Does coffee stain your teeth? How can you reduce the stains without giving up coffee?

For many of us, the day begins with a cup of coffee. And at the surgery, almost every week, I hear the question: ‘Doctor, do I have to give up coffee to keep my teeth clean?’

The short answer is: not necessarily. Coffee can change the appearance of your teeth, but the stains don’t appear the same in everyone. It depends on how often you drink coffee, how you drink it and how you look after your teeth.

It’s also important to distinguish between surface stains and the natural colour of the tooth, as they aren’t treated in the same way. And the good news is that there are several things you can do without giving up coffee altogether.

Coffee contains pigments that can settle on the surface of the enamel. The more frequently it is consumed, the more opportunities these pigments have to build up.

Oral hygiene also influences the build-up of stains, and other habits, such as smoking or frequent consumption of tea and red wine, can accentuate the appearance of stains.

What are extrinsic stains?

Extrinsic stains are discolorations found on the surface of the tooth.

They are frequently associated with:

• coffee;
• tea;
• red wine;
• tobacco;
• other strongly pigmented products.

These differ from intrinsic stains, which are located within the tooth structure, have different causes and cannot be removed simply by cleaning the surface. 

Not exactly. Black coffee, being richer in pigments, may have a greater potential to stain than coffee with milk.

However, the frequency of consumption, the length of time the coffee remains in contact with the surface of the teeth, and oral hygiene also play a very significant role.

Added sugar does not directly ‘stain’ the teeth, but it can affect oral health by promoting the build-up of bacterial plaque. And when bacterial plaque is present, pigments can adhere more easily to the tooth surface.

Yes. The frequency of consumption can influence the build-up of stains.

There is a difference between drinking a coffee in a relatively short space of time and sipping it in small sips over several hours. In the latter case, the tooth surface is repeatedly exposed, and the pigments remain in contact with the teeth for longer.

This exposure can be compounded by other sources of staining throughout the day, such as tea, red wine or certain foods.

You don’t necessarily need to cut out coffee completely to minimise the appearance of stains. What matters most is how you drink it and your hygiene habits throughout the day.

Drink water after your coffee

Once you’ve finished your coffee, you can take a few sips of water or rinse your mouth.

This reduces the time the pigments spend on the surface of your teeth, and staying hydrated also helps maintain a balanced oral environment.

Avoid drinking coffee throughout the day

If you drink it over a shorter period, you reduce repeated exposure and prolonged contact between the pigments and the surface of your teeth.

A coffee consumed gradually over several hours means more episodes of exposure than one drunk within a limited time frame.

Maintain good oral hygiene

Brushing twice a day and cleaning between your teeth helps to control bacterial plaque and staining.

It is important to:

• brush your teeth twice a day;
• clean between your teeth with dental floss or interdental brushes;
• use a suitable toothpaste;
• avoid brushing too hard.

Excessive pressure does not whiten your teeth and can irritate your gums or cause wear to the tooth surfaces.

Don’t brush your teeth straight after drinking coffee

In an effort to quickly remove traces of coffee, some people brush their teeth immediately after drinking it.

Coffee can be acidic, and brushing straight away can be harsher on the tooth surface. It is better to rinse your mouth with water first and wait a while before brushing.

Generally, a break of around 30–60 minutes before brushing is recommended.

The choice of treatment depends on the type of discolouration. If the problem mainly involves surface stains, a professional cleaning may be sufficient. If the patient wishes to achieve a shade lighter than their natural tooth colour, teeth whitening may be discussed.

Professional cleaning

Cleaning is effective for extrinsic stains, such as many of those associated with coffee, tea or tobacco.

However, it does not significantly alter the natural colour of the teeth; rather, it removes surface deposits and discolouration.

It may help to reduce certain superficial stains.

However, it does not alter the internal colour of the tooth to the same extent, and its effect must be distinguished from that of a teeth-whitening procedure.

Products with high abrasiveness should not be used excessively. The choice of toothpaste should be tailored to the condition of the enamel and any tooth sensitivity.

Coffee can primarily affect the colour of the tooth surface through the deposition of pigments, but it is also acidic.

The frequency of consumption, whether it is consumed with sugar or syrups, oral hygiene and hydration can all influence its effects on oral health.

It is important to distinguish between two phenomena:

• tooth staining, where pigments are deposited on the tooth surface;
• tooth erosion, in which the enamel structure is progressively lost.

They are not the same thing and require different approaches. 

Not every stain on your teeth is caused by coffee.

An assessment is recommended if:

• the stains do not disappear after cleaning;
• a single tooth changes colour;
• brown or black stains appear;
• you experience tooth sensitivity;
• pain or other symptoms occur.

The dentist can distinguish between simple superficial discolouration, tooth decay and a change occurring inside the tooth.