Is Mercury Polluting Water Plants from Amalgam Restorations?

Amalgam restorations, also known as silver fillings, have been used in dentistry for over 150 years. These fillings are made from a mixture of metals, including mercury. Despite concerns regarding the potential health effects of mercury, amalgam restorations are still widely used. One of the environmental concerns associated with these fillings is the potential for mercury to pollute water plants. In this article, we will explore the evidence behind this concern.

What is Mercury?

Mercury is a naturally occurring element that is found in the earth’s crust. It is used in a variety of products, including thermometers, batteries, and fluorescent light bulbs. Mercury is also found in dental amalgam, which contains about 50% mercury by weight. When mercury is released into the environment, it can convert to methylmercury, a highly toxic form of mercury that can accumulate in fish and other aquatic organisms.

How Does Mercury Pollute Water Plants?

Mercury from dental amalgam can enter the environment through various routes, including wastewater from dental offices, and through human waste. Once in the environment, mercury can contaminate water plants by either dissolving into the water or settling into sediment. When water plants absorb mercury, it can accumulate in their tissues, leading to toxic effects in the plants themselves and the ecosystems they support.

What are the Health Effects of Mercury Exposure?

Mercury is a neurotoxin, meaning that it can damage the nervous system. Exposure to high levels of mercury can cause symptoms such as tremors, memory loss, and mood swings. Long-term exposure to lower levels of mercury can also lead to health problems, including cardiovascular disease, immune system dysfunction, and developmental delays in children.

What Does the Research Say?

Several studies have looked at the potential for mercury from dental amalgam to pollute water plants. One study found that water plants located near dental facilities had higher levels of mercury than plants located further away. Another study found that aquatic plants absorbed and stored mercury when exposed to water contaminated with mercury from dental facilities. However, not all studies have found a significant association between dental amalgam and mercury pollution in water plants.

Conclusion

While the evidence regarding the potential for mercury from dental amalgam to pollute water plants is mixed, it highlights the importance of proper disposal of mercury-containing materials. Dental offices should follow best management practices for reducing the release of mercury into the environment, including the use of amalgam separators and proper disposal of waste. Individuals concerned about exposure to mercury from dental amalgam should speak with their dentist and consider alternative restorative materials.