Crowns and Fillings Don’t Last Forever — But Here’s How toMake Them Last Longer By Dr. Cohen, DDS ​ Crowns and fillings are designed to restore and protect your teeth—but they’re not indestructible. Over time, they can wear down, crack, or fail, often because of everyday habits patients don’t realize are causing damage. ​ The good news? Three simple secrets can dramatically extend the life of your dental work. ​ Secret #1: Treat Your Crowns and Fillings Like Real Teeth Crowns