From bathroom sinks to decorative figurines, many products made of feldspathic porcelain naturally contain traces of lead. This is true of dental crowns, which came under scrutiny last year along with other Chinese-manufactured imports that were suspected of containing a dangerously high amount of lead. In response, the American Dental Association recently set out to determine if porcelain-metal crowns of both international and domestic origin release lead at levels that would warrant concern.
Testing finished crowns (like those you would have implanted by a dentist) under acidic and temperature conditions far more extreme than orally possible, scientists found that no measurable amount of lead could escape. Additionally, they tested dissolved crowns and raw-material powders to check for lead effusion, and found levels ranging from undetectable to 113 parts per million-practically nonexistent.
“Based on all the information to date, both from our own testing as well as reports of other analyses, we are confident that no measurable levels of lead are released from dental crowns made from dental porcelain typical of available sources,” stated Clifton Carey, Ph.D., administrative director of the ADA’s Paffenbarger Research Center.
If you need to repair or replace a broken tooth or wish to make your smile appear straight, you can rest assured that your dentist’s recommendation of crowns is a safe one.
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