Question 1

Which teeth are suitable for internal tooth bleaching?

Accepted Answer

Internal tooth bleaching is exclusively suitable for devital, root-treated teeth from which the dental nerve has been removed. These teeth are prone to internal discolouration caused by blood breakdown products, old filling materials or mineral deposits within the tooth. Healthy, vital teeth are instead treated with external bleaching methods.

Question 2

Is the treatment painful?

Accepted Answer

No, internal tooth bleaching is generally completely painless, as the treated tooth no longer contains a nerve and therefore cannot transmit pain signals. The gums and surrounding soft tissue are carefully protected with special barriers throughout the procedure. In rare cases, a mild pressure sensation around the gum area may occur, but this does not indicate a complication.

Question 3

How long does internal bleaching take and how many appointments are required?

Accepted Answer

The entire treatment process typically spans 3–6 weeks and involves several dental appointments. Using the walking bleach technique, the bleaching gel remains inside the tooth for 5–7 days before the result is assessed and the gel is replaced if necessary. The exact number of sessions depends on the degree of initial discolouration and the desired level of whitening.

Question 4

How long do the results of internal tooth bleaching last?

Accepted Answer

The whitening effect achieved through internal tooth bleaching typically lasts between 2 and 5 years. The long-term prognosis is influenced by several factors, including the quality of the final seal, individual tooth characteristics, and consumption of staining foods and beverages. Top-up treatments can be carried out as needed and generally require less effort than the initial procedure.

Question 5

Are there any risks or side effects associated with internal tooth bleaching?

Accepted Answer

Internal tooth bleaching is considered a safe and well-established procedure when performed by an experienced dentist. A rare but recognised side effect is external root resorption, in which the outer surface of the tooth root is gradually broken down. This risk is minimised through the use of a protective barrier, appropriate gel concentrations and regular follow-up appointments.

Internal Bleaching Vienna – Whitening Discoloured Teeth