Nightguards take the brunt of your clenching and grinding force, and are therefore prone to degradation over time. If you find that your nightguard is appearing cracked or worn, chances are it is time to get a new one.

After having extensive dental work completed, the shape or anatomy of your teeth will change and your current nightguard may no longer fit properly. In this case, a new nightguard will also be necessary as it is a custom-fitted appliance meant to conform to the contours of your teeth.