Night guard changing my bite?

It can: Is it a soft or a hard night guard if it is changing your bite need to stop wearing, have your dentist adjusted.

Things are ok: Depending on how long you have had your night gaurd it can cause some sensitivity and feel like your teeth or bite is off. The bite feels off mostly in the morning when you first take it out. Your dentist should have made you a bite stent to help reset your bite to its normal position. Basically your bite muscle need to be reset.

Possibly: A nightguard is a very sensitive splint that must be 'balanced' perfectly so that there are no interferences with your upper or lower teeth. The teeth that fit against the acrylic must all articulate at the same time or it may very well change your bite.

It's possible: Nightguards, by virtue of the fact that their plastic covers the chewing surfaces of the teeth, can 'deprogram' the muscles of your lower jaw that may have been compensating for a jaw discrepancy by artificially posturing your jaw forward into a more comfortable 'convenience' bite. When the muscles that position your jaw relax, with a change in jaw posture, it could result in a change in your bite.

Faulty Mouth Guard: Mouth guard is too short does not cover the last molar teeth. The usual bite change, front teeth do not touch when closing only the back teeth touch. This is noticed in 4 to 8 week after wearing a faulty mouth guard nightly. Good news, stop wearing mouth guard, usually all teeth will touch again, have a proper mouth guard made. If a dentist made this faulty mouth guard it should be no charge.