Quantitation of total mercury vapor released during dental procedures.
Quantitation of total mercury vapor released during dental procedures.
复制标题
牙科手术期间释放的总汞蒸气的定量。
DOI：
10.1016/0109-5641(92)90078-q
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Okabe,T
中科院分区：
文献类型：
--
作者：
Engle,JH;Ferracane,JL;Wichmann,J;Okabe,T
本文介绍了一种测量常规牙科手术中三种汞合金释放的汞蒸气总量的试管法。结果发现，一种银汞合金在干抛光过程中汞的释放量最大(44μg)。在喷水和大容量排空的情况下，从I类空腔中去除汞齐也如预期的那样产生大量汞(15-20μg)。然而，在更临床相关的条件下，延长排空时间一分钟，以去除切割后残留的汞齐和汞，这一值减少了约90%。还测量了在放置(6-8μg)、湿抛光(2-4μg)和摩擦(1-2μg)过程中产生的汞的总量。研究表明，与汞齐相关的牙科手术确实有可能使患者和操作员暴露在汞蒸气中。然而，在任何程序中释放的汞总量远远低于根据监管机构为职业接触制定的每日门槛限值计算的总暴露水平。
Anin vitromethod is described in which measurements were made of the total amount of mercury vapor released from three types of amalgam during routine dental procedures. It was found that the greatest amount of mercury was released during dry polishing of one amalgam (44 μg). Removal of amalgam from a Class I cavity under water spray and high volume evacuation also generated large amounts of mercury as expected (15–20 μg). However, under the more clinically relevant conditions of extending evacuation for one minute to remove residual amalgam and mercury after cutting, this value was reduced by approximately 90%. The total amount of mercury generated during placement (6–8 μg), wet polishing (2–4 μg) and trituration (1–2 μg) were also measured. The study showed that dental procedures associated with amalgam do potentially expose the patient and operator to mercury vapor. However, the total amount of mercury released during any procedure was far below the total exposure level calculated from the daily threshold limits established by regulatory agencies for occupational exposure.