Tooth colour varies naturally, and some change is expected over time. Tea, coffee, red wine, smoking, plaque and calculus can contribute to staining on the outside surfaces of teeth. Ageing, medications, dental trauma and previous dental treatment can also affect colour from within the tooth.
It may not be possible to keep teeth completely free from staining, but sensible daily habits can reduce surface deposits and help maintain oral health.
Here are five practical measures to consider.
-
Brush twice daily and clean between your teeth
Brush your teeth twice a day using fluoride toothpaste and a soft-bristled toothbrush. Clean gently but thoroughly along the gumline and across every tooth surface.
Plaque is a sticky layer of bacteria that can collect pigments from food, drinks and tobacco. If it is not removed, it can harden into calculus, which cannot be brushed away at home.
Clean between your teeth once a day using:
- Dental floss
- Interdental brushes
- A water flosser
- Another aid recommended by your dental professional
Cleaning between the teeth helps remove plaque and food from areas a toothbrush cannot reach.
Brushing harder or more frequently does not necessarily remove deeper stains. Excessive pressure and highly abrasive products may contribute to tooth wear or sensitivity.
-
Be aware of common sources of surface staining
Food and drinks associated with external staining include:
- Coffee
- Black and green tea
- Red wine
- Cola and other dark soft drinks
- Strongly coloured sauces
- Some curries and spices
- Dark berries
This does not mean these foods must always be avoided. Frequency, oral hygiene, enamel condition and individual habits all influence staining.
To reduce prolonged contact:
- Drink water after consuming staining food or drinks
- Avoid sipping coloured or acidic drinks continuously throughout the day
- Have drinks with a meal rather than repeatedly between meals
- Follow your usual oral-hygiene routine
- Use a straw for selected cold drinks if practical, while remembering that it does not prevent all contact with the teeth
The saying “if it stains a white shirt, it will stain your teeth” is an oversimplification. Different foods interact with enamel, plaque and dental restorations in different ways.
-
Rinse after acidic food and drinks—and delay brushing
Many drinks associated with staining are also acidic. Examples include wine, soft drinks, energy drinks, sports drinks and some fruit juices.
Acid can temporarily soften the outer surface of tooth enamel. Brushing immediately afterwards may contribute to enamel wear.
After consuming something acidic:
- Rinse your mouth with water
- Drink plain water or milk
- Avoid swishing the acidic drink around your mouth
- Wait approximately 60 minutes before brushing
- Choose fluoridated tap water as your usual drink
Sugar-free drinks can still be acidic. The absence of sugar does not necessarily mean a drink is harmless to enamel.
If you experience frequent reflux or vomiting, tell your dentist and medical practitioner. Repeated exposure to stomach acid can cause irreversible tooth erosion and may require medical investigation.
-
Avoid smoking and tobacco products
Smoking can cause persistent yellow or brown surface staining. It also increases the risk of gum disease, delayed healing and oral cancer.
Professional cleaning may remove some tobacco-related surface deposits, but staining can return if smoking continues. Whitening does not address the other health effects of tobacco use.
If you would like to stop smoking, your dentist, pharmacist or medical practitioner can discuss available support.
Vaping should not be treated as a harmless alternative for oral health. Tell your dental practitioner if you smoke or vape so this can be considered during your oral-health assessment.
-
Have stains assessed before whitening
Not every colour change is an external stain, and whitening is not always the appropriate first treatment.
A dental assessment can help identify whether the appearance is caused by:
- Surface staining
- Plaque or calculus
- Tooth decay
- A leaking or discoloured filling
- Enamel wear
- Dental trauma
- A problem with the dental pulp
- Previous root canal treatment
- Medication or developmental changes
- Gum recession exposing a darker root surface
A professional clean may remove plaque, calculus and selected surface stains. It does not bleach the internal colour of the teeth.
Professional teeth whitening may lighten some types of discolouration, but results vary and no particular shade can be guaranteed.
Does whitening prevent future stains?
No. Whitening changes the colour of natural tooth structure but does not prevent new surface staining or the natural changes that occur over time.
Maintenance may involve:
- Consistent oral hygiene
- Professional cleaning when clinically indicated
- Reducing smoking and frequent staining drinks
- Dentist-prescribed whitening maintenance when appropriate
Repeated whitening should not be performed simply because the teeth no longer look as light as they did immediately after treatment. Excessive or incorrectly used bleaching products may increase tooth sensitivity and irritate the gums.
Can whitening toothpaste remove stains?
Whitening toothpaste may help reduce some external surface staining. It generally produces less colour change than peroxide-based whitening because it mainly works at the tooth surface.
Some formulations are more abrasive than others. If you have sensitive teeth, exposed roots, enamel wear or dental restorations, ask your dentist which toothpaste is appropriate.
Charcoal, lemon juice, vinegar and other abrasive or acidic home remedies are not recommended. They may damage the teeth without predictably improving their colour.
Will whitening change veneers, crowns or fillings?
Whitening does not change the colour of:
- Porcelain veneers
- Composite veneers
- Crowns
- Bridges
- Fillings
- Implant crowns
- Dentures
As the natural teeth become lighter, existing restorations may appear different. Discuss this before whitening so you understand whether any colour discrepancy is likely.
Replacing a sound restoration solely for colour is elective and involves additional cost and biological considerations.
How often should teeth be professionally cleaned?
There is no single cleaning interval suitable for everyone.
Your recommended interval depends on factors such as:
- Plaque and calculus accumulation
- Gum health
- Smoking
- Dry mouth
- Medical conditions
- Previous gum disease
- Oral-hygiene effectiveness
- Dental restorations
- Individual staining patterns
A professional clean should be recommended according to clinical need rather than automatically scheduled every six months.
When should tooth discolouration be checked?
Arrange a dental assessment if:
- One tooth becomes darker than the others
- Tooth colour changes following an injury
- You notice pain, sensitivity or swelling
- A dark area appears around a filling or crown
- Discolouration is accompanied by bleeding or receding gums
- Staining does not improve with routine cleaning
- You are considering whitening but have untreated dental problems
A single dark tooth can sometimes indicate internal damage and should not simply be treated with an over-the-counter whitening product.
Discuss tooth staining and whitening in Perth
If you are concerned about staining or a change in tooth colour, an examination can help identify the cause and determine whether professional cleaning, whitening, restorative treatment or monitoring may be appropriate.
Contact Smile Design Studio in Mosman Park, Perth, on (08) 9468 3322 or request an appointment online.
This information is general and does not replace individual dental advice. Causes of discolouration, treatment suitability, risks and whitening results vary between patients.
