Teeth Whitening Revisited - Dental Products & Procedures for Bleaching Your Teeth


  • Why do out teeth stain?
  • How do whitening strips work?
  • Who do whitening strips do?
  • How long should I wear Crest White Strips?
  • The American Academy of Cosmetic Dentistry on Teeth Whitening

Teeth whitening refers to a dental procedure that is used to change the colour of teeth or lighten stains on natural teeth. This process can be done professionally by a dentist, and it may also be used by consumers in the form of over-the-counter products. Teeth whitening is also referred to as teeth bleaching, which is actually a misnomer because it does not bleach the teeth (fortunately); however, particles in the whitening agent absorb into tooth enamel and react with molecules of stains. This reaction reduces colour intensity of the stain by diminishing some colours that give it its overall hue, while leaving other colours like white unchanged.

The term “teeth whitening” is used to describe different processes: 

  • direct application of chemical agents (e.g., hydrogen peroxide or carbamide peroxide) on stained teeth, and
  • removal of discoloration by physical abrasive techniques such as tooth brushing and surface polishing with pastes containing specified levels of abrasion grade silicone carbide powder. The latter technique is not technically considered whitening but an effective cleaning method will aid in reducing extrinsic stains.
  • removal of discoloration by the action of whitening strips impregnated with active bleaching agents such as hydrogen peroxide

Why do our teeth stain?

Well, it’s because of the pigment in the foods we eat and beverages we drink. Fruits, coffee, tea, red wine are just some of the many things that can discolour your pearly whites.

The various forms of teeth whitening may be used alone or together. If the tooth is decayed or weakened to the point where it cannot stand up to bleaching, then some form of surface preparation must be done first. This could involve minimal removal of the enamel to more extensive steps involving drilling away part of the root and filling the alveolar space. It is possible to have this kind of surgery done under local anaesthetic with just sedation if one desires but for larger areas, conscious sedation or general anaesthesia are required because of the duration involved in these procedures. A common way dentists administer this type of treatment is with power assisted bleaching using a curing source which can speed up the bleaching and reduce the exposure time. This makes it possible for one to have cosmetic bleaching done in an office setting, although often this is not covered by dental insurance.


How Do Strips Whiten Teeth?

Many people are facing the issue of discoloration on their teeth by one way or another involving many different reasons that may cause one’s tooth colour to change over time (such as ageing, drinking coffee/tea, smoking, taking certain medications etc.). Teeth whitening is effective in getting rid of this problem for most people; however, it cannot be guaranteed to work in every situation so there are some precautions worth thinking about before deciding on a course of treatment.

There are several types of whitening strips on the market, all with varying levels of effectiveness. White strips generally yield better teeth whitening results than other DIY treatments such as rinses or toothpaste because they adhere directly to the teeth rather than just the surface like other products do. However, it has been noted that some people respond better to certain types of strips over others; even for those who have very sensitive gums Crest White Strips have been found to be popular and effective.

Whitening strips work by using a combination of ingredients which break down stains on the teeth. Essentially the whitening formula loosens stains bonded to enamel and lifts them away from the teeth. The process can be compared to how a poultice works; the ingredients in strips soak through the enamel and attach themselves to stains, drawing them out of pores and lifts dirt and debris away from teeth leaving them whiter and brighter.

Whitening strips work on both natural and artificial tooth colours, depending on which ones you buy. However, it is imperative that you do not use strips more than what they recommend because using them more frequently than suggested causes damage to gums or causes irritation for some users.

There are other ways (besides whitening strips) such as LED light kits or professional treatments which involve bleaching your teeth with hydrogen peroxide, however these methods used to whiten teeth may prove to be time-consuming and expensive. For those who want a quick tooth whitening solution, using whitening strips is perfect.


The Bleaching Process: Whitening Strips

Whitening strips are an easy way to achieve pearly whites in the comfort of your own home without having to go to a professional or pay for expensive treatments. It’s best to use them on clean teeth free from any other treatment such as bleaching agents. If you’re worried about damaging your enamel, don’t be! Crest White Strips are designed specifically for this purpose – to get rid of surface stains while protecting your enamel!

Whitening Strips are designed to be used at home and will provide optimum results if applied correctly. They should only be used once every 24 hours, and you can adjust the frequency of application depending on how quickly your teeth whiten and any sensitivity that you experience. If you have stained teeth which only appear when drinking tea, coffee, red wine etc, these types of stains are specifically removed by whitening strips. If you’re looking for a solution to any types of tooth stains, we recommend reviewing our robust whitening strip product catalogue.

Teeth whitening kits are available in many different types with each offering a new level of convenience. Whitening strips can be applied quickly, and you do not need to make an appointment to use them. They work best on stains caused by food or smoking.. You can purchase these without needing a prescription from the doctor. They come pre-formed and ready for use and there is no mixing required before they can be used. The effect will range between users but some people might find that results take up to two weeks while others may see the results more swiftly – within three days if all instructions are followed properly.

There is no evidence that overuse damages enamel, however we always recommend using them as directed for best results.

