Should you use crest white strips before or after brushing

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• Whitening Strips Application
|
• Cautionary Tips
|
• Regular Dental Care

As we age, our teeth may not look as white and vibrant as they once did. Teeth can yellow for a number of reasons, ranging from a lack of dental hygiene to drinking certain beverages that can stain the teeth, such as wine or tea. Smoking can stain teeth as well. Although they may not be as effective as a professional treatment, board-certified dentist Tu Anh Vu believes "that whitening strips can help undo some of this yellowing." Before you use whitening strips, it is a good idea to learn more about how to properly use them and get the most from them.

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   1

   Read the instructions carefully. Although most whitening strips are applied and used in a similar manner, some brands may have different instructions. Always read the instructions fully and be aware of any side effects before using any whitening strip or whitening product.

   • Misuse can cause damage to your teeth, gums, and health.[1]
   • Instructions can vary between brands, always fully read the instructions before use.

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   Brush your teeth. Before you apply your whitening strips, you will need to brush your teeth. If you apply them without brushing your teeth, you may inadvertently trap food or bacteria under the strip and the surface of your teeth will not be in contact with the whitening substance, which can lead to an unappealing-looking result. Brushing your teeth can also help remove any plaque that may block the whitening effects of the strip on the enamel.[2] Board-certified dentist Tu Anh Vu adds that "brushing your teeth will allow the hydrogen peroxide in the whitener to penetrate your enamel better."

   • Brush your teeth at least a half-hour before you apply the strips to let saliva clean away any excess fluoride and get the enamel ready for whitening.

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   Prepare your strips. Before you apply the strips to your teeth, take a moment to make sure you are applying the right strip to the correct location. Some whitening strips will have special strips for top and bottom teeth and all will have a certain side of the strip that must contact the teeth. Take a moment and learn which strip goes where.

   • Apply the side with any gel to your teeth. This gel is the whitening agent and must contact the entire surface of your teeth except the gums to work properly.
   • The smooth side of the strip will have no whitening gel and is there only to help you apply the strip.

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   Apply the strips to your teeth. Having determined which way your strips need to be applied, place them over your teeth, with the gel coated side making contact with the surface of your teeth. Make sure the strip covers your teeth entirely, working out any bumps or uneven areas.

   • Try drying the surface of your teeth with a napkin or towel before applying the strips. This will help increase the whitening effect. You can also use a cheek retractor to spread your lips and control the flow of saliva during the whitening treatment. Less moisture in your mouth will give you a better result.
   • A tooth brush can be used to smooth the strip out if needed.
   • Completely covering your teeth without any irregular areas will help evenly whiten your teeth.
   • Avoid allowing the strips to reach up and cover your gums, as this can cause irritation or even slight burns that will make your gums look white.

5. 

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   Wait for the strips to finish working. Once you have applied the strips you will need to patiently wait as they work on your teeth. Most brands will have a slightly different amount of time they recommend you wear the strips, so carefully read your instructions. Avoid touching the strips to allow them to work uninterpreted.[3]

   • In general, you will wait for around 30 minutes, before removing the strips.
   • In order to keep your teeth dry during the whitening procedure you can try lying in bed on our back, keeping your mouth a little bit open. This will reduce the quantity of saliva, which may interfere in the whitening process. Try breathing through your mouth for a while as well to help dry out your mouth.

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   Take the strips off. After the amount of time that your specific strips have instructed you to wear them has passed, you will need to remove the strips. Peel them away from your teeth and throw them away when it is time to remove them. For best results, board-certified dentist Tu Anh Vu advises "not eating anything for an hour after your treatment."

   • Don't leave them on longer than specified as this can cause irritation and sensitivity in the teeth and gums.
   • Leaving the strips on for a longer amount of time won't increase the whitening results.
   • Clean your mouth after using the strips. Try rinsing with water or brushing your teeth to ensure that all the whitening gel is out of your mouth. Try not to swallow too much of the gel as it can be toxic.

