Freya Koss, 73, Wynnewood, Pa., campaigned for an end to the use of mercury dental fillings outside the American Dental Association convention in Philadelphia in 2005.
Freya Koss, 73, Wynnewood, Pa., campaigned for an end to the use of mercury dental fillings outside the American Dental Association convention in Philadelphia in 2005. Courtesy of Freya Koss
Freya Koss, 73, Wynnewood, Pa., campaigned for an end to the use of mercury dental fillings outside the American Dental Association convention in Philadelphia in 2005. Courtesy of Freya Koss

After 150 years of evidence: Mercury fillings are safe and effective

August 10, 2015 12:00 AM

UPDATED November 12, 2015 11:34 PM