Whitening Strips are safe for use on natural teeth, but not recommended for use on damaged or decayed teeth as they may cause sensitivity and discomfort. If you experience severe pain, rinse your mouth out with water and do not continue using the strips.


How long should I wear Crest White Strips?

We recommend wearing your 3D Whitestrips for 30 minutes. Studies show that you get the most amazing, glowing results during this time frame!

Before & After Teeth Whitening - competition time

Your Teeth Whitening Options

Some of your teeth whitening options are as follows:

  • direct application of chemical agents  (professional teeth whitening)
  • removal of discoloration by physical abrasive techniques such as tooth brushing and surface polishing (in-office teeth whitening)
  • removal of discoloration by the action of whitening strips impregnated with active bleaching agents 

In-Office Teeth Whitening Procedures

There are a few different procedures to whiten teeth that can be done in a dentist’s office. The most common is the use of a bleaching agent that is applied to the teeth. This is then activated with a light or laser. There are also other options, like microabrasion and dental veneers. A short list of these procedures is as follows:

  • Light or laser
  • Microabrasion
  • Dental veneers
  • proprietary teeth whitening procedures such as Zoom teeth whitening, Kor teeth whitening, and Boost teeth whitening

Each of these procedures can provide great results, but they do come with some risks. It is important to discuss all of your options with your dentist and make an informed decision about which procedure is right for you.

Light or Laser Teeth Whitening

This is one of the most common teeth whitening treatments. A bleaching agent is applied to the teeth. This is then activated with a light or laser. The light helps to break down the bleaching agent and speed up the whitening process.


Microabrasion is a procedure that uses a fine abrasive to remove the surface layer of enamel from the teeth. This procedure can be used to remove stains and discoloration.

Dental Veneers

Dental veneers are thin pieces of porcelain that are bonded to the front of the teeth. They can be used to correct a variety of dental problems, including stained or discolored teeth, crooked teeth, and chipped teeth.

Zoom Teeth Whitening

In just one hour, you can have your teeth cleaned and glowing bright white with Zoom. The procedure begins by applying a short preparation that covers the lips or gums. Thereafter it’s time for peroxide whitening gel application which works together with light to penetrate deep into stained areas while leaving behind fresh enamel instantly thanks to its Color safe formula. The procedure is painless and requires little preparation time before you can go about your day. Firstly, an applicator covered in peroxide gel will be placed on each tooth for 15 minutes while the dentist applies light from Zoom to break up stains throughout treatment area; this process leaves no room whatsoever for worries or anxious feelings as it’s all done virtually without even being aware of what we’re doing.

Kor Teeth Whitening

Kor whitening is one of the most popular methods used to achieve brighter teeth. The process begins with a consultation in which your dentist will assess your teeth and discuss with you the best way to achieve the desired results. A light activated bleaching gel is then applied to your teeth and left for a set amount of time. The length of time will depend on your tooth’s level of staining. KöR whitening trays are the perfect solution for people who want longer-lasting results. They’re designed with a special seal to stop your saliva and sulcular fluid from mixing with the gel, so you can enjoy up 6 or 10 hours of bright white teeth.

Boost Teeth Whitening

Boost procedure for whitening teeth is a safe, effective and convenient way to get the dentist’s office results you want. With no hot lights needed—just comfortable gel that starts working immediately with an hour of treatment time. The gel contains potassium nitrate; it also has fluoride for your safety. You’ll see noticeable results within an hour of treatment time with these gentle methods.



The American Academy of Cosmetic Dentistry On Teeth Whitening

The American Academy of Cosmetic Dentistry (AACD), just like the American Dental Association, takes the position that oral health is essential to good overall health and recommends yearly checkups and cleanings by a general dentist or a cosmetic dentist. The AACD urges patients to select their dentists wisely and make sure that the dental office employs staff dedicated to protecting patient safety.

The AACD also encourages manufacturers of tooth whitening products to inform consumers and ask questions regarding the safety of products they are considering. This will ensure the highest quality care and reduce health risks for oral and overall health.

AACD offers tips on how to safely achieve a brighter, whiter smile:

  • Do not use over-the-counter teeth-whitening products if you have gum disease. Gum disease can cause your gums to recede, which could lead to exposure of the root surface of your teeth making them appear yellow or brownish.
  • To avoid damage to tooth enamel, do not whiten your teeth if you have crowns, veneers or other restorations. Also, do not use whitening products on teeth that are severely decayed or broken down.
  • Do not swallow the whitening gel when using over-the-counter mouth trays. Rinse your mouth with water after the recommended time to remove excess gel before swallowing. Some people may experience minor stomach upset or bowel irritation if they swallow too much peroxide.
  • If you currently wear braces or have had them in the past year, ask your dentist about ways to make any necessary adjustments for improved comfort and effectiveness of whitening strips. Additionally, wait at least 3 months after having braces before using whitening strips.
  • Do not wear whitening trays overnight or for longer than is recommended by the manufacturer. Overuse could cause your teeth to become overly sensitive to hot and cold liquids, air and foods. You also risk damaging your gums if you wear them too long.
  • Brushing with a gel toothpaste may cause the tray to fill up more quickly, so rinse well after brushing first. Avoid chewing on trays as this could lead to tray damage or breakage and make it uncomfortable to wear later. If you have any questions or concerns about how these products might interact with your teeth/medications/etc., talk with your dentist asap!