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   Repeat the process. Whitening strips work over time, utilizing slow exposure to the chemicals responsible for the whitening process. You will need repeated use of the strips before you see any noticeable difference in how white your teeth are. Keep using the strips for the recommended amount of time to get the most out of them.[4] Board-certified dentist Tu Anh Vu suggests "using the strips monthly as a refresher once you get the shade you desire."

   • Use twice daily for 30 minutes at a time.
   • Sustained results can be expected at around four months, but they also work well after a professional teeth whitening in a dental office.

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1. 

   1

   Don't swallow any gel from the strips. Some whitening strips contain hydrogen peroxide, which is poisonous if swallowed. Try to avoid swallowing any of the gel or saliva that is produced when wearing the whitening strips.[5]

   • Don't worry if you accidentally swallow a small amount of gel. Small amounts will likely not produce any symptoms.

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   Stop if sensitivity occurs. The chemicals in whitening strips can cause some sensitivity in the teeth and gums to occur. This may be the result of the gel coming into contact with the gums directly, applying the strips for too long or too much, or a sensitivity to the gel.[6]

   • Take a break from whitening strips if you notice your teeth or gums becoming sensitive.[7]
   • Ask your dentist if you are able to use whitening strips safely.

3. 

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   Ask your dentist before using any whitening product. Not all tooth whitening strips use the same chemicals and processes to achieve results. Some may actually exacerbate preexisting dental issues or cause new ones to arise. Ask your dentist if whitening strips and other whitening products are a good fit for you.

   EXPERT TIP

   Dr. Tu Anh Vu is a board certified dentist who runs her private practice, Tu's Dental, in Brooklyn, New York. Dr. Vu helps adults and kids of all ages get over their anxiety with dental phobia. Dr. Vu has conducted research related to finding the cure for Kaposi Sarcoma cancer and has presented her research at the Hinman Meeting in Memphis. She received her undergraduate degree from Bryn Mawr College and a DMD from the University of Pennsylvania School of Dental Medicine.

   

   Tu Anh Vu, DMD
   Board Certified Dentist

   Expert Warning: Do not use whitening strips if you have braces, dentures, or restorative work such as fillings, veneers, or crowns.

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1. 

   1

   Brush your teeth regularly. Keeping up with regular brushing of your teeth is a great way to help keep them white and healthy. Make sure you are brushing your teeth properly and often enough to get the full benefit. Remember to take your time when brushing and reach every tooth completely.[8]

   • Brush twice daily, for around two minutes each time.[9]
   • Don't brush too hard as this can remove enamel or damage the gums. Also try to avoid using a toothbrush that is too hard (always use soft) and do not use a new toothbrush immediately after the treatment or after drinking a soda as the enamel is weakened and very sensitive to abrasion.
   • You can try using whitening toothpaste in addition to your whitening strips but make sure you are also using toothpaste with over 1100 ppm of fluoride, which may help with any sensitivity. Try using strips and whitening toothpaste for two weeks to start, but alternate the whitening toothpaste with the fluoride toothpaste (best used before bed).[10]

2. 

   2

   Use mouthwash. Using mouthwash in addition to regular brushing and flossing can help improve the health of your mouth and teeth. Mouthwash is used to kill bacteria as well as wash away any loose debris knocked loose by brushing or flossing.[11]

   • Try to swish your mouthwash for at least 30 seconds before spitting it out.
   • If the mouthwash is too strong, you can water it down, or dilute it with water from the start using a 50:50 dilution.
   • You may want to use whitening mouthwashes in addition to your whitening strips.

3. 

   3

   Floss daily. Although flossing can be difficult and takes time, it is an important step in maintaining the health of your teeth and gums. Flossing works by removing built up plaque and tartar that brushing might have missed. Keep in mind that it is better to prevent any future problems than spend loads of money to repair the damage.[12]

   • Start with a long piece of floss, about arms length.
   • Wrap the floss around your middle fingers, spanning the gap between your hands.
   • Work the floss down in between teeth on both sides of each gum papilla (the gum triangle which is located between teeth).
   • Pull the floss to one side of the tooth, forming a "c" shape.
   • Move the floss up and down the length of the tooth to clean it.

