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What is Non-Carious Tooth Surface Loss?


Non-carious tooth surface loss (NCTSL) refers to the gradual wearing away of tooth structure that is not caused by decay (cavities). Instead, it occurs due to mechanical forces, chemical processes, or a combination of both.


This is a common condition seen in both adults and children, and early recognition is important to prevent long-term damage. Guidance from organisations such as Oral Health Victoria, Colgate, and Oral-B emphasises prevention and early management

Attrition (tooth-to-tooth wear)

Attrition is caused by direct contact between teeth, often due to:

    • Teeth grinding or clenching (bruxism)
    • Normal chewing over time

What it looks like:

    • Flattened or worn-down biting surfaces
    • Shortened teeth
    • Shiny wear facets where teeth meet

Common symptoms:

    • Jaw soreness or fatigue
    • Tooth sensitivity (in advanced cases)


Abrasion (external mechanical wear)

Abrasion occurs when teeth are worn away by external forces, most commonly:

    • Brushing too hard or using a hard toothbrush
    • Incorrect brushing technique
    • Overuse of abrasive toothpaste
    • Habits like biting nails or holding objects between teeth

What it looks like:

    • Notches or grooves near the gumline
    • Wedge-shaped defects on teeth


Overbrushing can damage enamel and gums, especially when combined with poor technique.


Erosion (chemical wear)

Erosion is caused by acid dissolving the tooth surface, without bacteria being involved.

Sources of acid include:

    • Frequent consumption of acidic foods/drinks (soft drinks, sports drinks, citrus)
    • Medical conditions such as reflux or vomiting
    • Dry mouth (reduced saliva protection)

What it looks like:

    • Smooth, shiny enamel
    • Thinning or translucent edges of teeth
    • “Cupping” or shallow dents on biting surfaces


Dietary acids are a major contributor to tooth erosion.

Treatment depends on the cause, severity, and symptoms.

Early management (preventive)

    • Identify and remove the cause
    • Modify brushing technique (gentle, soft brush)
    • Reduce acidic food and drink frequency
    • Use fluoride toothpaste to strengthen enamel

Protective treatments

    • Desensitising toothpaste for sensitivity
    • Fluoride applications to strengthen enamel
    • Night splints (mouthguards) for grinding

Restorative treatment (if advanced)

    • Tooth-coloured fillings
    • Bonding or veneers
    • Crowns in severe cases

Your dentist will tailor treatment to your specific situation.

Prevention focuses on reducing both mechanical and chemical damage:

Brushing habits

    • Use a soft-bristled toothbrush
    • Brush gently (avoid scrubbing)
    • Wait 30–60 minutes after acidic foods before brushing

Diet tips

    • Limit frequent intake of acidic drinks (e.g., soft drinks, energy drinks)
    • Drink water after acidic foods
    • Use a straw to reduce acid contact

Lifestyle factors

    • Manage teeth grinding (consider a night guard)
    • Stay hydrated to support saliva flow
    • Address reflux or medical conditions with your GP


The frequency of acid exposure is more harmful than quantity.

Non-carious tooth surface loss is a common but preventable condition. Understanding the difference between attrition, abrasion, and erosion helps identify the cause and guide treatment. With the right habits and early intervention, you can protect your teeth and maintain long-term oral health.

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