Frequently Asked Questions

What is the most effective way of bleaching teeth?

If you mean the most cost effective, we get this question a lot, and the answer is Crest Whitestrips. Crest Whitestrips are one of the most popular methods of teeth whitening because they are easy to use, provide great results, and are very affordable. Plus, there’s a variety of different types of Whitestrips so you can find the perfect set for your needs.

However, if you refer to effectiveness in terms of the level of whitening achieved, there are expensive in-office whitening treatments like Zoom or Kor that can lighten teeth up to eight shades in a single treatment. But, if you’re looking for something more affordable and less invasive, Crest Whitestrips are still your best option.

What are the side effects of bleaching your teeth?

The most common side effect of teeth whitening is tooth sensitivity. This happens when the bleaching agent comes into contact with the enamel and dentin of your teeth, causing them to become temporarily more sensitive to hot and cold temperatures, sweet and sour foods, and even pressure. In most cases, the sensitivity is mild and goes away within a few days after you finish whitening your teeth. However, if it’s severe or lasts for more than a week, you should discontinue use and consult your dentist.

Another potential side effect of teeth whitening is gum irritation. This can happen if the bleaching agent comes into contact with your gums, causing them to become inflamed or irritated. If this occurs, discontinue use and consult your dentist.

Is tooth bleaching harmful?

There is some concern that using bleaching agents to lighten teeth can cause tooth sensitivity and gum irritation. However, these side effects are generally mild and temporary. More serious side effects, such as damage to the enamel or gums, are rare.

Teeth whitening is a safe and effective way to brighten your smile. If you experience any side effects, however, discontinue use and consult your dentist.

Can yellow teeth become white?

Yes, yellow teeth can become white by using a tooth whitening product. Whitening products work by breaking down the staining molecules on the tooth surface. This exposes the natural white enamel underneath.

There are many different tooth whitening products available, including whitening strips, gels, and pastes. Talk to your dentist to find out which product is best for you.

How can I permanently whiten my teeth?

There is no way to permanently whiten your teeth, strictly speaking because teeth whitening products only work to lighten the color of teeth temporarily. Your teeth will stain based on your diet and lifestyle habits, so it is important to maintain good oral hygiene practices and use a tooth whitening product on a regular basis to keep your teeth looking their best. However, by using a tooth whitening product on a regular basis, you can maintain the results of your treatment and keep your teeth looking their brightest.

One way to have long-lasting teeth whitening is by using laser whitening treatment. This procedure uses a laser to break down the staining molecules on the tooth surface. It is one of the most effective methods of tooth whitening.

Another way to get long-lasting treatment is by undergoing dental bleaching. This is a process in which your dentist will apply a bleaching agent to your teeth and then shine a light on them. This will help the agent to work more effectively.

Crest Whitestrips also boast long-lasting professional-level teeth whitening. All you need to do is follow the directions on the package and you will see a significant difference in your teeth’s whiteness.

Why won’t my teeth whiten?

There are a few reasons why your teeth might not whiten as much as you’d like them to. First, where teeth discoloration is due to ageing, there is a limit to how much they can be lightened. Second, teeth whitening is not effective on dental restorations such as crowns and veneers.

Third, if your tooth enamel is thinning, the bleaching agent will reach the dentin layer of your teeth, which is darker than the enamel. In this case, your dentist might recommend a different type of whitening treatment or a dental veneer.

Fourth, some people’s teeth are just naturally darker than others. This is something that cannot be changed with whitening treatments. Finally, if you have had dental work done in the past (such as dental veneers), the whiteness of your teeth may be affected.

Can 70 year old teeth be whitened?

Teeth discolouration due to ageing is a common problem, and one that can be treated with Crest Whitestrips. The amount of whitening that you will achieve will depend on how discoloured your teeth are to start with, but most people will see some improvement.

Remember that teeth whitening is not permanent, so you may need to repeat the treatment every few months to maintain the results. You should also avoid foods and drinks that stain teeth, such as coffee and red wine.

Can I use peroxide to whiten my teeth?

No – applying peroxide directly to the teeth can actually damage your teeth and gums if used incorrectly. Crest Whitestrips use a safe and effective hydrogen peroxide formula that will give you the best results.


  1. Tooth Whitening at Home, https://www.consumerreports.org/beauty-personal-care/tooth-whitening-at-home/
  2. Clifton M. Carey, Tooth Whitening: What We Now Know, Journal of Evidence Based Dental Practice, Volume 14, Supplement, 2014,
    Pages 70-76, ISSN 1532-3382.
  3. Qianqian Pan, Stephen Westland, Tooth color and whitening – digital technologies, Journal of Dentistry, Volume 74, Supplement 1,
    2018, Pages S42-S46, ISSN 0300-5712.