Brushing twice a day is considered essential for oral hygiene, yet many people notice their teeth turning yellow despite maintaining this routine. Experts say the reason lies in multiple underlying factors beyond just daily brushing.
Multiple causes behind tooth discolouration
According to dental experts, tooth discolouration is influenced by a combination of internal and external factors. These include ageing, genetic predisposition, and developmental changes in teeth.
Over time, the enamel—the outer protective layer—can become thinner, allowing the naturally yellowish dentine underneath to show through. This process is a normal part of ageing and cannot be prevented by brushing alone.
Diet plays a significant role
Diet is one of the most common causes of yellowing. Frequent consumption of tea, coffee, aerated drinks, wine, and coloured foods can stain the enamel.
When such foods and beverages are consumed regularly, stains can penetrate deeper into the teeth, making them harder to remove with regular brushing.
Tobacco and lifestyle habits worsen staining
Smoking and tobacco use are major contributors to tooth discolouration. The accumulation of nicotine and tar leads to stubborn stains that brushing cannot effectively remove.
In such cases, professional dental cleaning is often required to restore the natural colour of teeth.
Environmental and medical factors involved
Certain environmental conditions, such as high fluoride levels in drinking water, can lead to fluorosis—a condition that causes intrinsic staining of teeth.
Additionally, some medications, including tetracycline and iron supplements, are known to cause discolouration. Trauma to a tooth can also lead to changes in colour, often requiring specialised dental treatment.
Treatment options and preventive care
Treatment depends on the cause of discolouration. Surface stains can often be treated with professional cleaning and bleaching. In more severe cases, cosmetic procedures such as veneers, laminates, or crowns may be recommended.
Dentists advise maintaining good oral hygiene by brushing twice daily, attending regular dental check-ups, and rinsing the mouth after meals. Limiting staining foods and staying hydrated can also help prevent discolouration.
Awareness is key
Experts emphasise that brushing alone is not always enough to maintain white teeth. Understanding the underlying causes and seeking timely dental care can help manage and prevent long-term discolouration.