Teeth whitening has become very popular. Many people want a bright smile. Whitening can help achieve that. But it can also cause sensitivity. This sensitivity can be uncomfortable and bothersome. Understanding how whitening works is important. Teeth whitening involves using products that contain bleaching agents. These agents remove stains and discoloration. The most common bleaching agents are hydrogen peroxide and carbamide peroxide. These chemicals penetrate the enamel and break down stains. The result is a whiter, brighter smile. However, this process can affect the teeth in other ways.
Why Does Teeth Whitening Cause Sensitivity?
Whitening products usually contain peroxide. Peroxide can irritate the teeth. It penetrates the enamel and reaches the dentin. The dentin has tiny tubes. These tubes lead to the nerves. When the peroxide reaches the nerves, it causes sensitivity. The nerves become more exposed and react to stimuli. The enamel is the hard outer layer of the teeth. It protects the dentin and nerves. When the enamel is thin or worn down, the dentin is more exposed. Whitening products can make this worse. The peroxide can penetrate deeper into the dentin. This leads to increased sensitivity.
Types of Whitening Products
There are many types of whitening products. Some are stronger than others. Here are a few common ones:
- Whitening strips: These are thin, flexible plastic strips coated with a whitening gel. They are easy to use and widely available.
- Whitening gels: These are applied directly to the teeth using a small brush. They can be used with or without a mouth tray.
- Whitening toothpaste: These contain mild abrasives and low levels of peroxide. They help remove surface stains.
- Professional treatments: These are done by a dentist. They use higher concentrations of peroxide and often include light or laser activation.
Professional treatments are often the strongest. They can cause more sensitivity. Over-the-counter products can also cause sensitivity, but they are usually milder. The strength and duration of the treatment can affect the level of sensitivity.
How Long Does Sensitivity Last?
Sensitivity from whitening is usually temporary. It can last a few days. In some cases, it can last a week. If it lasts longer, see your dentist. They can help. The duration of sensitivity depends on several factors. The type of whitening product used can affect how long sensitivity lasts. Stronger products with higher peroxide concentrations can cause longer-lasting sensitivity. The condition of your teeth before whitening also plays a role. Teeth with thin enamel or existing sensitivity may be more affected.
What to Do About Sensitivity
There are many ways to reduce sensitivity. Here are some tips:
- Use a desensitizing toothpaste: These toothpastes contain ingredients like potassium nitrate or stannous fluoride. They help block the tubes in the dentin and reduce sensitivity.
- Avoid very hot or very cold foods: Extreme temperatures can trigger sensitivity. Stick to lukewarm or room temperature foods and drinks.
- Brush gently with a soft-bristled toothbrush: Aggressive brushing can wear down the enamel. Use gentle strokes and a soft brush to protect your teeth.
- Take a break from whitening: Give your teeth time to recover. Pause your whitening treatments for a few days or weeks.
- Use a fluoride rinse: Fluoride helps strengthen the enamel. A fluoride rinse can help reduce sensitivity and protect your teeth.
A desensitizing toothpaste can help. It blocks the tubes in the dentin. This reduces the sensitivity. Avoiding very hot or cold foods can also help. These foods can make sensitivity worse. Brushing gently with a soft-bristled toothbrush can protect your enamel.