Internal teeth whitening in Palma
Internal whitening lightens a tooth that has darkened from the inside, usually after a root canal or a knock that damaged the nerve. Unlike conventional whitening, the gel is placed inside the tooth, which is where the stain is.
It is the most conservative way to restore the colour of a single dark tooth without touching the others. We carry it out at Udemax Miramar and Emardental, in Palma, and your first visit is free.
Only the darkened tooth is lightened
The gel works from inside the tooth
Depending on how the tooth responds
First visit and diagnosis
Is one tooth darker than the rest? Book an appointment
We examine the tooth, check the root canal treatment and explain whether internal whitening is the best option.
Leave us your details and we will call you back within three hours.

What is internal whitening?

Also known as intracoronal bleaching, it is a treatment for non-vital teeth, that is, teeth without a nerve. When the nerve dies or is removed during a root canal, remnants of blood and tissue, or certain materials, can stain the tooth from inside and turn it grey, yellow or almost black.
Because the stain is inside, external whitening barely improves it. That is why the whitening agent is placed in the chamber of the tooth, where it works directly on the stained area.
When is it suitable?
It is the right treatment if:
- You have a dark tooth after a root canal.
- A knock damaged the nerve and the tooth has turned grey or brown.
- The tooth has been stained by the materials of an old root canal.
- Only that tooth's colour bothers you, not your whole smile.
For this treatment, the tooth must have a sound root canal. If it doesn't, or it is poorly sealed, it has to be done or redone first.

Internal or external whitening
They are different treatments that can complement each other, but one does not replace the other:
Internal whitening
For a specific tooth darkened from inside.
- Only on teeth without a nerve, with a root canal
- The gel is placed inside the tooth
- It does not change the colour of neighbouring teeth
- 1 to 4 sessions
External whitening
To brighten your whole smile when the teeth are healthy.
- On teeth with a nerve
- The gel is applied to the surface
- It lightens all the teeth at once
- At Clínicas Udemax, with the KöR system
What is internal whitening like?
Assessment and shade taking
We take an X-ray to check that the root canal is well sealed and record the colour of the tooth with a shade guide, so we can measure the result.
Applying the gel
We open a small access at the back of the tooth and empty the crown chamber. Over the root canal filling we place a cement barrier so the gel cannot reach the root. Then we place the whitening gel and close the tooth with a temporary seal. The gel works over a few days.
Review and final seal
After a week we compare the colour. If needed, we repeat the application, usually one to four times. Once the colour is right, we close the tooth with a permanent restoration in the correct shade.
Care during and after treatment
While the tooth has the temporary seal and afterwards:
- Don't bite very hard foods with that tooth while it has the temporary seal.
- If you notice the temporary seal has moved or come out, call us.
- Avoid coffee, tea, red wine and tobacco during treatment.
- Brush as normal, including the treated tooth.
- Attend your check-ups: over the years the colour may darken slightly and can be touched up.
What if the tooth doesn't lighten enough?
Most teeth respond well, but some, especially very dark ones or those stained by certain materials, don't reach the desired shade. The tooth may also be weakened by large fillings.
In these cases the solution is to cover it with a veneer or a crown. Even so, lightening the tooth from inside first helps the veneer look more natural.
Where we carry out internal whitening
We provide internal teeth whitening at two of our clinics in Palma: Udemax Miramar and Emardental.
Cosmetic dentistry
Udemax Miramar
Outpatient department, Hospital Juaneda Miramar
Camí de la Vileta, 30 · 07011 Palma
- Monday to Thursday
- 9:00–13:00 · 16:00–20:00
- Friday
- 9:00–20:00
By car
Paid parking at the Hospital Juaneda Miramar car park, a one-minute walk away, plus street parking. There is also free parking on Camí de la Vileta, about a 10-minute walk away.
Go to the car parkBy bus
EMT bus routes 6, 8 and 29, stopping at "Policlínica", in front of the hospital.
View bus routeBy taxi
Taxi ranks at Camí de la Vileta, 51 and Carrer de Pasqual Ribot, 1.
Cosmetic dentistry
Emardental
Carrer d’Alfons el Magnànim, 2, ground floor
Bons Aires · 07004 Palma
- Monday to Thursday
- 9:00–13:00 · 16:00–20:00
- Friday
- 9:00–13:00
By car
Street parking and the Santa Pagesa underground pay car park (Carrer d’Ausiàs March, 26), a 4-minute walk away. There is also a pay car park at s’Escorxador, about a 5-minute walk away.
Go to the car parkBy bus
EMT bus routes 12, 20, 24 and 40, stopping at "Pl. d’Abú Yahya", "Alfons el Magnànim" or "31 de desembre".
View bus routeBy taxi
Taxi rank at Plaça d’Abú Yahya, 2.
Frequently asked questions about internal whitening
What is intracoronal bleaching?
It is another name for internal whitening: the whitening gel is placed inside the chamber of the tooth to lighten a tooth darkened after a root canal or a knock.
Can a single tooth be whitened?
Yes. If the tooth is dark because it has no nerve, internal whitening lightens just that tooth, without changing the colour of the others.
Why does a tooth darken after a root canal or a knock?
Because remnants of blood and nerve tissue, or certain root canal materials, stain the tooth from inside. That is why it turns grey, yellow or brown.
Does internal whitening hurt?
No. The tooth has no nerve, so you usually feel nothing and no anaesthetic is needed.
How many sessions are needed?
It depends on how dark the tooth is. Usually between one and four, a week apart.
Is it safe?
Yes, when carried out with the right protocol. The cement barrier over the root canal filling stops the gel reaching the root, which is what prevents complications.
How long does the result last?
It usually lasts for many years. Over time the tooth may darken slightly, and it can then be touched up.
How much does internal whitening cost?
It depends on the number of sessions and whether the root canal needs reviewing. At your free first visit we give you a detailed quote, and you can finance your treatment.