Understanding Tooth Sensitivity

Tooth sensitivity is a short, sharp discomfort triggered by hot, cold, sweet or acidic food and drink, or sometimes by cold air. It happens when the protective outer layers of the tooth wear down or gums recede, exposing the softer dentine underneath. Dentine contains thousands of tiny channels that lead to the tooth's nerve, so when it is exposed, everyday triggers can reach the nerve and cause discomfort.

Sensitivity is one of the most common concerns we see at our Canning Vale practice. In most cases it can be managed well once the underlying cause is identified.

Common Causes of Sensitive Teeth

• Enamel wear from brushing too hard, acidic diets or teeth grinding (bruxism)
• Gum recession exposing the root surface, often linked to gum disease
• Tooth decay or worn fillings that allow triggers to reach the inner tooth, which may need a filling
• Cracked or chipped teeth that expose dentine
• Recent dental treatment such as whitening or a new restoration, which usually settles within a few weeks

How We Assess Sensitivity

Because sensitivity can have several causes, an accurate diagnosis matters. During a comprehensive dental examination we check your enamel, gums, existing fillings and bite, and use digital imaging where needed to look for decay or cracks that are not visible to the eye. Identifying the cause lets us recommend the most conservative treatment first.

Treatment Options

Depending on the cause, management may include:

• Desensitising treatments applied in the chair to seal exposed dentine channels
• Fluoride applications to strengthen enamel
• A filling or bonding to cover exposed root surfaces or repair worn areas
• A custom night guard if grinding is wearing your enamel
• Gum treatment where recession or gum disease is the underlying issue
• Adjustments to home care, including a soft-bristled brush, low-abrasion sensitive toothpaste and dietary advice

Professional cleaning also plays a part, as built-up tartar can contribute to gum recession over time.

What You Can Do at Home

Use a soft toothbrush with light pressure, choose a toothpaste formulated for sensitive teeth, and try to limit acidic drinks such as soft drinks, juice and wine. Avoid brushing immediately after acidic food or drink; wait 30 minutes so softened enamel can recover. If discomfort persists for more than a week or two, book an assessment rather than managing it long term with toothpaste alone, as ongoing sensitivity can be a sign of decay or a cracked tooth.

Frequently Asked Questions