HB 1045 Signed into Law Dental hygienists soon can administer silver diamine fluoride in cooperation with a dentist. On Thursday, March 22, Governor John Hickenlooper signed HB18-1045 into law. The bill authorizes dental hygienists, who have received appropriate training, to administer SDF when working in cooperation with a dentist. Prior to the passage of this bill, the Colorado Dental Board …