Uneven Teeth Whitening – Why Does It Happen and How to Prevent It?

This article will help you understand what can go wrong during whitening and what you can do to achieve a balanced, even smile.

Why Does Uneven Whitening Occur?

1. Different enamel structure
Some teeth (or parts of them) have different thickness or porosity of enamel – which means they react differently to whitening agents.

2. Incorrect use of strips or gel
Not applying enough product, applying it unevenly, or leaving it on for too short a time can cause spots or streaks.

3. Presence of fillings, crowns, or veneers
Dental materials do not whiten – so areas with fillings or crowns will remain darker compared to natural teeth.

4. Previously invisible stains
Whitening can highlight hidden enamel defects, such as fluorosis spots or demineralization marks.

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What Can You Do?

✅ Be patient
When whitening at home, the effect may even out gradually – don’t stop the treatment after just 1–2 days.

✅ Apply the product evenly
If you use strips – make sure they adhere properly to each tooth.
If you use gel – spread it evenly over the entire surface.

✅ Consult your dentist
If the problem is noticeable and does not go away after completing the treatment, consider:

• In‑office whitening with custom trays,

• Masking defects (e.g., bonding),

• Aesthetic restorations matched to your natural tooth color.

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How to Care for Your Teeth After Uneven Whitening?

Use whitening toothpastes with balancing effects that gently brighten teeth without aggressive abrasion.
In our range, you’ll find toothpastes that:

• Support natural whitening,

• Strengthen enamel,

• Are ideal after whitening treatments.

Try: Crest 3D White Brilliance Whitening 2‑Step Toothpaste (113 g & 65 g).

Uneven whitening results can happen – but in most cases, they are temporary or can be corrected.
The most important factors are proper application, patience, and regular care. And if you’re unsure, don’t hesitate to consult your dentist.