Internal bleaching

What is Internal Bleaching?

Internal bleaching is a cosmetic dental procedure designed to whiten a tooth that has become discolored from within. Unlike external tooth whitening treatments, which target surface stains on the enamel of the teeth, internal bleaching addresses internal discoloration typically caused by factors such as trauma, previous root canal treatment, or other internal chemical changes.

This type of staining can lead to a single tooth becoming noticeably darker than the surrounding teeth, creating an unbalanced appearance in your smile. Internal bleaching is specifically used on non-vital teeth—those that have undergone root canal treatment—since the discoloration occurs from within the tooth structure itself. The treatment involves placing a special whitening agent inside the pulp chamber of the affected tooth. Over time, this agent lightens the tooth from the inside out, helping it return to a more natural and uniform color.

When Is Internal Bleaching Necessary?

Internal bleaching is considered when a single tooth appears darker than the rest due to internal staining. Common reasons for this discoloration include:

• After root canal therapy: Even when a root canal is successful, the internal part of the tooth may darken over time due to remaining blood products, tissue remnants, or certain root canal materials.
• Dental trauma: An injury to a tooth can cause internal bleeding or pulp necrosis, both of which may lead to discoloration even without immediate symptoms.
• Use of older dental materials: Some materials historically used in root canal therapy, particularly pastes containing silver compounds, can darken a tooth over the years.

Internal bleaching is not suitable for whitening multiple teeth or vital teeth that are alive, meaning it is limited to specific cases with localized cosmetic concerns. For more general discoloration, external treatments such as professional whitening gels or strips are more appropriate.

How Does the Internal Bleaching Process Work?

The internal bleaching procedure happens over one or more dental visits and typically follows these steps:

1. Examination: Your dentist will evaluate the condition of the tooth through clinical examination and X-rays to ensure the root canal has been properly completed and there is no sign of infection or decay.
2. Creating access: A small hole is drilled at the back of the tooth to access the pulp chamber where the bleaching will occur.
3. Application of bleaching agent: The dentist places a whitening compound, usually either sodium perborate or hydrogen peroxide, inside the tooth’s hollow chamber.
4. Temporary seal: The tooth is sealed temporarily with a material that holds the bleaching compound in place and protects the area.
5. Monitoring and repeating: The whitening compound remains inside the tooth for a few days. The dentist may assess the color improvement and repeat the process if needed to achieve the desired result.
6. Final restoration: Once the appropriate shade is restored, the bleaching agent is removed, and the tooth is permanently filled and sealed with a tooth-colored composite resin.

Since internal bleaching is performed on a non-vital tooth, the procedure is typically pain-free.

Benefits of Internal Bleaching

Internal bleaching offers several benefits, including:

• Preservation of natural tooth structure: It provides a whitening result without the need to grind down or remove any of the tooth’s external structure, unlike crowns or veneers.
• Targeted whitening: Ideal for isolated cases where only one tooth has become discolored.
• Minimally invasive: It involves low levels of discomfort and avoids surgical or more complex restorative procedures.
• Cosmetically effective: With proper technique, it restores the natural appearance of the tooth, enhancing overall smile aesthetics.

Who Is a Suitable Candidate?

Internal bleaching is best suited for individuals who:

• Have completed successful root canal treatment on the affected tooth.
• Are concerned about the appearance of a single dark tooth.
• Do not wish to undergo more invasive procedures such as crowns or veneers.
• Have no signs of reinfection, cracks, or structural complications in the tooth.

If the internal discoloration is due to persistent trauma or certain types of stains that don’t respond well to bleaching, your dentist may recommend alternatives such as aesthetic crowns or coverings.

Limitations and Considerations

While effective, internal bleaching is not a universal solution. There are several important factors to consider:

• Results may fade over time: The whitening effect is not always permanent. Re-treatment may be needed if discoloration reappears, especially with frequent consumption of staining agents like coffee, tea, or tobacco.
• Unpredictable response: Each tooth may respond differently, and some intrinsic stains are resistant to bleaching agents.
• Risk of internal damage: If not properly sealed after treatment, there is a potential for bacterial leakage or weakening of the tooth structure.
• May require multiple sessions: While some patients see quick results, others may need multiple bleaching applications to achieve the desired shade.

A thorough dental evaluation is essential to determine whether internal bleaching is the right choice.

Internal Bleaching at ValbyTand

At ValbyTand, we recognize the impact a single discolored tooth can have on your smile—and your confidence. With over 75 years of dedicated service in Valby, we combine enduring expertise with the very latest dental technology to deliver high-quality, patient-centered care.

Our commitment to excellence is reflected in our use of advanced diagnostic tools, including Denmark’s first digital dental bank and complimentary 3D scanning during your first visit. This ensures precise planning and execution of treatments like internal bleaching.

Whether you’re seeking to restore the natural harmony of your smile or need guidance on the best cosmetic solution for your dental needs, our experienced team is ready to help with knowledge, precision, and care.