White spots on teeth – an early sign of demineralisation

White spots on teeth are a common problem in both children and adults. These spots are often ignored or even mistaken for mere cosmetic imperfections, but they can be a sign of mineral loss in the tooth enamel, a process known as demineralisation.  

White spots should not be ignored, as they may indicate the onset of tooth enamel deterioration and the formation of cavities. In this article, we will discuss the causes of white spots on teeth, the importance of early treatment, the associated risks, and ways to prevent them. 

When tooth enamel loses its minerals, it becomes more vulnerable and porous, and white spots appear as a result of this process. The area becomes lighter in colour and may look like a white spot. This is due to the loss of calcium and phosphate, minerals that are essential for the strength of the enamel. It is important to understand that tooth enamel plays a vital role in protecting the dentine and the tooth’s nerve, so when teeth become demineralised, they are much more prone to tooth decay.

White spots do not cause pain or discomfort; however, when they appear, a visit to the dentist is necessary to assess the extent to which the outer layer of the tooth is affected. Although white spots are not cavities themselves, they indicate a state of enamel fragility that must be closely monitored. 

The difference between healthy enamel and demineralised teeth

Healthy enamel has a uniform, translucent colour and reflects light naturally. On the other hand, demineralised teeth look opaque and may have white spots, a sign that minerals have been lost from the enamel structure.  

If the demineralisation process progresses, it can develop into tooth decay and lead to permanent damage to the tooth. Early treatment of white spots is essential to prevent further deterioration of the tooth enamel and to maintain long-term dental health. In children, white spots may be more common due to dietary habits and poor oral hygiene, whilst in adults, they may arise from factors such as excessive consumption of acidic or sweet foods, as well as hormonal changes or medical conditions.

When do white spots on teeth most commonly appear?

White spots can appear at any age, but are most commonly found in children, due to less rigorous diet and oral hygiene.  

In teenagers and adults, they can appear due to frequent consumption of acidic drinks (such as fizzy drinks) or due to a dry mouth (xerostomia), which can reduce the effectiveness of saliva in protecting the teeth. 

It is important to know that white spots on teeth do not appear by chance, but are the result of certain habits. Here are the most common causes of this problem

Poor oral hygiene and the build-up of bacterial plaque

Bacterial plaque is the main cause of enamel demineralisation, and poor oral hygiene can contribute to the appearance of these white spots. Without thorough brushing, bacteria thrive, producing acids that demineralise the enamel.  

Frequent consumption of acidic or sweet foods

Acidic or sweet foods (found in citrus juices, sweets and fizzy drinks) can erode tooth enamel and accelerate the demineralisation process. Frequent consumption drastically lowers the pH in the mouth, creating a hostile environment for the enamel. This process, known as acid erosion, thins the protective layer of the tooth, allowing mineral loss and promoting the appearance of white spots, which are early signs of tooth decay.

Dental fluorosis

Dental fluorosis is a condition that arises as a result of excess fluoride (from drinking water or oral hygiene products) during tooth development. Essentially, the cells responsible for producing enamel are affected, leading to a defective structure. The result is those white (or even brown, in severe cases) spots with a chalky appearance, which indicate a disruption in enamel development during childhood.

Certain associated conditions (xerostomia or dry mouth)

A decrease in saliva production can promote the accumulation of bacteria and acidification of the oral cavity, increasing the risk of demineralisation.

Hypersensitivity and demineralisation at a young age

In young children, who may be more sensitive to environmental or dietary factors, demineralisation can occur even at a very young age. The enamel of primary (milk) teeth is thinner and less mineralised than that of permanent teeth, making it more vulnerable to acid attack. Prolonged bottle-feeding with sweet liquids (bottle caries) or difficulty in maintaining proper oral hygiene in the early years of life accelerates mineral loss, promoting the early appearance of white spots. 

White spots appear when tooth enamel begins to lose minerals, but the process is not entirely irreversible. If we intervene at this early stage, there is a good chance of restoring the lost minerals and preventing the development of cavities.  

If no treatment is sought when white spots appear, the enamel continues to lose minerals, and the spots can develop into early-stage tooth decay. This is a form of tooth decay that can be repaired through dental treatment, but which, if left untreated, can progress to the point of damaging the tooth’s structure. 

Failure to treat white spots properly can lead to irreversible damage to the tooth, and untreated tooth decay can develop into infections and severe pain. Furthermore, it can also affect general health, as untreated dental infections can lead to serious complications.

There are several options for treating white spots on teeth, for both children and adults.

Professional dental treatments

To prevent the progression of white spots and repair early demineralisation, there are several effective dental treatments that can be carried out by a dentist. These treatments are designed to help remineralise the enamel and halt the progression to early-stage tooth decay.

