Are mouthguards supposed to stay in place?

Yes! Since they can’t protect your teeth if they don’t stay in place, a good fit is important. Unlike store-bought mouthguards, custom mouthguards are made using impressions of your teeth. This means they will fit you perfectly, with no frustrating boil-and-bite process needed. A mouthguard that fits well is also more comfortable, so you won’t be tempted to not wear it.