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February 21, 2025

Tooth Sensitivity – Causes, Treatments, and Prevention Tips for a Pain-Free Smile

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Dr Lyn Lee
Dentist

WHAT IS TOOTH SENSITIVITY?

Tooth sensitivity, also known as dentine hypersensitivity, is a sharp or sudden discomfort in one or more teeth when exposed to external triggers. This can happen when eating or drinking something hot, cold, sweet, or acidic, or even while brushing your teeth.

Tooth sensitivity occurs when the protective layers of the teeth become compromised, exposing the inner dentine layer. Dentine contains tiny tubules that connect to nerve endings. When these tubules are exposed, external stimuli can reach the nerves, causing pain or discomfort.

COMMON CAUSES OF TOOTH SENSITIVITY

1. Worn Down Enamel

Tooth enamel is the hard, outermost layer that protects your teeth. It can wear down due to:

  • Abrasion: Caused by aggressive brushing or using a hard-bristled toothbrush, leading to enamel wear over time.
  • Erosion: Occurs due to frequent consumption of acidic foods and drinks (e.g., citrus fruits, soda, wine) or exposure to stomach acids from conditions like acid reflux or bulimia.
  • Attrition: Natural wear that happens when teeth grind against each other, often excessively due to bruxism (teeth grinding or clenching).
  • Abfraction: Small wedge-shaped notches near the gumline, usually caused by excessive biting forces or misaligned teeth.

2. Gum Recession

Receding gums expose the roots of your teeth, which lack the protective enamel layer, making them more sensitive. Gum recession may be caused by:

  • Gum disease (periodontal disease)
  • Brushing incorrectly or too aggressively
  • Misaligned teeth, which put excess pressure on certain areas
  • Tooth grinding or clenching
  • Lip or tongue piercings that irritate the gums
  • High or tight frenal attachment (the tissue that connects the lip or tongue to the gums)

3. Other Dental Issues

Certain dental conditions can lead to tooth sensitivity as they can expose the inner layers of the teeth, leading to pain or sensitivity, including:

  • Cavities (tooth decay)
  • Worn down or broken fillings
  • Chipped or broken teeth
  • Fractured or cracked teeth

4. Dental Procedures

Some people experience temporary sensitivity after treatments such as:

This usually subsides within a few days.

HOW TO PREVENT TOOTH SENSITIVITY?

By understanding the causes and taking preventive measures, you can protect your teeth and reduce your risk of tooth sensitivity. Here are some practical tips:

1. Maintain Good Oral Hygiene

  • Brush twice daily using a soft-bristled toothbrush and fluoride toothpaste.
  • Consider using desensitising toothpaste, which helps block pain signals from reaching the nerve.
  • Avoid brushing too hard, as this can wear down enamel and cause gum recession.
  • Floss daily to remove plaque and food particles.
  • If using mouthwash, choose one without alcohol to avoid drying out your mouth.

2. Limit Acidic Foods and Drinks

  • Reduce consumption of acidic food/ drinks such as soda, citrus fruits, wine, and vinegar-based foods.
  • When drinking acidic beverages, use a straw to minimise contact with teeth.
  • Rinse your mouth with water afterwards, and wait at least 30 minutes before brushing to prevent enamel erosion.

3. Protect Against Teeth Grinding (Bruxism)

  • If you grind your teeth at night, consider using a custom-fitted night guard when sleeping.
  • Stress management techniques such as meditation or jaw exercises may help reduce clenching and grinding.

4. Schedule Regular Dental Check-Ups

  • Visit your dentist at least twice a year for check-ups.
  • Routine visits help identify and treat early signs of sensitivity before they worsen.

5. Address Underlying Medical Conditions

  • Certain health conditions, such as acid reflux (GERD), bulimia, or sleep apnea, can impact oral health. If you suspect a medical issue is contributing to tooth sensitivity, consult your doctor for proper management.

MANAGEMENT OR TREATMENT OPTIONS FOR TOOTH SENSITIVITY

If you’re experiencing tooth sensitivity, don’t worry as effective treatments are available! A proper dental evaluation is crucial to determine the cause and best course of action.

1. Preventive Dentistry

  • Fluoride treatments such as fluoride varnish and fluoride gel trays strengthen enamel and reduce sensitivity.
  • Desensitizing toothpaste blocks pain signals from reaching the nerves.
  • Proper brushing technique is imperative to prevent further damage. Your dentist or dental hygienist will give you tailored advice regarding oral hygiene practices or dietary changes.

2. Restorative Treatments

  • Dental fillings for cavities or defective fillings.
  • Crowns, inlays, or onlays to protect damaged teeth.
  • Root canal treatment in severe cases where decay or cracks reach the tooth’s nerve.

3. Managing Teeth Grinding

  • Custom night guards protect teeth from excessive wear due to grinding.
  • In some cases, Botox injections may help relax jaw muscles and reduce bruxism.

4. Gum Treatments

  • Deep gum cleaning helps treat active gum disease and prevent further gum recession.
  • Gum graft surgery may be needed in cases of severe gum recession to cover exposed roots.

5. Orthodontic Treatment

  • If misaligned teeth contribute to sensitivity, braces or aligners may be recommended to correct the bite and prevent unnecessary wear.

6. Underlying Medical Problems

  • Your dentist may also work with your medical doctor if an underlying health condition is contributing to your sensitivity.

WHEN TO SEE A DENTIST

Occasional tooth sensitivity is common, but persistent discomfort should not be ignored. If you are experiencing tooth sensitivity, you should schedule a dental visit if:

  • The sensitivity does not go away or worsens over time.
  • The pain interferes with daily activities, such as eating or drinking.
  • You notice other symptoms, such as gum swelling, bleeding, or visible damage to your teeth.

Early intervention can help prevent more severe dental issues, saving you time and money in the long run.

At Canaan Dental, we are dedicated to preventive dentistry, focusing on early detection and proactive care to maintain your oral health. If you’re experiencing tooth sensitivity, schedule an appointment for a thorough evaluation, and let us help you regain your comfort and ensure your smile remains healthy and pain-free!