From Screen to Smile: How Blue-Light Exposure Affects Your Teeth (and What to Do About It)

One aspect that you might be concerned about is blue light exposure and the impact this might have on your oral health. Blue light is harmful because it disrupts our circadian rhythm by mimicking sunlight. This is why it is often advised to avoid blue light close to bedtime, as it can impact how easily you drift off to sleep.

But what about your oral health? Can blue light impact your teeth? There is very little evidence to suggest that blue light from screens and digital devices will have any impact on your oral health. In fact, blue light is used quite extensively in dentistry, and it is very safe when used correctly.

When it comes to blue light, it is your sleep patterns and your eyes that are most at risk. Using blue light blocking filters or blue light glasses can help to limit the impact. 

Blue light and oral health

Some people might be concerned that blue light from their screens could damage their teeth, in a similar way to UV light. The two are very different, and your teeth are unlikely to be impacted by exposure to blue light from screens.

Your teeth are made up of hard structures that are not easily impacted by light, even blue light. The only exception might be from exposure to blue light used in home teeth whitening products.

Many teeth whitening products will come with a small mouthguard with integrated blue LEDs. These are designed to activate the whitening ingredients and speed up the whitening process. In reality, these products are not as effective as dentist-supervised whitening products.

How is blue light used in dentistry?

Blue light is widely used in dentistry for key procedures, including routine procedure, restorative and cosmetic. Here are some of the most popular ways that your dentist might use blue light to safely facilitate a treatment plan:

Teeth whitening – if you opt for in-chair whitening treatments, you can expect that your dentist will use a strong light to activate the whitening agents. This is very safe when handled by a professional, and there is very little risk of damaging your teeth or enamel.

Dental fillings – when you have a tooth-coloured filling, this material will be cured, or hardened, using a strong blue UV light. This can be directly directly at the resin to turn the soft material into a hard, tooth-like material

Composite bonding – like with the dental filling procedure, composite bonding is also cured and hardened using a blue light. This is also very safe when handled by a professional.

If these tools are not handled correctly, there could be a risk of burns to the gums or the pulp of the tooth, but your dentist will manage this risk by ensuring the light does not get too close or cause damage to your teeth.

Final thoughts

While there might be lots of things in the world that can damage your teeth, blue light from your digital devices is not something that you need to worry about. It can disrupt your sleep patterns, and it might impact your eyes, but it isn’t going to cause damage to your teeth. Blue light can be used very safely in dentistry, provided it is used by a professional. If you have a home device that uses blue light to activate whitening products, make sure you are following the instructions carefully.