Dentin Hypersensitivity: Causes and Treatment

Dentin Hypersensitivity: Causes and Treatment

Dentin hypersensitivity is a common oral condition characterized by a sudden sharp pain in response to certain triggers such as cold, hot, sweet, or acidic foods and drinks. It can be caused by a variety of factors such as gum recession or erosion of the tooth enamel. Fortunately, there are several treatments available that can help reduce or eliminate the pain associated with dentinal hypersensitivity. In this article, we will explore the causes and treatments for tooth sensitivity in more detail.

What is Dentin Hypersensitivity?

Dentin is filled with thousands of tiny dentinal tubules that run from the dentin surface to its nerve center. When these dentinal tubules become exposed due to enamel erosion or gingival recession, they can be stimulated by cold temperatures, sweet, hot, or acidic foods and drinks. This will create a sharp, sudden pain in the affected area which is known as dentinal hypersensitivity.

Causes and Risk Factors

There are several common causes and risk factors that can lead to tooth sensitivity. These include enamel erosion due to acid wear, gingival recession, periodontal disease, tooth brushing with too much force or an abrasive toothpaste, grinding teeth (bruxism), and dental procedures such as bleaching or scaling.

1. Tooth Decay

When tooth enamel erodes, the dentinal tubules underneath it are exposed to oral bacteria and acid that can lead to cavities. Once these cavities become deep enough, they can reach the nerve center of the tooth, causing severe pain and sensitivity when triggered by cold or hot temperatures.

2. Gum Disease

Gum disease, or periodontal disease, is a bacterial infection of the gums that can cause inflammation and recession of the gum tissue. As the gums recede, they expose the dentinal tubules to irritants that can trigger sharp pain when exposed to cold temperatures or other triggers. 

3. Abrasion or Erosion

Abrasion is caused by brushing too hard with abrasive toothpaste, while erosion is due to acidic drinks and foods that can wear away at the enamel. In either case, the exposed dentinal tubules can be stimulated by cold or hot triggers.

4. Gingival Recession

Gingival recession is a condition in which the gum tissue surrounding the teeth recedes, exposing more of the tooth surface and dentin. This can be caused by periodontal disease, brushing too hard, or using an abrasive toothpaste. As the gums recede, they expose more of the underlying dentin which can lead to sensitive teeth.

5. Bruxism

Bruxism is a condition in which people involuntarily grind their teeth, usually during sleep. This can cause the tooth enamel to wear away over time, exposing the dentin and making them susceptible to triggers such as cold or hot temperatures.

6. Recent Dental Procedures

In the case of bleaching, the hydrogen peroxide used in the process can strip away the enamel and cause sensitivity. Similarly, during scaling, a dental instrument may scrape away some of the enamel which will expose more of the underlying dentinal tubules and increase the risk of sensitivity.

Treatment Options for Dentinal Hypersensitivity

1. Fluoride Treatments

This treatment involves the application of a fluoride-containing gel, varnish, or foam directly to the affected area. The fluoride helps to seal the exposed dentinal tubules, thus reducing sensitivity. In some cases, multiple treatments may be needed for the best results.

2. Desensitizing Toothpaste and Gels

Desensitizing toothpaste and gels is a common form of treatment for dentinal hypersensitivity. These products contain ingredients such as calcium carbonate, potassium nitrate, strontium chloride, and arginine bicarbonate that help to block the dentinal tubules, thus reducing sensitivity. Additionally, these toothpastes can help to remineralize the enamel, reducing further erosion.

3. Bonding Agents & Fillings

These can be used to seal the exposed dentin tubules and reduce the pain associated with sensitive teeth. A bonding agent is an adhesive material that is applied to the affected area and allowed to harden, covering the exposed dentinal tubules and providing relief from sensitivity. Fillings, on the other hand, are used to fill in cavities that have reached the nerve center of the tooth.

4. Root Canal Treatment

In cases where a cavity has reached the nerve center of the tooth, a root canal may be necessary. During a root canal procedure, a dentist will remove the infected nerve and pulp from inside the tooth and replace it with an artificial material (gutta -percha). 

5. Surgical Procedures

One of the most common surgical procedures used to treat dentinal hypersensitivity is gingival flap surgery. During this procedure, a small flap of gum tissue is made and pulled back to expose any damaged root surfaces and underlying dentin. The dentist can then fill in any exposed tubules with a bonding agent or other material to reduce sensitivity.

Preventing Dentinal Hypersensitivity

The best way to prevent dental hypersensitivity is to take steps to protect the enamel and gums. Here are some tips to keep in mind:

  • Practice good oral hygiene. Brush and floss your teeth regularly, using a soft-bristled toothbrush and non-abrasive toothpaste.
  • Avoid acidic foods and beverages. Acidic liquids like carbonated drinks, juice, and sports drinks can wear away the enamel on your teeth.
  • Use a desensitizing toothpaste or gel. These products can help to block the tubules and reduce sensitivity.
  • See your dentist regularly for routine cleanings and check-ups. This will help to identify any potential issues early on and prevent them from becoming worse.

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Our dental professionals are here to help you find the best treatment plan for your individual needs. Whether you’re experiencing dental hypersensitivity or other dental issues, we can provide the answers and solutions you need. Schedule a consultation today to get started.