A single tooth that is noticeably darker than its neighbours can be more distracting than overall yellowing, especially when it is a front tooth. Regular whitening often makes the problem more obvious, because the surrounding teeth lighten while the dark tooth does not. The good news is that there are specific treatments designed for exactly this problem.
The most common cause is trauma. A knock to a tooth, sometimes years earlier, can damage the nerve and blood supply inside. As the pulp breaks down, blood products seep into the tiny tubules of the dentine, turning the tooth grey, brown or pinkish. A tooth that has had root canal treatment can also darken over time. Less commonly, old metal fillings or decay can cause discolouration.
A dark tooth is a sign that something has changed inside it. Before any cosmetic treatment, your dentist will take an X-ray and test the tooth to check whether the nerve is still alive, whether there is infection, and whether root canal treatment is needed. Treating any underlying problem comes first.
For a tooth that has had root canal treatment, internal bleaching is often the most conservative solution. A small amount of whitening material is placed inside the tooth through a small opening at the back, sealed in, and replaced over a few visits until the shade matches the neighbouring teeth. The opening is then sealed with a tooth-coloured filling. It preserves natural tooth structure and avoids the need for a crown in many cases.
If internal whitening does not achieve a good match, or the tooth is also chipped, worn or heavily filled, a porcelain veneer or crown may be the better option. These can mask the discolouration completely and restore shape at the same time. Your dentist will discuss which option preserves the most tooth while giving a natural result.
Sometimes the best result comes from combining approaches, such as whitening all teeth externally and then whitening the dark tooth internally, or whitening first and then making a veneer to match the new shade. Planning the sequence carefully gives a smile where no single tooth stands out.
Often yes. If the tooth has had root canal treatment, internal whitening can lighten it from the inside. Other cases may need a veneer or crown.
A grey tooth often indicates nerve damage, but not always. Your dentist will test the tooth and take an X-ray to find out.
Results are generally long lasting, though some regression can happen over the years. A touch-up is usually possible if needed.
Have a darkened tooth assessed by our team. Learn more about teeth whitening in Al Ain.
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