What causes tooth sensitivity?

Sep 13, 2024 Source: Cainiu Health

Dr. Liu Chao

Introduction

Tooth sensitivity, also known as dentin hypersensitivity, may be caused by aging, improper dietary habits, tooth wear, gum recession, cavities, and other factors. Choose toothpaste containing potassium salts, fluoride, or other anti-sensitivity ingredients, as these components can effectively reduce tooth sensitivity. Using a mouthwash specifically designed for sensitive teeth can further alleviate discomfort.

Generally, tooth sensitivity, also known as dentin hypersensitivity, may be caused by aging, improper dietary habits, tooth wear, gum recession, dental caries, and other factors. If discomfort occurs, seek medical attention promptly. Specific causes are analyzed as follows:

1. Aging

With age, tooth enamel may gradually wear down, exposing the underlying dentin and leading to tooth sensitivity. Using fluoride toothpaste or desensitizing toothpaste—such as sodium fluoride or potassium nitrate toothpaste—can help strengthen enamel and reduce sensitivity.

2. Dietary Habits

Frequent consumption of highly acidic foods or beverages, such as citrus fruits and carbonated drinks, can erode tooth enamel and contribute to tooth sensitivity. Adjusting dietary habits by reducing intake of acidic foods and drinks, and rinsing the mouth after meals, can help prevent this condition.

3. Tooth Wear

Tooth wear is usually caused by long-term teeth grinding, improper brushing techniques, or biting hard objects. When enamel wears away, dentin becomes exposed, increasing sensitivity to external stimuli and causing the symptoms described. Wearing a dental guard at night can help protect teeth and reduce damage from grinding.

4. Gum Recession

Gum recession is commonly caused by periodontal disease, overly aggressive or improper brushing, or misaligned teeth. As gums recede, tooth roots become exposed. Since root surfaces lack protective enamel, they are directly exposed to external stimuli, resulting in tooth sensitivity. Other symptoms may include gum bleeding and loose teeth. Treatment may include medications such as metronidazole tablets, tinidazole tablets, or ornidazole tablets, as prescribed by a dentist.

5. Dental Caries (Cavities)

Dental caries are caused by acid produced by bacterial plaque on the tooth surface, which erodes the enamel. When decay reaches the dentin layer, sensitivity to external stimuli increases, leading to tooth sensitivity. Symptoms may also include visible spots on the teeth and pain. Treatment may involve medications such as colchicine tablets, artificial bezoar and metronidazole capsules, or metronidazole tablets, as directed by a healthcare professional.

Regular dental cleanings at an oral health clinic can remove tartar and plaque, helping maintain overall oral health.

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Is it necessary to extract wisdom teeth?

In general, not all wisdom teeth require extraction; the decision to remove them should be based on a comprehensive assessment of their position, occlusion, and overall oral health. To accurately evaluate whether a wisdom tooth should be retained, it is recommended to visit a reputable dental clinic for radiographic imaging. A dentist will then formulate a professional treatment plan based on the root morphology and eruption direction—do not retain or extract wisdom teeth arbitrarily without professional guidance.

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What causes frequent nausea and dry heaving when brushing teeth in the morning?

In general, frequent nausea and dry heaving during morning toothbrushing may be caused by improper brushing techniques, stomach irritation due to fasting, chronic pharyngitis, reflux esophagitis, allergic rhinitis, or other reasons. If discomfort occurs, it is recommended to seek timely medical evaluation and treatment at a正规 hospital. In daily life, maintain good oral hygiene and replace your toothbrush regularly; eat meals on a regular schedule and avoid overeating.