Why are my teeth yellow even though I brush them?
Whitening, gums & laser
The short answer
Because yellowness is usually not dirt that a brush can remove. Part of it is stain from tea, coffee and smoking that has entered the enamel, and part is the naturally yellow dentine under the enamel, which shows more with age or thin enamel. Internal causes such as certain medicines, fluorosis or trauma also play a role. Dr. Khalid Saeed identifies the type of discolouration at his Duhok clinic before suggesting cleaning, whitening or anything else.
The detailed answer
A toothbrush removes plaque and stain sitting on the surface, but it cannot reach pigment that has soaked into the enamel, and it cannot change the colour of the dentine beneath. Dentine is naturally yellow and enamel is semi-translucent, so if your enamel is thin by nature or has worn over the years, from hard brushing or acidic drinks, the yellow shows through more. That is why one person can brush diligently and still look yellow while another looks lighter with little effort.
Surface (extrinsic) causes are the most common: strong tea, coffee, smoking and shisha, plus tartar that turns brown near the gums. Internal (intrinsic) causes include some antibiotics such as tetracycline taken in childhood, excess fluoride while teeth were forming, a single tooth darkening after a knock or root canal treatment, and ageing. The first group usually improves with a professional clean and teeth whitening; the second may need other options.
At Celebrity Smile Center in Duhok, Dr. Khalid Saeed checks the shade under proper light, makes sure the gums are healthy and there is no decay, then explains which type of stain you have. His rule is to start with the least invasive option: if cleaning and whitening are enough, there is no need for veneers. If the colour is internal or comes with wear and shape problems, bonding or veneers are discussed after a mock-up, with veneers made at Creative Art Dental Lab in Dubai.
Do not rely on harsh whitening toothpastes or charcoal powders to fix it: they only remove surface stain and can scratch enamel over time, which may make teeth look more yellow later. See our page on yellow and discoloured teeth, and send a daylight photo to Dr. Khalid to find out the right next step.
- Tea, coffee and smoking stain the enamel itself
- Dentine is naturally yellow and shows through thin enamel
- Tartar turns brown near the gumline
- Childhood medicines and fluorosis cause internal stain
- One dark tooth after a knock needs a nerve check
- Abrasive powders can make things worse
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