Why do interdental cavities occur and how can you prevent them?

Interdental cavities, also known as interproximal caries, are cavities that form on the lateral surfaces of the teeth, as their name suggests. This type of cavity is commonly found in both children and adults, and if left untreated, can lead to various complications, including tooth loss. Below, we’ll explain why these cavities form and what you can do to prevent them.

Why do interdental cavities occur? Causes and risk factors

The main cause of interdental cavities is poor oral hygiene. Interdental spaces are difficult to clean with a toothbrush alone. Without a complete oral hygiene routine—including the use of dental floss, an oral irrigator, and/or interdental brushes—a favorable environment is created for plaque buildup. This plaque is a sticky, colorless film that constantly forms on the teeth. The bacteria in plaque break down sugars from food, producing acids that erode the tooth enamel, resulting in cavities between the teeth.[1][2][3]

Beyond insufficient oral hygiene, there are several other factors that can contribute to the development of interdental cavities. These include:

• Excessive consumption of sugary, sticky, or acidic foods;
• Untreated dental crowding (cleaning crowded teeth and the spaces between them is much harder than cleaning properly aligned teeth; orthodontic treatment can help correct this);
• Reduced saliva production or altered saliva composition;
• Smoking and alcohol consumption;
• Lack of regular dental check-ups.[1][2][3]

Why are interdental cavities dangerous and how can they be detected?

Interdental cavities are dangerous because they are difficult to detect in their early stages. At this point when they would be much easier to treat they are often asymptomatic. When signs do appear, they can be very hard to spot with the naked eye, even for a dentist.[1][2][3]

Symptoms usually arise once the enamel is already compromised and may include: tooth sensitivity, pain (especially when biting), and the appearance of black, brown, or white spots on the tooth surface.[1][2][3]

Many interdental cavities can only be detected with the help of dental X-rays, but such an investigation is typically recommended only after a dental check-up. Without regular dental visits, it’s very easy for an interdental cavity to progress to the point of causing severe pain and other unpleasant symptoms, and to become untreatable—leaving tooth extraction as the only remaining option, which is never desirable.[1][2][3]

Tips and recommendations for avoiding interdental cavities

Preventing interdental cavities is much easier and less costly than treating them. However, it requires adopting simple yet essential habits for proper oral hygiene. Here are some tips and recommendations to keep in mind:

• Make sure to brush your teeth at least twice a day for two minutes using a soft-bristled toothbrush and fluoride toothpaste;
• Use dental floss, an oral irrigator, and/or an interdental brush daily to carefully clean the spaces between your teeth and ensure proper removal of plaque and food debris from these areas;
• Reduce your intake of sweets, fizzy drinks, and sticky snacks, which contribute to cavity formation. Instead, opt for fiber-rich foods like fresh fruits and vegetables, which can help increase saliva flow—this aids in cleaning the teeth and preventing plaque buildup;
• Visit your dentist at least twice a year for routine check-ups and professional cleanings. These visits not only help prevent interdental cavities but also allow for early detection and timely treatment;
• Stay well hydrated. Drinking water helps maintain adequate saliva flow, which supports the natural cleansing of the oral cavity;
• If you smoke, try to quit. Smoking negatively affects oral health and promotes plaque buildup, increasing the risk of interdental cavities[1][2][3]

What should you do if you have interdental cavities?

If you suspect you have an interdental cavity, it’s essential to consult a dentist. Treatment may include, depending on the severity of the cavity:

• fluoride treatment;
• dental filling;
• root canal therapy;
• tooth extraction[1][2][3]

Don’t postpone your dental visit if you’re already experiencing symptoms like tooth pain or sensitivity! As mentioned above, these symptoms of interdental cavities usually appear once the tooth structure is already affected, so it’s very important to act quickly to treat the cavity and avoid potential complications.

Interdental cavities are a common oral health issue, but they can be prevented through proper oral hygiene, a balanced diet, and regular dental check-ups. Adopting good dental care habits not only helps prevent cavities but also contributes to maintaining a healthy, beautiful smile in the long run. Remember: prevention is the key to a worry-free smile!

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