"WBNS-TV spent the past year probing into the presence of toxic lead in dental work such as crown, bridges and dentures. The team discovered a lack of state and federal regulation in the dental laboratory industry, an industry largely overlooked and unknown to the consumer until WBNS-TV broke the story in February 2008. An increasing number of laboratories outsource dental work to other companies. The FDA doesn't track the materials in foreign or domestic dental work. The lack of oversight results in patient risk.