Dental amalgam controversy total global emissions. Mercury emissions from cremation are growing in the US, both because cremation rates are increasing and because the number of teeth in the deceased are increasing due to better dental care. Since amalgam restorations are very durable and relatively inexpensive, many of the older deceased have amalgam restorations. According to work done in Great Britain, mercury emissions from cremation are expected to increase until at least 2020. The American Dental Association (ADA) has asserted that dental amalgam is safe and has held that, "the removal of amalgam restorations from the non-allergic patient for the alleged purpose of
Amalgam (dentistry) problem. This phase has been shown to be the weakest phase in the set amalgam and is subject to corrosion, particularly at the tooth-amalgam interface. In 1962 a new amalgam alloy, called Dispersalloy, was introduced with the addition of a spherical silver-copper eutectic particle to the traditional lathe-cut AgSn particle in a ratio of 1:2. The mixture of these two types of particles is known as admix alloy. The benefits of this alloy was to strengthen the set amalgam and reduce the γ phase (SnHg). The increased copper in the silver-copper eutectic reacted preferentially with tin so that SnHg could