What Causes Tooth Sensitivity — and How Your Calgary Dentist Can Help

Why Are My Teeth Suddenly Sensitive?

Tooth sensitivity occurs when the protective layers of your teeth — the enamel on the crown or the cementum on the root — wear away, exposing the softer, porous dentine underneath. Dentine contains thousands of microscopic fluid-filled channels called dentinal tubules that lead directly to the tooth’s nerve, so when heat, cold, sweetness, or pressure reaches them, you feel a sharp, sudden twinge of pain. The good news is that tooth sensitivity is one of the most treatable dental concerns, and a licensed Calgary dentist can identify the exact cause and tailor a solution that works for you.

Common Causes of Tooth Sensitivity

Understanding what’s triggering your discomfort is the first step toward lasting relief. Sensitivity is rarely random — it almost always has a specific, identifiable source.

Enamel Erosion

Enamel is the hardest substance in the human body, but it isn’t indestructible. Frequent consumption of acidic foods and drinks — citrus fruits, soft drinks, vinegar-based dressings — gradually dissolves enamel over time. Once enamel is lost, it cannot regenerate, which is why early intervention matters so much.

Gum Recession

When gum tissue pulls back from the tooth, it exposes the root surface, which is covered by cementum rather than enamel. Cementum is far thinner and less protective, leaving the dentinal tubules close to the surface and vulnerable to temperature changes. Gum recession can result from periodontal (gum) disease, aggressive tooth brushing, or simply ageing.

Tooth Grinding (Bruxism)

Many Calgarians grind or clench their teeth at night without realising it — a condition called bruxism. Over months and years, this constant pressure wears down the biting surfaces and erodes enamel, creating widespread sensitivity across multiple teeth at once.

Cracked Teeth and Worn Fillings

A hairline fracture in a tooth or a deteriorating filling can open a direct pathway to the nerve. Sensitivity triggered by biting down on a specific tooth is a classic sign that a crack or failing restoration may be the culprit.

Recent Dental Procedures

It’s perfectly normal to experience mild sensitivity for a few days after a professional cleaning, tooth whitening, or a new filling. This type of sensitivity is temporary and typically resolves on its own within one to two weeks.

Tooth Decay and Cavities

A cavity essentially eats through enamel and into dentine, creating exactly the kind of exposure that causes sensitivity. If a particular tooth is consistently sensitive to sweets or cold, decay should always be ruled out with a dental examination and X-rays.

How Your Calgary Dentist Can Treat Tooth Sensitivity

The right treatment depends entirely on the underlying cause, which is why a professional diagnosis is essential before reaching for a desensitising toothpaste and hoping for the best. Common clinical treatments include:

• Fluoride varnish or gel — applied directly to the tooth surface to strengthen enamel and block dentinal tubules
• Dental bonding — a tooth-coloured resin that seals exposed root surfaces or repairs small chips and cracks
• Gum grafting — a surgical procedure to cover exposed roots when recession is significant
• Custom night guards — a protective oral appliance worn during sleep to prevent bruxism-related enamel loss
• Crowns or inlays — for teeth where decay or damage has compromised the tooth structure substantially
• Root canal therapy — recommended only when sensitivity is caused by deep infection or irreversible nerve damage

At home, your dentist may also recommend switching to a soft-bristled toothbrush, using a toothpaste formulated with potassium nitrate or stannous fluoride, and reducing your intake of acidic foods and drinks.

When Should You See a Dentist About Sensitive Teeth?

You should book an appointment if your sensitivity is sharp, lingers for more than a few seconds, is getting progressively worse, or is isolated to a single tooth. These patterns suggest something beyond surface-level enamel wear and warrant a proper clinical evaluation. Leaving the cause untreated can allow minor issues — a small cavity, early gum disease — to develop into far more involved dental problems.

Get Relief at For Your Smile Dental in Calgary Crowfoot NW

You don’t have to wince every time you sip your morning coffee or bite into an ice cream cone. The team at For Your Smile Dental, located at Crowfoot Centre NW in Calgary, is here to find the root cause of your sensitivity and create a personalised treatment plan so you can eat, drink, and smile comfortably again. We welcome walk-in appointments and offer 0% financing to make your care as accessible as possible. Call us at 587-330-3000 or book your appointment online at fysmiledental.com — relief is closer than you think.