs。
