Mouth guards are an important piece of equipment in football, soccer, basketball, and many contact sports.[1] Custom-fitting the rubber against your teeth makes the experience of wearing one much safer and more comfortable. The whole process doesn't take more than a few seconds. See Step 1 for more information.

Steps

  1. 1
    Gather the necessary materials. To properly fit your mouthguard, you'll need:
    • your mouthguard
    • scissors
    • enough boiling water to submerge the mouthguard in
    • a bowl of ice water
    • a towel
  2. 2
    Trim the mouthguard for length. You may need to trim the ends to make sure your mouthguard fits comfortably and doesn't irritate the back of your mouth. Put it in before you fit it and trim a bit off the ends if necessary. If it pokes into your mouth at the back of your jaw, or causes you to gag, trim off a little using scissors.[2]
    • A mouthguard is mostly used to protect your vulnerable front teeth, not your molars, so you've got some wiggle-room as far as the back of the mouthguard goes. Some athletes prefer a more comfortable and short guard that covers the teeth as far as the first molars. Do what's comfortable.
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  3. 3
    Submerge the mouthguard in boiling water. You need enough boiling water to submerge the mouthguard in it for between 30 and 60 seconds. Start a small pot of boiling water on the stove, or boil some in the microwave.[3]
    • Holding the mouthguard carefully by the end strap, submerge it in the water and let it soften. If your mouthguard doesn't have a strap, or you already cut it off, you can just drop it in the water and retrieve it with a slotted spoon.
    • If you have braces, or other dental prosthetics, boil the water for only around 30 seconds. You want the mouthguard to fit your mouth, but not to fill in the crannies around your braces, which can damage them.
  4. 4
    Remove the mouthguard carefully. Quickly blot the mouthguard on the towel and get it into your mouth, adjusting it against your upper teeth. It won't be uncomfortably hot.
    • Using your thumbs, push the mouth guard up and back against your molars. Bite down firmly to get the impression of your teeth on the bottom of the mouthguard and suck the guard against your top teeth.[4]
    • Place your tongue against the roof of the mouth to create pressure and achieve a tight fit around your teeth. This shouldn't take more than 15 or 20 seconds.
    • Don't chew the mouthguard or move it around in your mouth while you're fitting it.
  5. 5
    Place the mouthguard in the ice water. Remove the mouthguard and dunk it in the ice water. Let it cool for a minute or two and try the fit. It should fit snugly against your top teeth without having to hold it with your tongue, and it should fit naturally into your bottom teeth.
    • If you want to cut off the strap, you can do so now, or remove the removable strap.
    • If it feels uncomfortable or ill-fitting, try it again until you get a proper fit.
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Community Q&A

  • Question
    Do I have to use a new mouth guard, or can I use one I haven't used in a while if I fit it with the steps in the article?
    Community Answer
    Community Answer
    You should get a new one. An old one will not mould well to your teeth as it will likely be dry and cracked.
  • Question
    What happens if I chew the mouth guard? Do I need to get a new one?
    Community Answer
    Community Answer
    If you chew the mouth guard, it will become unable to fit your teeth, and you will most likely need a new one.
  • Question
    Should the mouth guard stick to my top teeth?
    Community Answer
    Community Answer
    Yes it should. If this is the first time you've worn the guard, then stick it up you upper or top teeth and suck on it and keep biting and sucking on the mouth guard for at least 5 minutes. Then, take it out and immediately apply cold water for 10 minutes and stick it to your teeth again. It should be comfortable.
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Warnings

  • Do not boil the mouthguard for too long. It might lump together when you pull it out of the water and your guard will be ruined.
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  • Blot the mouthguard first before putting it in your mouth to avoid burning your tongue on the water.
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About This Article

Tested by:
wikiHow Video Team
wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 14 people, some anonymous, worked to edit and improve it over time. This article has been viewed 544,220 times.
45 votes - 71%
Co-authors: 14
Updated: September 16, 2021
Views: 544,220
Categories: Football | Soccer

Medical Disclaimer

The content of this article is not intended to be a substitute for professional medical advice, examination, diagnosis, or treatment. You should always contact your doctor or other qualified healthcare professional before starting, changing, or stopping any kind of health treatment.

Article SummaryX

To fit a mouth guard, start by putting it in your mouth and trimming any excess material off of the ends of the guard. Then, submerge the guard in boiling water for 30-60 seconds to soften the plastic. Remove the guard carefully from the water with a slotted spoon, and then put it in your mouth. Use your thumbs to push the guard against your back molars, and bite down firmly for 15-20 seconds to get a good fit. Remove the guard from your mouth and place it in a bowl of cold water for 1-2 minutes to solidify the plastic. If you want to learn how to position the guard in your mouth with your tongue, keep reading!

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