Teeth Whitening

What Is Teeth Whitening?

Teeth whitening, also known as bleaching, is a dental procedure that lightens discolouration in the enamel and the underlying dentine using professional-grade gels. These gels typically contain hydrogen peroxide or carbamide peroxide, which penetrate the tooth tissue and break down pigment molecules (chromogens) into smaller, less coloured fragments, so that the tooth appears lighter in shade while its own structure is preserved.

Whitening does not grind away, cut or cover tooth structure. When performed under the supervision of a dentist and with the correct indications, it is considered a tissue-friendly procedure in modern dental practice. Because the gel concentration, contact time and frequency of application are adjusted individually by the dentist, the process remains controlled and predictable.

It is regarded as one of the most conservative options in aesthetic dentistry, since it aims to lighten the existing tooth structure without drilling, veneers or other restorations. In a comprehensive smile design plan, whitening is often the first step carried out before other aesthetic treatments. The shade that can be achieved varies with the cause of the discolouration, the starting shade and the individual structure of the teeth.

Why Do Teeth Change Colour?

Discolouration is generally classified as either extrinsic (on the surface) or intrinsic (within the tooth tissue). Extrinsic stains accumulate on the enamel surface, while intrinsic discolouration originates in the dentine itself. Identifying the source correctly is essential for choosing the right whitening method and setting a realistic shade goal.

• Staining drinks such as tea, coffee and red wine, as well as smoking
• Age-related thinning of the enamel, which makes the yellower dentine underneath more visible
• Internal discolouration in teeth that have had root canal treatment
• Certain antibiotics taken during tooth development (for example tetracycline) or excessive fluoride intake
• Superficial staining linked to plaque and tartar build-up
• Darkening of a single tooth following dental trauma

How does the cause of staining affect the result?

Superficial stains usually respond well to a combination of professional cleaning and whitening. Intrinsic conditions such as banded tetracycline staining or advanced fluorosis may take longer to treat, or whitening alone may not be sufficient; in such cases the dentist may consider combining whitening with veneers or crowns. For a detailed comparison of the available techniques, you can read our article on teeth whitening methods.

Is Whitening the Same as Professional Cleaning?

No. Scaling and polishing are preventive treatments that remove plaque, tartar and superficial stains from the tooth surface; they do not change the intrinsic colour of the tooth. Whitening, on the other hand, acts on the pigment molecules inside the tooth tissue and lightens its shade. The two procedures are not alternatives; in most cases they complement each other.

For this reason, a professional cleaning is usually recommended before whitening. A clean tooth surface allows the whitening gel to act evenly and predictably on the tissue, and removing plaque and tartar also benefits gum health and overall oral hygiene.

Who Is a Suitable Candidate for Whitening?

Whitening is an option for adults with healthy teeth and gums who are unhappy with the shade of their teeth. Any decay, leaking fillings or gum inflammation must be treated before whitening can begin, because the gel can irritate compromised tissues.

The procedure is generally not recommended during pregnancy or breastfeeding, for patients under 18, or where advanced enamel defects are present. In patients with large fillings or crowns in the smile zone, expectations should be discussed carefully, as restorations are not affected by the whitening gel.

Whether whitening is appropriate for you, and which method suits you best, differs from person to person; the treatment plan is determined through a clinical examination by the dentist.

What is assessed before whitening?

During the examination, the dentist reviews the following points, both for the safety of the procedure and to set a realistic shade goal:

• Presence of decay, leaking fillings or fractured restorations
• Gum health, including inflammation or recession
• Enamel structure, cracks and any history of sensitivity
• The condition of fillings, crowns and veneers in the visible area
• The cause of the discolouration and the starting shade

In-Office or At-Home Whitening: What Is the Difference?

In-office whitening is carried out at the clinic by the dentist. After the gums are isolated with a protective barrier, a higher-concentration whitening gel is applied to the teeth and may be supported with a light source. A visible change in shade is usually observed within a single session of around 45 to 60 minutes.

At-home whitening uses custom-made clear trays together with a lower-concentration gel. The trays are worn for the period recommended by the dentist, usually over one to three weeks, and the shade lightens gradually under regular review.

Which method is preferred depends on the type of discolouration, your history of tooth sensitivity and your daily routine. This assessment is made together with your dentist during the examination.

What are combined and single-tooth (internal) whitening?

In some cases the two methods are planned together: an in-office session provides a rapid start, and custom trays are then used at home to balance and stabilise the shade. For a single discoloured tooth that has had root canal treatment, internal (non-vital) whitening, where the gel is placed inside the tooth, may be preferred. The appropriate approach is decided according to the findings of the examination.

How Does the Process Work at ADEN Dental?

At our clinic in Çukurambar, Ankara, teeth whitening follows a standard protocol that is tailored to each patient:

• Examination: teeth and gums are assessed, the cause of the discolouration is identified, and existing fillings or crowns are reviewed.
• Planning: the current shade is recorded with a shade guide and the most suitable method — in-office, at-home or combined — is agreed together with you.
• Preparation: professional cleaning and polishing are performed first if needed, and protective measures are planned for patients with a history of sensitivity.
• Application: for in-office whitening the gums are isolated with a barrier and the gel is applied in controlled cycles; for at-home whitening custom trays are prepared and the usage schedule is explained.
• Follow-up: the final shade is compared with the initial records, any sensitivity is managed, and advice is given on maintaining the result.

How Should You Care for Your Teeth Afterwards?

For the first 48 hours after treatment, the enamel is more receptive to staining agents. Tea, coffee, red wine, acidic drinks and strongly coloured foods should be avoided during this period, and smoking is not recommended; this short routine is often referred to as the white diet.

Temporary sensitivity to hot and cold may occur and usually settles within a few days.

How well the new shade holds also depends on daily habits: rinsing the mouth with water after staining foods or drinks is a simple but effective precaution. Regular brushing, flossing and routine check-ups all help to preserve the result for longer.

What should you do if sensitivity occurs?

Post-treatment sensitivity is usually mild and temporary. Avoiding very hot and cold foods for a few days, using fluoride or potassium nitrate toothpastes recommended by your dentist and brushing gently with a soft-bristled brush are usually sufficient. If sensitivity lasts longer than a few days or gradually increases, contact the clinic.

How Can the Result Be Maintained in the Long Term?

How long the new shade lasts depends on several factors: dietary habits, smoking, oral hygiene and the structure of the enamel. Drinking staining beverages through a straw, rinsing with water afterwards and keeping a regular brushing and flossing routine all help to preserve the result.

Routine check-ups and professional cleanings every six months prevent superficial stains from building up and make it possible to identify the right time for a refresh. Short touch-up applications under dental supervision can support the shade without the need for a full whitening course.

Whitening can also be the first stage of broader aesthetic planning such as veneers or a Hollywood Smile. If such a plan is being considered, the shade of any new restorations should be selected after whitening has been completed.