Fluoride varnish

One of the most commonly used treatments for tooth demineralisation is the application of a fluoride varnish. This is a gel or substance containing concentrated fluoride which is applied directly to the surface of the teeth by the dentist. Fluoride is essential for the remineralisation process, as it has the ability to strengthen the enamel and reduce the risk of caries formation.

How does fluoride varnish work?

Fluoride varnish creates a thin film on the surface of the teeth, which helps the fluoride to be absorbed into the tooth enamel. This helps to replenish lost minerals and protect the enamel against acid attacks from food or bacteria. The treatment is effective even in the early stages of demineralisation, when white spots are visible on the teeth.

Advantages:

• it is quick and painless to apply.
• provides long-term protection for the enamel.
• It is recommended for all patients, including children and those with sensitive teeth.

The ICON Technique – Non-invasive remineralisation of tooth enamel

The ICON technique (Infiltration of Conservative Lesions) is a non-invasive and effective treatment method for dental demineralisation and white spots. This technique is used to repair damaged tooth enamel without the need to remove the affected tooth tissue, making it an excellent alternative to traditional treatment methods.

How does the ICON technique work?

ICON uses a resin-based substance that penetrates the affected tooth enamel, infiltrating the demineralised areas and ‘filling’ them with a substance that recreates the natural appearance of the teeth. This helps to fade white spots and strengthen the enamel without the need for a traditional filling material.

Advantages:

• it is a minimally invasive treatment that does not require drilling
• it helps improve the appearance of the teeth
• it is effective in the early stages of demineralisation and can prevent them from developing into cavities

Professional dental fluoridation

Dental fluoridation is a dental treatment that involves applying a fluoride gel or solution directly to the teeth to strengthen the enamel and prevent the formation of cavities. Fluoride plays a crucial role in protecting the enamel and in the remineralisation process.

How does fluoridation work?

Fluoride helps to restore minerals lost from the enamel and prevent further demineralisation. The application of fluoride can significantly reduce the risk of tooth decay and can even reverse early-stage demineralisation when treated correctly.

Advantages:

• it is a simple and quick method of preventing tooth decay
• it reduces the risk of developing white spots and tooth decay
• it can be applied periodically, especially in patients at high risk of demineralisation (children, people who frequently consume sugar or acids)

What you can do at home to prevent tooth demineralisation

Apart from professional treatments, there are also a few steps you can take at home to prevent and combat tooth demineralisation. Here are some useful suggestions:

• Proper oral hygiene: Brushing correctly twice a day with a fluoride toothpaste is essential for protecting tooth enamel. It is important not to skip interdental brushing and to floss daily to remove plaque from hard-to-reach areas.
• Moderate consumption of acidic or sweet foods: Avoid frequent consumption of fizzy drinks, fruit juices and sweets, as these can accelerate enamel demineralisation. If you do consume such foods, try to rinse your mouth with water after every meal.
• Use a fluoride mouthwash: Using a mouthwash containing fluoride can help strengthen enamel and prevent demineralisation.
• A diet rich in calcium and vitamin D: A balanced diet, rich in calcium and vitamin D, is essential for maintaining dental health. Foods such as dairy products, leafy green vegetables and fish are excellent sources of nutrients for strong teeth.
• Calcium and fluoride supplements: If your diet is insufficient, it is advisable to consult your dentist or GP for guidance on choosing a suitable supplement.

The difference between cosmetic treatment (teeth whitening) and medical treatment for demineralisation

It is important to note that cosmetic treatments, such as teeth whitening, are not solutions for white spots caused by demineralisation. Teeth whitening is a cosmetic treatment that changes the shade of the tooth, but does not resolve structural problems with the enamel.

In contrast, medical treatments for tooth demineralisation, such as the use of fluoride varnish, the ICON technique or fluoridation, are designed to strengthen the enamel and combat mineral loss, having a long-term preventive and restorative effect on dental health. 

Preventing white spots on your teeth is much easier than treating them once they have appeared. Here are some steps you can take to prevent demineralisation:

• Proper daily oral hygiene: Brush your teeth twice a day, floss and rinse your mouth with mouthwash to remove plaque and protect the enamel.
• Regular dental check-ups: Regular visits to the dentist are essential for monitoring dental health and the early detection of white spots. A routine check-up can help with prompt intervention before the problem becomes serious.
• Avoiding risk factors: Limit your intake of acidic and sugary foods, and if you have a problem with dry mouth (xerostomia), discuss treatment options with your dentist.
• The importance of dental health education from an early age: Teach your children the importance of proper oral hygiene and a balanced diet to prevent dental problems from an early age.