Sports Mouthguard or Night Guard: Which Job Does It Do?

Tell the dentist when you intend to wear a guard and what you want it to protect against.

Compare their purpose

Question	Sports mouthguard	Night guard
What is it for?	Protection against injury during sports	Protection of teeth from grinding
When is it worn?	During the relevant activity	As directed for grinding, often during sleep
What should you check?	Fit, retention, comfort and breathing	Fit and whether it protects the teeth comfortably

Sports guards include custom-made and store-bought options, with differences in fit and retention. A dentist can make a night guard fitted to your mouth; an over-the-counter option may not provide the same fit or protection.¹²

Bring the guard and the question

For sports, describe the activity and any problem keeping a guard in place. Properly fitted mouth protection can reduce dental injuries. It has not been established as a way to prevent concussion.¹

For grinding, report chipped teeth, jaw soreness or other concerns to the dentist. A night guard protects against tooth damage; it does not by itself cure grinding. A sports guard has a different design and may be uncomfortable to sleep in.²

Ask the dentist to check an existing guard before you use it for another purpose. Request instructions for wear, cleaning, storage and when the fit needs another review.

Is It My Breath? lists a two-minute routine card and a visit script in its toolkit. It adds broader mouth-care planning alongside the dental advice about your guard. See the book.