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   Avoid certain foods. Some foods can cause your teeth to become stained, resulting in a yellowish coloration, which is more likely to produce results much faster than normal if you are using strips. Other foods can cause your enamel to wear down, which can lead to tooth damage and pain. Try to avoid some of the following foods and drinks as you work to whiten your teeth:[13]

   • Coffee, tea and wine can cause your teeth to become stained.
   • Sugary foods or highly acidic drinks, like orange juice or soda, can wear the enamel away on your teeth. This can cause cavities or other dental issues.[14]

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   Visit with your dentist. Making regular appointments with your dentist is a great way to keep your teeth healthy. Your dentist can help you to catch small dental issues before they become serious, as well as maintain regular care practices.[15]

   • Your dentist may be able to provide whitening services for you and help you to track their progress.

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Add New Question

• Question

  Do whitening strips work after one use?

  

  Dr. Tu Anh Vu is a board certified dentist who runs her private practice, Tu's Dental, in Brooklyn, New York. Dr. Vu helps adults and kids of all ages get over their anxiety with dental phobia. Dr. Vu has conducted research related to finding the cure for Kaposi Sarcoma cancer and has presented her research at the Hinman Meeting in Memphis. She received her undergraduate degree from Bryn Mawr College and a DMD from the University of Pennsylvania School of Dental Medicine.

  

  Board Certified Dentist

  Expert Answer

• Question

  How old do you have to be to use whitening strips?

  

  Dr. Macau is an oral surgeon, periodontist, and aesthetician at Favero Dental Clinic in London. He received his DDS from Carol Davila University of Medicine in 2015.

  

  Doctor of Dental Surgery

  Expert Answer

  Support wikiHow by unlocking this expert answer.

  Strips are recommended to be used after the age of 20 years old when the enamel is strong enough to support a whitening substance. Your diet needs also to contain as few sugary foods or fizzy drinks as possible and coffee or smoking should be drastically lowered if you want a good result.

• Question

  Can I use whitening strips before breakfast?

  

  Dr. Macau is an oral surgeon, periodontist, and aesthetician at Favero Dental Clinic in London. He received his DDS from Carol Davila University of Medicine in 2015.

  

  Doctor of Dental Surgery

  Expert Answer

  Support wikiHow by unlocking this expert answer.

  The best way to use them is either during the day or before bedtime. If you use them before breakfast your teeth may get stained as the enamel has micro porosities after using whitening strips and also sensitivity may occur.

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VideoRead Video Transcript

• Make sure you use the whitening strips for 14 days or the time designated by the manufacturer. Do not use strips longer than described or you can cause damage.

• Ask your dentist before using any whitening product to make sure it is a good fit for you.

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• Don't leave the strips on longer than recommended in your instructions. Usually, 30 minutes is enough time.

• Avoid swallowing toothpaste, mouthwash, and any gel from whitening strips.

• Discontinue use of whitening strips if you notice any sensitivity in your teeth or gums or if you notice discoloration.

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About This Article

Article SummaryX

To use teeth whitening strips, first brush your teeth so they’re clean when you apply the strips. Wait 30 minutes after brushing so your gums aren’t too sensitive. Then, remove the whitening strips from their packaging—there should be one strip for your top teeth and one for your bottom teeth. Peel the strips off of the plastic and line them up with your teeth so the gel side of each strip is facing your teeth. Mold the strips around your teeth with your fingers. Make sure you press them down so they’re completely covering each tooth. Once they’re secure, leave them on for however long is recommended in the instructions. You’ll usually leave them on for around 30 minutes. After the time is up, remove the strips and rinse your mouth. Repeat the process once a day or according to the instructions that came with your whitening strips. It may take several uses before you start to notice results. If you experience sensitivity while using whitening strips, try taking a day or more off from using them. If sensitivity continues, talk to your dentist. For more advice from our Dental reviewer, including how to keep your teeth white after a whitening treatment, read on!

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