Because Opal Seal is relatively new, some dentists and hygienists are not yet aware of it.
If you go in for a dental cleaning, they may not know what it is and try to scrape it off.
You can help us—and your smile—by telling them it's Opal Seal. Let them know why it's there and that it should not be removed. If they ask, tell them they can simply clean and floss around it.