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The article reports on mercury and arsenic levels among Lebanese dentists. The study also investigated the effects of age, gender, years of practice, and specialty on the mercury levels among those dentists. Amalgam is one of the most versatile and practical dental filling materials available. Mercury, which constitutes about 50% of amalgam, is the only metal which is liquid at room temperature, a property key to its success as a filling material. Its symptoms include effects on the central and peripheral nervous on the renal system.