If your teeth don't stay white as long as you would like after bleaching at the dentist, it can be very frustrating. Fortunately, there are a few tips and tricks that can help you whiten your teeth again.

Why do teeth turn yellow again after bleaching?

The colour of teeth changes throughout life due to various factors such as proper dental care, diet and tooth texture. Proper brushing technique using a medium-hard toothbrush and brushing for 3 minutes twice a day will help maintain tooth colour. A balanced diet with plenty of fruits, vegetables, legumes and nuts will also help keep teeth healthy and white. The texture of teeth, particularly the structure of the enamel and roughness, can affect how susceptible they are to staining. The thickness of the dentin also affects the natural colour of teeth, with canines appearing darker than front teeth due to their thicker layer.

What to do if your teeth become yellow again?

It is important to note that after teeth whitening, teeth may be more sensitive in the first few weeks because the surface is more porous. Therefore, you should avoid vigorous brushing with whitening toothpastes or re-whitening and avoid discoloring foods such as coffee, tea, red wine and cigarettes. Electric or sonic toothbrushes and dental care chewing gum can help maintain tooth color. Polishing and fluoridation at the dentist can remove discoloration from teeth and smooth the surface. If only one tooth becomes darkly discolored, the cause should be clarified. The final tooth color only becomes apparent after a few days. If you are thinking about whitening your teeth again, you should definitely speak to your dentist first.

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