A bright smile can say a lot about a person, but keeping teeth white is harder than most people expect. Discolouration is one of the most common cosmetic concerns patients bring up – and it is also one of the most misunderstood.
If you have been looking into teeth whitening in NE Calgary, chances are you have noticed a change in the colour of your teeth and want to understand what caused it and what can actually be done. This guide covers both.
Why Do Teeth Change Colour?
Teeth do not stay white on their own. Over time, a wide range of factors – some within your control and some not – affect the colour of your enamel and the layer beneath it called dentine.
Understanding the cause of discolouration matters because not all staining responds to whitening in the same way. Treatment that works well for surface stains may have no effect on discolouration that comes from within the tooth.
Types of Tooth Discolouration
There are two main categories of tooth discolouration, and knowing the difference helps set realistic expectations.
Extrinsic Discoloration
Extrinsic staining affects the outer surface of the tooth. It is caused by things that come into contact with the enamel regularly and leave pigment behind.
Common causes include:
- Coffee and tea – two of the biggest culprits due to their dark pigments and acidity
- Red wine – contains tannins and chromogens that bind to enamel
- Tobacco – both smoking and chewing tobacco causes deep, persistent yellowing
- Certain foods – berries, tomato sauce, soy sauce, and other richly coloured foods
- Poor oral hygiene – plaque buildup causes teeth to appear yellow or dull over time
Extrinsic staining is the type most responsive to professional whitening treatments. The bleaching agents in whitening products break down the pigment molecules on the tooth surface, lifting the colour.
Intrinsic Discoloration
Intrinsic staining occurs inside the tooth, within the dentine or deeper structure. It is more difficult to treat and does not always respond to standard whitening.
Causes of intrinsic discolouration include:
- Tetracycline antibiotics taken during childhood – these can cause grey or brown banding within the tooth
- Excessive fluoride exposure during tooth development – known as fluorosis- can cause white spots or brown patches
- Trauma to a tooth – a knocked or damaged tooth can darken over time as the inner tissue breaks down
- Ageing – as enamel wears thin, the darker dentine beneath shows through more clearly
- Certain medical conditions or medications that affect tooth development
A dental clinic in NE Calgary will assess whether your discolouration is extrinsic, intrinsic, or a combination before recommending a whitening approach.
How Professional Teeth Whitening Works
Professional whitening uses a peroxide-based bleaching agent applied to the teeth by a dental professional. The concentration used in a dental office is significantly higher than anything available over the counter, which is why the results are more noticeable and more consistent.
When patients search for teeth whitening near you, they typically find two main options: in-office whitening and take-home whitening trays provided by a dentist.
In-Office Whitening
This is done entirely at the dental clinic in a single appointment. A high-concentration bleaching gel is applied directly to the teeth. Some clinics use a light or laser to activate the gel and accelerate the process. The appointment typically takes between 60 and 90 minutes, and results are visible immediately.
It is the fastest option and produces the most dramatic change in a single session.
Take-Home Whitening Trays
Custom trays are made from impressions of your teeth, ensuring the whitening gel stays in contact with the tooth surface evenly. You wear the trays for a set amount of time each day – usually between 30 minutes and a few hours – over the course of one to two weeks.
The results are comparable to in-office whitening, though achieved more gradually. Many patients prefer this option for the convenience and flexibility of whitening at home.
Which Is Better?
Neither is universally better – it depends on your lifestyle, the degree of staining, and how quickly you want results. A dental clinic near you can help you decide which approach suits your situation after a proper assessment.
What Whitening Cannot Fix?
It is important to be clear about the limitations of teeth whitening because understanding them helps avoid disappointment.
Whitening does not work on:
- Dental crowns, veneers, or fillings – these restorations do not respond to bleaching agents
- Severe intrinsic staining from antibiotics or fluorosis
- Grey-toned discolouration, which often responds poorly compared to yellow staining
- Discolouration caused by decay or other active dental problems – these need to be treated first
If your discolouration falls into one of these categories, your dentist may recommend alternative cosmetic options such as veneers or bonding to achieve the result you are looking for.
Maintaining Your Results
Remember that whitening is not a permanent fix. The duration that the results last depends on diet, habits, and lifestyle, as well as your daily oral hygiene routine. If taken reasonable care of, teeth whitening can last anywhere from six months to two years.
Here are a few easy things you can do to ensure the longevity of your results:
- Rinse your mouth with water after consuming staining foods and drinks
- Use a whitening toothpaste for day-to-day maintenance
- Brush twice a day and floss daily
- Attend regular professional cleanings at a teeth whitening in NE Calgary provider to remove surface buildup before it sets in
- Limit coffee, tea, red wine, and tobacco where possible
Touch-up treatments – either in-office or with take-home trays – can extend and refresh your results over time.
Is Teeth Whitening Right for Everyone?
Most adults, if they have healthy teeth and gums, can get teeth whitening, but it is not for everyone, such as
- Not suitable for children under 16 or pregnant/breastfeeding patients.
- People with active gum disease or untreated decay – these need to be resolved first
- Patients with significant tooth sensitivity – though desensitising options are available
Before you begin, a conversation with your dentist is the most appropriate first action. Your dentist will examine the condition of your teeth, determine why they have discoloured, and advise on the best way forward.
A Brighter Smile Is Within Reach – Visit Dr Brent MacDonald Dentistry
Tooth discolouration is common, but it does not have to be permanent. Whether your staining comes from years of coffee and tea or from something deeper, there are options available that can make a real difference.
At Dr Brent MacDonald Dentistry, the team takes a personalised approach to every cosmetic concern – including teeth whitening. Book your consultation today and take the first step toward a smile that looks as healthy as it feels.
Frequently Asked Questions
How white will my teeth become with professional whitening?
The results of professional teeth whitening depend on your starting tooth shade and the reasons for the staining. Most people can achieve several shades of improvement with the treatment. Ask your dentist, and they will tell you a reasonable and realistic goal for what your teeth can achieve.
Does professional teeth whitening cause permanent tooth sensitivity?
No, a few people may notice sensitivity during or after whitening, but it should only last for a few days and can be controlled with a desensitising toothpaste both before and after the treatment.
How often can I whiten my teeth?
This is dependent on the type of method and the advice from your dentist. Repeated whitening too often will result in sensitive teeth with regard to enamel sensitivity. Dentists generally recommend touch-ups of between 6 and 12 months, rather than a series of full treatments.
Can I whiten my teeth if I have crowns or veneers?
Whitening agents do not change the colour of crowns, veneers, or fillings. If you whiten your natural teeth, there may be a mismatch in colour. Speak with your dentist before whitening so you can plan accordingly.
