One of the biggest perks of Invisalign treatment is that the clear aligners cover your teeth for most of the day, making them feel a little protected. It’s easy to assume that because your teeth are tucked safely behind aligners, they’re less vulnerable to problems like tooth decay.

But surprisingly, cavities can still happen during Invisalign treatment—and in some cases, aligners can actually contribute to conditions that make cavities more likely if oral hygiene slips. The good news? Cavities during treatment are usually preventable, and catching them early can help keep your smile progress on track.