Do dental mouth guards change how you bite?

They can!: Dental mouthguards can act like physical devices which causes re-distribution of muscle forces in the jaws as well as re-distribution of bite forces. This in turn can cause a change in your bite at times. Consult your dentist or an orofacial pain dentist.

Sometimes: Bite guards can change your bite by relaxing the closing muscles that position your lower jaw. These changes are typically short term upon removing the guard in the morning and the bite goes back in a short period of time. Sometimes there is a significant seating of the jaw into the TMJ and there may be a need to adjust or equilibrate your bite.