If one of your teeth looks darker or more yellow than the others, you may be wondering why it’s happened and whether there’s a way to restore its natural appearance. A single discoloured tooth can be particularly noticeable, especially if it’s towards the front of your mouth.
The good news is that there are several ways to improve the appearance of a discoloured tooth. The most suitable treatment will depend on what’s causing the colour change, which is why it’s important to have the tooth assessed by a dentist before deciding on a solution.
Why Is Just One Tooth Discoloured?
Tooth discolouration can happen for several reasons, but when it affects just one tooth, there may be an underlying cause that needs attention.
Previous injury: A tooth that has been knocked or damaged may change colour over time. This can happen when the pulp inside the tooth is affected, even if there is no obvious damage to the outside.
Tooth decay: Decay can cause dark patches or changes in the colour of a tooth. If this is the cause, the decay will need to be assessed and treated rather than simply covered up.
Previous root canal treatment: Teeth that have undergone root canal treatment can sometimes become darker than the surrounding teeth. This may happen because of changes within the tooth or materials used during previous treatment.
Staining: Tea, coffee, red wine and tobacco can contribute to tooth staining. Although these usually affect several teeth, staining can sometimes be more noticeable on one particular tooth.
Changes to the tooth’s structure: Enamel defects or changes within the tooth can also affect its appearance, making one tooth look different from the rest.
Identifying the cause is an important first step, as not every type of discolouration will respond to teeth whitening in the same way.
How Can You Fix One Discoloured Tooth?
There are several treatment options that may help improve the appearance of a discoloured tooth. Your dentist will consider the cause of the discolouration, the condition of the tooth and the result you’re hoping to achieve.
Professional Teeth Whitening
Professional teeth whitening can help lighten natural teeth by reducing the appearance of certain types of staining and discolouration.
However, conventional whitening treatment generally affects the natural teeth being treated rather than selectively changing the colour of just one tooth. If your other teeth are already the shade you want, whitening alone may not be the most suitable option.
Some types of internal discolouration also respond less predictably to conventional whitening. A dental assessment can help determine whether whitening is likely to achieve the result you’re looking for.
Internal Tooth Whitening
If a tooth has become discoloured following root canal treatment, internal whitening may be an option.
Unlike conventional teeth whitening, which is applied to the outside of the teeth, internal whitening involves placing a whitening agent inside a suitable root-treated tooth. This can help lighten the tooth from within without covering its natural surface.
The treatment is not suitable for every tooth, so your dentist will need to check its condition and determine whether internal whitening is appropriate.
Composite Bonding
Composite bonding is another option for improving the appearance of a discoloured tooth. It involves applying a tooth-coloured resin to the surface of the tooth and carefully shaping it to blend with the surrounding teeth.
Bonding can be useful when whitening is unlikely to achieve the desired colour, although its suitability will depend on the degree and cause of the discolouration.
One of the advantages of composite bonding is that it can often be carried out with minimal alteration to the natural tooth. However, the material can stain or wear over time and may require maintenance.
Dental Veneers
A dental veneer is a thin covering placed over the front surface of a tooth to improve its colour, shape or appearance.
For suitable patients, a veneer may help address persistent discolouration that cannot be corrected adequately through whitening. The colour can be selected to complement the neighbouring teeth, helping create a more even-looking smile.
Veneers require careful planning, and some types involve removing a small amount of natural enamel. Your dentist will explain the benefits, limitations and alternatives before recommending treatment.
Dental Crowns
If the discoloured tooth is also weakened or significantly damaged, a dental crown may be considered.
A crown covers the visible part of the tooth, restoring its shape and helping protect the remaining tooth structure. It may be appropriate where there is substantial damage or previous dental work.
However, a crown is not usually necessary for a colour concern alone when the tooth is otherwise healthy. Your dentist will consider whether a less invasive option could achieve a suitable result.
Can You Whiten Just One Tooth?
This depends on what’s causing the discolouration.
If the tooth is stained on the surface, professional whitening may help. However, if the colour change is coming from within the tooth, conventional whitening may be less effective.
In some cases, internal whitening, composite bonding or a veneer may be more appropriate. The aim is to improve the appearance of the affected tooth while maintaining a natural-looking result and preserving as much healthy tooth structure as possible.
It’s also worth remembering that whitening does not change the colour of existing fillings, crowns or veneers. This is something your dentist will take into account when discussing your options.
When Should You See a Dentist About a Discoloured Tooth?
If you notice that one tooth has become darker, particularly if the change has happened suddenly or followed an injury, it’s important to arrange a dental assessment.
A change in colour can sometimes indicate damage to the pulp inside the tooth, even if you aren’t experiencing pain. Your dentist can examine the tooth and determine whether any further investigations or treatment are needed.
You should seek prompt dental advice if the discolouration is accompanied by pain, swelling or tenderness when biting. The underlying cause should be addressed before considering cosmetic treatment.
Fixing One Discoloured Tooth at Viva Dental
Having one discoloured tooth doesn’t necessarily mean you need to change the appearance of your entire smile. Depending on the cause, there may be a straightforward way to improve the colour and help the tooth blend more naturally with the others.
At Viva Dental in Carnforth, we offer a range of dental treatments, including professional teeth whitening and composite bonding, for patients across Lancaster and the surrounding Lancashire area.
If you’re concerned about a discoloured tooth, the first step is to arrange an assessment so we can establish what’s causing the change and discuss the most suitable options for you.
Contact Viva Dental to find out more about your treatment options and how we can help improve the appearance of your smile.
Frequently Asked Questions
Why is one tooth darker than the others?
A single tooth can become darker because of an injury, previous root canal treatment, tooth decay or changes within the tooth. A dental examination can help establish the likely cause.
Will teeth whitening fix one discoloured tooth?
It may help if the discolouration is caused by certain types of staining. However, whitening may be less effective for a tooth that has darkened following an injury or previous dental treatment.
Can a grey tooth be whitened?
In some cases, a grey tooth can be lightened, but the cause of the colour change needs to be established first. If the tooth has been injured or has undergone root canal treatment, your dentist will assess whether internal whitening or another treatment may be appropriate.
Is composite bonding suitable for one discoloured tooth?
Composite bonding may be suitable when a tooth’s colour cannot be improved sufficiently through whitening. It involves applying tooth-coloured resin to the tooth, with the shade and shape selected to complement the surrounding teeth.
Does a discoloured tooth always mean something is wrong?
Not necessarily, but a change in colour can sometimes indicate an underlying problem. If one tooth has become noticeably darker, it’s best to have it assessed by a dentist before deciding on cosmetic treatment.