Can Sensitive Teeth Be Whitened?: Tips and Precautions!

Sensitive teeth often make the idea of whitening daunting for many. Concerns about potential discomfort or pain can deter individuals from undergoing treatment, especially since tooth sensitivity is a common side effect of many teeth whitening treatments, particularly those involving hydrogen peroxide.

However, there are whitening options designed specifically for sensitive teeth that can help you achieve a brighter smile without causing discomfort. Effective whitening for sensitive teeth is achievable with the right approach and precautions!

But, how?

Well, the key lies in consulting your dentist beforehand and opting for whitening treatments for teeths under their guidance. Modern professional teeth whitening agents now offer improved safety standards, making it easier than ever to brighten and whiten teeth, even for those with sensitivity.

What causes tooth sensitivity?

Let's explore why your tooth is sensitive in the first place. Tooth sensitivity arises when there is a disruption in the normal structure of the tooth, particularly involving its outermost and protective layer, the enamel. Therefore, tooth sensitivity may occur due to the following reasons.

Enamel Damage

Enamel is the hardest substance in the human body. However, factors such as aggressive brushing, acidic foods and drinks or teeth grinding can wear down the enamel over time. As enamel thins or develops microscopic cracks, it becomes less effective in protecting the vulnerable underlying layers from external stimuli.

Gum Recession

Normally, the gums cover the neck of the tooth where the crown meets the root, protecting the sensitive root surfaces. When gums recede due to factors like gum disease, aggressive brushing or aging, the root surfaces can become exposed. Unlike hard enamel, the root surface is covered by softer tissue that lacks the same level of protection. Exposed roots can lead to increased sensitivity.

Tooth Decay (cavities) and Deep Fillings

Cavities are areas of damage to the tooth caused by bacterial acids. As decay progresses, it eats away at the protective enamel layer and eventually reaches the vulnerable inner layers. Deep fillings, which are used to treat extensive decay, can also result in sensitivity if they are close to the tooth's pulp, where the nerves are located.

Any existing dental issues should be addressed before attempting tooth whitening. During your check-up, your dentist will identify the cause of your tooth sensitivity. Once these issues are treated, we can safely proceed with whitening your teeth, giving you the perfect smile.

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Can teeth whitening cause sensitivity?

Teeth whitening can cause sensitivity, particularly in individuals with already sensitive teeth. This common side effect is typically temporary and can be managed with proper precautions and care. Below are some reasons why teeth whitening may cause sensitivity.

1) Exposure to Whitening Agents

Whitening products contain active ingredients like hydrogen peroxide or carbamide peroxide, which penetrate enamel to break down or removing stains. During this process, the inner tooth layer (dentin) and the nerves can become temporarily exposed, causing sensitivity.

2) Dehydration of Teeth

Whitening agents dehydrate teeth by removing moisture from the tooth structure. This dehydration can heighten sensitivity, especially to temperature changes and certain foods or drinks. Fortunately, this type of sensitivity is usually temporary and subsides as the teeth rehydrate.

3) Existing Dental Conditions

Individuals with pre-existing dental issues such as worn enamel, cavities, gum recession or exposed dentin are more likely to experience increased sensitivity during and after teeth whitening. Addressing these conditions before whitening can help minimise sensitivity.

4) Gum Irritation

If the whitening gel comes into contact with the gums, it can cause irritation and increase sensitivity in the surrounding area. Proper application techniques and the use of custom-fitted trays can help minimise this risk.

During your consultation, your dentist will work with you to determine the most effective whitening option for your smile.

What precautions can I take to avoid sensitivity after teeth whitening?

What are the professional options available for whitening sensitive teeth?

Professional teeth whitening can be done either in-office or at-home. In-office whitening is performed at the dental clinic using a high concentration of whitening gel activated by special lights. This method delivers immediate results, often in just one visit.

Whitening toothpastes, are a great option for those with tooth sensitivity. These toothpastes work by gently removing surface stains while also calming the nerves in your teeth, which helps reduce sensitivity.

On the other hand, at-home whitening systems also provide effective results but over a longer period, usually several weeks. Using custom-fitted trays at home, you apply whitening gel daily to gradually whiten your teeth over time. Home teeth whitening is a convenient way to whiten your teeth at home, but care should be taken to select products that are gentle yet effective. While these options may take longer to achieve the desired results, they are a safer choice for those with sensitive teeth. 

Read more about the different teeth whitening procedures here.

What are the alternatives to teeth whitening for sensitive teeth?

For individuals with sensitive teeth who wish to avoid teeth whitening methods, several alternatives are available:

• Tooth Bonding – This involves applying a tooth-coloured composite resin material to the tooth surface to cover areas of discolourations or minor imperfections like chips or cracks.
• Dental Veneers –  These are custom-made thin shells that fit over the front surface of teeth. Before placement, a small amount of enamel is typically removed for a proper fit and natural appearance.
• Dental Crowns – Dental crowns cover the entire tooth and are made from materials like porcelain, metal or a combination. They also require shaving of tooth structure to improve both esthetic and functional aspects of the tooth.

While teeth whitening can pose challenges for those with sensitive teeth, it can be successfully achieved with the right approach and precautions. Consulting with a dentist to identify the causes of sensitivity can help minimise discomfort.

Find out how our dentists can help you achieve a brighter smile. 

References

• Pierote, J. J. A., Barbosa, I. F., Prieto, L. T., Lima, D. A. N. L., Paulillo, L. A. M. S., & Aguiar, F. H. B. (2019). Effects of desensitizing dentifrices on the reduction of pain sensitivity caused by in-office dental whitening: a double-blind controlled clinical study. Clinical, Cosmetic and Investigational Dentistry, 11, 219–226. https://doi.org/10.2147/CCIDE.S198940
• Kose C, Calixto AL, Bauer JR, Reis A, Loguercio AD. Comparison of the Effects of In-office Bleaching Times on Whitening and Tooth Sensitivity: A Single Blind, Randomized Clinical Trial. Oper Dent. 2016 Mar-Apr;41(2):138-45. doi: 10.2341/15-085-C. Epub 2015 Oct 28. PMID: 26509229.