Teeth Whitening: Causes Of Tooth Discolouration And The Best Treatment Options
A brighter, whiter smile is a common goal for many patients, and teeth whitening remains one of the most popular cosmetic dental treatments available. It’s normal for teeth to lose their sparkle over time. Understanding why tooth discolouration occurs is an important first step in choosing a whitening method that actually works.
What Causes Stained Teeth Or Tooth Discolouration?
Tooth discolouration and stained teeth are common concerns that can make your smile appear dull or yellow, and unfortunately, can be difficult to avoid. While many stains develop from everyday habits like diet and drinking coffee or tea, others may be caused by ageing, medication, or changes within the tooth itself. A thorough dental assessment can help identify the cause and determine the most appropriate treatment, and regular dental visits can help prevent and manage staining to
keep your smile brighter for longer.
Let’s break down the types of staining…
Extrinsic Stains: Surface-Level Stains
Extrinsic stains affect the outermost layer of the tooth (enamel). This can be caused by:
- Foods and drinks with strong pigments, such as coffee, tea, red wine, soft drinks, and berries
- Smoking or chewing tobacco
- Poor oral hygiene, leading to plaque and tartar buildup
The good news? Extrinsic stains typically respond well to professional whitening. With our in-chair Zoom whitening, surface pigments can be broken down quickly and effectively, revealing a brighter smile in just a single appointment.
Intrinsic Stains: Beneath The Surface
Intrinsic stains occur within the tooth structure itself, affecting the layer beneath the enamel.
Common causes include:
- Inconsistent brushing and flossing
- Diets with high levels of sugar and acidity
- Dental trauma
- Certain medications
- Excessive fluoride exposure during childhood
Intrinsic stains are generally more difficult to treat with teeth whitening alone. While whitening may provide subtle, gradual improvement in some cases, cosmetic treatments such as veneers or composite bonding are often more effective for achieving a noticeable and lasting result.
Am I A Good Candidate For Teeth Whitening?
Suitability for teeth whitening depends on several important factors that should be considered
before treatment begins:
- Your dentist will assess your oral health to ensure it is stable, with no active gum disease or untreated cavities.
- Severe discolouration or intrinsic staining may be more effectively treated with cosmetic options such as veneers or composite bonding.
- Professional teeth whitening will not change the colour of dental fillings, crowns, or other restorations. Teeth with a high number of existing restorations may therefore be better suited to treatments such as veneers or composite bonding to achieve a more uniform appearance.
- In general, yellow or yellowish-brown teeth respond more effectively to whitening than grey or bluish-grey teeth. Multi-coloured discolouration is often more resistant and may require additional cosmetic treatment options to achieve the desired result.
- A suitable candidate will have realistic expectations about the outcome, as results vary depending on the type and cause of staining.
In-Chair Teeth Whitening vs Take-Home Whitening Kit
At Keys Dental, we offer both in-chair Zoom teeth whitening and take-home whitening treatments to help patients achieve a brighter, more confident smile. While both can effectively brighten your smile, they differ in terms of treatment time, convenience, and the speed of results.
In-Chair Teeth Whitening
Speed of results: You’ll see noticeable results in just one session. Great for last-minute events or immediate transformations
Strength of whitening: High
Cost: $599 at Keys Dental
Convenience and comfort: Done in one session, but requires you to visit the clinic and sit in the chair for about 90-120 minutes
Sensitivity: Some patients may experience temporary tooth sensitivity after treatment due to the stronger bleaching agents
Take-Home Whitening Kit
Speed of results: Results appear gradually over several days or weeks, depending on how consistently you use the kit
Strength of whitening: Moderate
Cost: $350 at Keys Dental
Convenience and comfort: Offers flexibility – you can whiten your teeth while watching TV or relaxing at home
Sensitivity: Usually causes less sensitivity, but may require more time to achieve the same result
Why a Professional Teeth Whitening Assessment Matters
While teeth whitening can be an effective way to brighten your smile, the best results begin with a professional assessment. Not all types of discolouration respond to whitening in the same way, and some may require alternative cosmetic treatments. During your assessment, your dental professional will:
- Identify the exact type of staining you have
- Recommend the safest, most effective whitening method for your needs
- Ensure your teeth and gums are healthy enough for whitening
- Offer aftercare guidance to extend your results
- Factor in your long-term smile goals and create a customised treatment plan to help you achieve them
How to Maintain Your Teeth Whitening Results
No whitening treatment is permanent. Fortunately, there are several steps you can take to help maintain your results and keep your smile looking brighter for longer:
- Maintain good oral hygiene by brushing twice daily, flossing regularly, and attending routine dental check-ups and cleans
- Limit stain-causing foods and drinks such as coffee, tea, red wine, cola, and curry where possible
- Rinse your mouth with water after consuming highly pigmented foods and beverages to help reduce staining
- Avoid smoking and tobacco products, which are among the most common causes of tooth discolouration
- Consider using a straw for cold drinks such as iced coffee or soft drinks to minimise contact with your teeth
- Schedule regular dental cleans to remove surface stains before they become more noticeable
- Use whitening touch-up treatments when recommended, particularly if you have custom whitening trays that can be reused at home
The Bottom Line
Tooth discolouration can occur for a variety of reasons, and understanding the underlying cause is often the key to choosing the most effective treatment. A professional assessment not only helps protect your oral health but also ensures your whitening treatment is tailored to your individual needs and expectations.
If you’re considering teeth whitening, book a consultation with Keys Dental. We’ll assess your smile, discuss your goals, and recommend the treatment option best suited to your needs, helping you achieve a brighter, more confident smile.
