Brown teeth — including brown stains and spots — can be caused by a range of factors: dark-coloured foods and drinks (including those with artificial colours), nicotine and tobacco, tartar (which can worsen due to smoking, hormonal changes, diabetes and other medical conditions), tooth decay, ageing (white enamel naturally wears out over the years), and genetics.
We may or may not have control over some of those causes, but we do have control over how to keep our teeth looking bright and white. For example, there are now over-the-counter whitening mouthwashes and toothpastes (often containing hydrogen peroxide and/or sodium hypochlorite). Maintaining excellent oral hygiene can also go a long way to lightening the colour of your teeth and preventing brown stains from appearing in the first place.
Common Causes of Brown Teeth
- Dark-coloured foods and drinks (coffee, tea, red wine, artificial colours)
- Nicotine and tobacco products
- Tartar build-up — worsened by smoking, hormonal changes or diabetes
- Tooth decay and weakening of the enamel
- Natural ageing — white enamel wears down over time
- Genetics and inherited dental characteristics
Can Brown Teeth Be Whitened?
The short answer is yes — and there's a wide range of solutions available. Over-the-counter products might do the trick for mild discolouration, and maintaining good oral hygiene can help lighten the brown colour and naturally brighten your smile.
However, the results might not satisfy you because surface-only solutions don't deal with the root cause. For example, brown spots and stains caused by nicotine and tobacco particles that have become lodged in the enamel's microscopic pores are difficult — or even impossible — to remove with just an over-the-counter mouthwash or toothpaste. The same applies to tartar: once it builds up, only a dental professional can safely remove it.
Over-the-counter products also don't act on the root cause of discolouration. This is especially true with tooth decay, where the enamel is already weakened or compromised. As the enamel thins, the natural yellowish layers of the teeth become more visible. The appearance worsens further due to plaque, tartar and bacteria — whose acids cause breaks, holes and cracks in the teeth, creating new sites for food debris to accumulate and bacteria to thrive.
To solve that problem, it's important to go to the root cause — tooth decay. A dentist can perform a thorough cleaning to remove plaque and tartar build-up, and may recommend dental fillings or crowns to cover the affected areas. Good oral hygiene practices are then recommended to prevent or significantly slow down tooth decay going forward.
What a Dentist Can Do
- Scrape off reversible brown spots professionally and safely
- Apply fillings, veneers or crowns to cover permanent staining
- Match restorations to the natural colour of surrounding teeth
- Treat the underlying cause — such as tooth decay — before whitening
- Advise on preventing brown discolouration from returning
Most brown spots are reversible and removable when treated by a dental professional. However, there are permanent brown stains that can permanently affect your smile. The good news is that a dentist can hide that discolouration using fillings, veneers and crowns — restorations that are designed to last and create natural-looking smiles by matching the colour of the surrounding teeth.
Dangers of Do-It-Yourself Approaches
There are several self-help tips found online. Some can be genuinely helpful when they're not too harsh or invasive. For example, some people find that brushing with baking soda (mixed with water) is effective for teeth whitening, while others try rinsing with diluted hydrogen peroxide. Some even attempt to manually scrape brown spots themselves.
DIY Risks to Be Aware Of
- Scraping brown spots at home: Can cause further damage to the enamel, create new sites for bacteria, and even cause bleeding by hitting surrounding gum tissue.
- DIY baking soda mixtures: Estimating amounts is far from accurate. Too much baking soda can scrape off enamel and reveal the yellowish layer underneath.
- Diluted hydrogen peroxide solutions: Incorrect concentration or overuse can cause stomach pain if accidentally ingested, and may irritate or inflame gum tissue.
DIY approaches might only bring temporary results and often don't address the root cause. On the other hand, during a dental visit you will be introduced to more effective, targeted solutions for achieving a better smile — solutions that are safe, evidence-based and designed to last.
As a result, it's crucial to start with a dental consultation. A professional can identify whether the discolouration is superficial or structural, and recommend treatments that will show real, long-term results.
"Your Smile. Our Passion."
Professional dental care delivers results that DIY approaches simply can't match. Book a consultation to find the right solution for your smile.