Internal Bleaching

Tooth discoloration can sometimes occur inside a tooth, particularly after root canal treatment or dental trauma. Unlike external stains caused by food, drinks, or lifestyle habits, this type of discoloration is internal and does not respond well to conventional whitening methods. In such cases, internal bleaching may be considered as part of a treatment plan to restore the tooth’s natural appearance.

At Alpha Dental, our dental team carefully evaluates each case to determine whether internal bleaching is appropriate. This treatment is performed under strict clinical standards with the aim of improving the colour of teeth that have darkened due to internal factors.

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What Is Internal Bleaching?

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Internal bleaching is a professional dental procedure designed to lighten a discoloured tooth from the inside. It differs from external whitening treatments, which focus on the tooth surface.

Discolouration of a single tooth may result from:

• Previous root canal treatment
• Pulpal necrosis (death of the dental pulp)
• Dental trauma leading to internal bleeding
• Residual blood or pulp tissue inside the tooth
• Certain restorative materials may stain over time

Internal bleaching involves placing a whitening material within the tooth’s pulp chamber (the hollow space inside the tooth where the nerve used to be). The bleaching agent works internally to gradually reduce darkening, resulting in a tooth that better blends with the surrounding dentition.

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When Is Internal Bleaching Recommended?

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Internal bleaching may be considered in the following situations:

• A tooth that has undergone root canal treatment but remains darkened
• A tooth that has discoloured following dental trauma
• Teeth that are otherwise structurally sound but have intrinsic stains
• Patients seeking a non-invasive alternative to a crown or veneer for aesthetic improvement

The treatment is usually performed only on non-vital (root canal-treated) teeth and requires a stable restoration to ensure safety and effectiveness.

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The Internal Bleaching Procedure

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At Alpha Dental, internal bleaching is carried out in a systematic and safe manner. The process typically involves:

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1. Clinical Examination

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The dentist begins by carefully examining the discoloured tooth. X-rays may be taken to ensure that the tooth has been adequately root canal-treated and that there are no underlying infections or complications.

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2. Isolation and Preparation

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The tooth is isolated with protective barriers (such as a rubber dam) to prevent leakage of bleaching materials. A small access is made through the existing restoration or filling to reach the pulp chamber.

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3. Placement of Protective Barrier

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A protective base is placed over the root filling to ensure that the bleaching material does not seep into the root canal system. This step is important to safeguard the integrity of the tooth.

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4. Application of Bleaching Agent

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A special bleaching material (commonly containing hydrogen peroxide or carbamide peroxide) is placed inside the pulp chamber. The chamber is then sealed temporarily to allow the material to act over a period of time.

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5. Monitoring and Repetition

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The patient returns for follow-up visits, during which the bleaching material may be refreshed until the desired improvement in colour is achieved.

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6. Final Restoration

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Once bleaching is complete, the chamber is thoroughly cleaned, and a permanent restoration (such as a composite filling) is placed to seal the tooth securely.

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Benefits of Internal Bleaching

• Targeted treatment – Works from within the tooth, addressing internal stains that external whitening cannot reach.
• Conservative approach – Helps preserve the natural tooth structure, often avoiding the need for a crown or veneer.
• Improved aesthetics – Restores a more natural, uniform appearance to the smile.

Limitations and Considerations

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While internal bleaching can provide significant improvement, there are factors to keep in mind:

• The extent of whitening may vary depending on the cause and severity of discolouration.
• In some cases, full correction may not be possible, and restorative options such as veneers or crowns may be discussed.
• Internal bleaching is typically suitable only for teeth that have been adequately root canal-treated.
• Close monitoring is required to ensure the tooth remains healthy after treatment.

Aftercare and Maintenance

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Patients are advised to:

• Attend regular dental reviews to ensure stability of the treated tooth.
• Maintain good oral hygiene to support overall dental health.
• Avoid habits that may cause staining of adjacent teeth (such as smoking or frequent intake of dark-coloured beverages).

Internal bleaching is usually long-lasting, but over time, some degree of discolouration may recur, requiring further treatment or restoration.

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Why Consider Internal Bleaching at Alpha Dental?

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At Alpha Dental, treatment decisions are always based on individual needs and clinical evaluation. Our dental team:

• Conducts thorough assessments before recommending internal bleaching.
• Ensures patient safety and protection throughout the procedure.
• Provides clear explanations of treatment outcomes, risks, and alternatives.

Our focus is on delivering evidence-based care, helping patients restore both function and aesthetics in a safe and responsible manner.

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Conclusion

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Internal bleaching is a conservative and effective option for managing discolouration in root canal-treated or traumatised teeth. By working from within, it offers an alternative to more invasive restorations while improving the tooth’s natural appearance.

If you have a discoloured tooth and would like to explore treatment options, you may arrange a consultation at Alpha Dental. Our team will carefully evaluate your condition and guide you towards the most suitable care plan.