Sensitive teeth are one of the most common ailments in the adult population. According to Odontoiatria33 , over 30% of Italian patients—with a higher incidence between the ages of 20 and 50—suffer from some form of dentin hypersensitivity : a condition that manifests itself with acute, transient pain in response to thermal, chemical, or mechanical stimuli.
As Il Dentista Moderno (2024) emphasizes, tooth sensitivity should not be considered a simple annoyance, but a clinical sign of alteration in the tooth's protective structures. Understanding the causes and taking targeted action is essential to prevent complications such as root caries, gingivitis, or cervical lesions.
What is tooth sensitivity?
According to the Italian Journal of Dentistry (2023), tooth sensitivity (or dentin hypersensitivity) is defined as “a brief and intense painful sensation that occurs following external stimuli on vital teeth”.
Pain occurs when the dentin , the layer beneath the enamel, is exposed and external stimuli reach the nerve endings in the dentinal tubules. The most common stimuli are temperature changes, acidic or sweet foods, and the pressure exerted by brushing.
The condition may involve a single tooth or multiple teeth and is often associated with gum recession or enamel wear .
Main causes
1. Enamel erosion and wear
Enamel erosion is one of the most common causes. It can be caused by endogenous acids (such as gastroesophageal reflux) or exogenous acids (acidic beverages, wine, coffee, juices, energy drinks). The chemical action of these substances progressively weakens the enamel and makes the underlying dentin vulnerable. Improper toothbrushing—horizontal movements or excessively hard bristles—can also cause mechanical abrasion and exacerbate the problem.
2. Gum recession
Gum recession exposes the tooth root, which is not protected by enamel. According to Odontoiatria33 , the main causes include aggressive brushing, periodontal disease, and natural tissue aging. Exposure of the tooth neck increases sensitivity to temperature changes and tactile stimuli.
3. Bruxism and microtraumas
Bruxism , or teeth grinding, is a mechanical wear factor. Recent studies confirm that chronic friction reduces enamel thickness and amplifies the painful response. In these cases, the use of a customized night guard to protect the dental arches is recommended.
4. Dental treatments
After a professional cleaning or whitening , it's common to experience temporary sensitivity. However, it's important to know that this condition is reversible and results from the temporary removal of the protective film covering the enamel. The discomfort can be reduced with the use of remineralizing toothpastes and fluoride-based mouthwashes.
5. Cavities and fractures
The presence of cavities or microfractures can leave the dentin exposed and allow stimuli to reach the pulp. In these cases, sensitivity is a sign of structural damage and requires immediate diagnosis by your dentist.
Remedies and treatments
As reported by Il Dentista Moderno and Odontoiatria33 , the management of dentin hypersensitivity always depends on the origin of the problem. Treatments can be home-based or professional .
Home remedies
- Use desensitizing toothpastes containing fluoride, potassium nitrate, or arginine.
- Brush your teeth with gentle strokes and soft bristles.
- Avoid acidic or sugary foods and drinks that promote demineralization.
- Periodically apply fluoride mousse or gel to strengthen the enamel.
Professional treatments
- Applications of topical fluoride or desensitizing resins to seal the dentinal tubules.
- Fillings or conservative restorations in cases of erosion or caries.
- Gum grafts to cover exposed roots and protect sensitive areas.
- Laser therapy (Nd:YAG or diodes) to promote the closure of the dentinal tubules and reduce the painful response.
A combined approach—home hygiene, topical treatment, and regular follow-up—is the most effective strategy for long-term sensitivity control.
Prevention
Prevention remains the surest way to maintain healthy, strong teeth. There are some guidelines that should be followed for optimal results:
- Brush your teeth twice a day using gentle techniques.
- Use dental floss or interdental brushes daily.
- Limit consumption of acidic foods and drinks (wine, citrus fruits, juices, energy drinks).
- Have dental checkups every 6-12 months.
A balanced diet, low in simple sugars and rich in calcium and phosphorus, helps strengthen the enamel and reduce the risk of erosion.
FAQ – Frequently Asked Questions About Sensitive Teeth
Why do teeth hurt when it's cold?
Because thermal stimuli penetrate through the exposed dentinal tubules and reach the nerve endings, generating acute pain.
How long does sensitivity last after whitening?
Usually within a few days. This is a temporary condition that improves with the use of fluoride toothpastes and soft-bristled toothbrushes.
What is the best toothpaste for sensitive teeth?
Products formulated with potassium nitrate, sodium fluoride and arginine create a protective barrier on the dentin and reduce the transmission of painful stimuli.
Does tooth sensitivity get worse with age?
Yes. Thinning enamel and physiological gingival recession increase the risk of hypersensitivity after age 40.
When should you see a dentist?
If sensitivity lasts more than a week or worsens over time, it could be a sign of tooth decay, fractures, or early periodontitis.
Sources
- Infodent (2024) – “Dentinal hypersensitivity: diagnosis and clinical treatment
- Odontoiatria33 (2024) – “Prevention and management of sensitive teeth”
- The Modern Dentist (2023–2024) – “Remedies and Conservative Techniques for Dentin Hypersensitivity”
- Italian Journal of Dentistry (2023) – “Management of dentinal hypersensitivity: clinical overview”
