Generally at this concentration you would need to have your teeth in contact with the 3% hydrogen peroxide for about 5 hours a day for about 2-3 weeks to have meaningful tooth whitening, which is very difficult to do with a watery liquid.
Hydrogen peroxide is an inexpensive household product you probably have on hand right now. When used carefully, it can be an effective way to whiten your teeth. But if used incorrectly — in concentrations that are too high or if used too often — it can cause serious and sometimes expensive tooth damage.
How to do it. To make a peroxide mouthwash, add 2 ounces (oz) of 3% hydrogen peroxide and 2 oz of water to a small cup. Swish this mixture in the mouth daily for 2–4 minutes before spitting it out.
The quickest, most dramatic way to whiten is to get an in-office bleaching at a dentist's office. Using professional-strength hydrogen peroxide and special lights or lasers, your dentist can remove even deep stains in about an hour. It'll cost you, though—probably between $500 and $1,200.
Make sure it's not too gritty! If so, add a little more hydrogen peroxide. Brush with this paste and thoroughly rinse! Use this paste in moderation; no more than 2-3 times a week.
If correctly used, hydrogen peroxide is safe for most people. However, it can be harmful to your teeth if you use it too often or make the concentration too strong. It is important to know that you should not use food-grade hydrogen peroxide to gargle since it contains more than 35% concentration.
Rinse your mouth with two teaspoons of the hydrogen peroxide rinse for one minute, and then spit it out. You may use it up to four times daily following brushing. Just like using peroxide for a scrape on your skin, this hydrogen peroxide mouth rinse helps the inside of your mouth heal.
What Can Be Done to Whiten Yellow Teeth? If you're looking for a radical change in the coloring of your teeth, you need professional-grade whitening to get the job done. Your cosmetic dentist can provide treatment that penetrates deep into the enamel and removes years of stains with a powerful bleaching agent.
You can whiten your teeth with hydrogen peroxide which benefits your smile in two ways: gargle the peroxide in your mouth or mix it with baking soda, apply the mix to your teeth, and rinse off.
Although hydrogen peroxide can be beneficial for certain situations, you should only use it a few times a month. Rinsing with undiluted hydrogen peroxide can burn your organs and cause internal bleeding.
Typically when dentists whiten the teeth with hydrogen peroxide, we use a concentration around 35%. Also, if hydrogen peroxide contacts the the gums, tongue, or roof of the mouth, it will burn them and bleach them white.
This is due to the higher concentration of hydrogen peroxide. When the bleaching trays lie on the edges of the gum, some patients' gums turn white in a few seconds and cause sensitivity.
If your teeth and gums aren't in the best shape or if you've had a lot of previous dental work, both issues can affect your results with traditional teeth whitening treatments. You won't be able to whiten either porcelain crowns or most commonly used dental bonding materials.
Porcelain Veneers
These are very popular amongst celebrities because of their incredible results. Veneers are thin, strong shells that are custom-made from dental porcelain to cover the front surface of your teeth. They can fix small cracks, chips, gaps, and discoloration all at once.
Teeth Are Often Stained
Coffee, cola, berries, tomato sauce and wine all can stain teeth. Even tetracycline antibiotics and fluoride can cause stains at times. Even if you brush every day, your teeth will likely become stained over time if you regularly consume items that cause stains.
Consuming Certain Foods and Drinks. “Certain foods that are high in tannins, such as red wine, are potential causes of yellow teeth,” notes Crest. Other teeth-staining foods include coffee, citrus fruits and juices, soft drinks, teas, berries, tomato-based sauces, curry, balsamic vinegar, and soy sauce.
For about two to six weeks, you can use dentist-recommended whitening toothpaste and brush twice a day. You can use a certified whitening mouthwash which usually takes about three months to produce visible results. Whitening strips are the most compelling in-house treatments that last up to six months.
If you're keen to transform a yellow smile to brilliantly pearly white fast, your best option is to see your dental professional for an in-office whitening treatment. Your dental professional will use a whitener with a strong concentration of hydrogen peroxide or carbamide peroxide.
Swallowing hydrogen peroxide can irritate the tissues in your throat; swallowing undiluted hydrogen peroxide can even burn the organs of your digestive tract and cause bleeding there. Swallowing even a small amount can cause stomach pain and possible vomiting.
Use up to 4 times daily or as directed by your dentist or doctor. Use this product regularly in order to get the most benefit from it. To help you remember, use it at the same time(s) each day.
Kasarsky says to follow the “one third, one third and one third” rule when diluting. That means that the mixture you use should include equal parts of hydrogen peroxide, water and Listerine. If you feel unsure of your mixing ability, you can use a product called Peroxyl that contains a safe amount of hydrogen peroxide.
The fact that dental professionals choose peroxide over saltwater should tell you one thing: saltwater gargles are fine in a pinch, but hydrogen peroxide rinses are actually preferable. Peroxide rinses mix water with 3% hydrogen peroxide to help clean, brighten, and prevent gum damage.