Tooth Abrasion and Wear Near the Gumline
Some patients notice a small notch, groove, or worn area where the tooth meets the gum. It may feel rough to the tongue, cause sensitivity to cold or brushing, or simply look different from the rest of the tooth surface. These changes are common and often go unaddressed for years. Understanding the cause helps determine whether treatment is needed and how to prevent further progression.
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What is tooth abrasion?
Tooth abrasion is the loss of tooth structure caused by mechanical forces other than chewing. The most common site is at the cervical area of the tooth, the narrow region where the crown meets the root near the gumline. This area is particularly vulnerable because the enamel is thinnest here and the root surface just below has no enamel protection at all.
Abrasion
Abrasion refers to wear caused by contact with an external object, most commonly a toothbrush. Aggressive brushing technique or a hard-bristle brush removes small amounts of tooth structure over time, creating a smooth, shallow groove at the gumline. It tends to affect the outer surfaces of the teeth most prominently.
Abfraction
Abfraction lesions are associated with repeated loading forces from clenching and grinding at the narrow region near the gumline. These forces may contribute to small amounts of enamel and dentine loss over time, creating a notch or wedge-shaped appearance. Unlike abrasion, abfraction lesions tend to have sharper edges and are more closely associated with teeth grinding and clenching.
Erosion
Erosion is tooth loss caused by acid rather than mechanical force. Frequent consumption of acidic foods and drinks, acid reflux, or frequent vomiting can dissolve the enamel surface over time. Erosion tends to affect broader areas of the tooth rather than localised notches, and the surface often has a smooth, concave appearance.
In practice, most patients have a combination of more than one of these processes contributing to the wear they are experiencing.
What causes notches and wear near the gumline?
Several factors can contribute to wear at the gumline, and more than one is often present at the same time.
Aggressive brushing technique
Brushing with too much force, using a hard-bristle toothbrush, or scrubbing horizontally across the teeth wears away the tooth surface at the gumline over time. Many patients are unaware of how hard they brush until the effects become visible.
Teeth grinding and clenching
Clenching and grinding places repeated lateral and compressive forces on the teeth. These forces concentrate at the cervical region of the tooth and can cause the notching associated with abfraction lesions. Many patients who develop these lesions grind at night without realising it.
Acidic diet or acid reflux
Frequent consumption of acidic drinks such as citrus juices, soft drinks, or sports drinks softens the enamel surface and makes it more susceptible to wear from brushing. Acid reflux can have the same effect if the acid reaches the teeth regularly.
Gum recession
When the gum pulls away from the tooth, the root surface becomes exposed. Root cementum is softer than enamel and wears more easily. Recession and abrasion often occur together, with the exposed root surface particularly vulnerable to further wear.
Signs of tooth abrasion or abfraction
These lesions often develop gradually and may go unnoticed for some time. The following are the most common signs.
A notch or groove at the gumline
The most visible sign. A wedge-shaped or rounded notch at the point where the tooth meets the gum, visible when looking at the tooth from the front. Some patients notice it when running their tongue across the area. Others describe it as a small dent or hole near the gumline rather than a notch.
Sensitivity at the gumline
Exposed dentine at the cervical area is sensitive to cold, sweet, air, and sometimes brushing. Sensitivity that is localised to the neck of a specific tooth rather than generalised is a common sign of abrasion or abfraction.
The area feels rough or catches the tongue
A rough or irregular surface at the gumline that the tongue returns to repeatedly is often the first thing patients notice before any visible change is apparent.
The tooth looks different near the gum
Wear at the gumline can cause the tooth to look slightly different in colour or texture near the gum compared to the rest of the tooth surface. The worn area may appear yellower as the dentine becomes more visible through the thinning enamel.
How is tooth abrasion treated?
Treatment depends on the size of the lesion, whether it is causing symptoms, and whether it is progressing. The first step is always to identify and address the contributing cause.
Addressing the cause
If aggressive brushing is contributing, technique and equipment are discussed and adjusted. If grinding or clenching is a factor, a nightguard may be recommended to help reduce loading forces on the affected teeth. Without addressing the cause, any restoration placed is at risk of further wear or failure over time.
Composite restoration
For lesions that are causing sensitivity, are visibly noticeable, or are at risk of progressing further, a small composite restoration can be placed to seal the exposed area. The composite is bonded to the tooth surface and shaped to restore the natural contour of the tooth at the gumline. This reduces sensitivity, protects the exposed dentine or root surface from further wear, and improves the appearance of the area.
Desensitising treatment and fluoride
For smaller lesions that are not yet causing significant symptoms, desensitising agents or fluoride application can help manage sensitivity and strengthen the exposed surface without the need for a restoration.
Monitoring
Small stable lesions that are not causing symptoms and show no sign of progression can often be monitored at regular checkups. Photographs are useful for tracking any change over time.
Tooth wear assessments at Penn Pacific Dental Center
Dr. Chrissie Lam
Dr. Chrissie Lam has a particular interest in restorative treatment and frequently sees patients for assessments involving tooth wear, abrasion lesions, and cervical restorations. She examines the affected area carefully, discusses the contributing factors, and explains the options before any treatment is planned.
Dr. Chrissie Lam trained at the University of the Pacific, Arthur A. Dugoni School of Dentistry in San Francisco and holds an undergraduate degree from UC Berkeley. She has been based in Singapore since 2013.
Common questions about tooth abrasion and wear near the gumline
What is the difference between abrasion and abfraction?
Abrasion is wear caused by an external mechanical force, most commonly aggressive brushing, producing smooth rounded lesions. Abfraction lesions are associated with repeated loading forces from clenching and grinding, producing sharper wedge-shaped notches at the gumline. In practice both can occur together and the distinction matters mainly for identifying contributing factors.
Can a notch at the gumline get worse over time?
Yes. If the contributing factors such as brushing technique or grinding are not addressed, the lesion can deepen over time. A lesion that is small and asymptomatic today may eventually require a larger restoration or cause more significant sensitivity if left unmanaged. Addressing the cause early keeps treatment simpler.
Does a composite restoration at the gumline last?
Composite restorations at the gumline can last well when the contributing cause has been addressed. If grinding continues without a nightguard, or if brushing technique has not changed, the restoration is at greater risk of debonding or wearing down. Managing the cause is as important as placing the restoration.
Is the notch near my gumline causing the sensitivity I feel?
It may be contributing. Exposed dentine at the cervical area is sensitive to cold, sweet, air, and brushing. A composite restoration that seals the exposed dentine can help reduce sensitivity in that area. An assessment helps confirm whether the lesion is the primary source of sensitivity or whether other factors are also contributing.
Do I need a nightguard if I have abfraction lesions?
If grinding or clenching is identified as a contributing factor, a nightguard is usually recommended alongside any restorative treatment. Without protecting the teeth from continued clenching forces, new lesions can develop and existing restorations are at greater risk of failure over time.
Is Penn Pacific Dental Center near Tanjong Pagar MRT?
Yes. The clinic is at 160 Robinson Road, #05-14 SBF Center, a short walk from Tanjong Pagar MRT (East-West Line). It is also accessible from Shenton Way MRT (Thomson-East Coast Line) and Telok Ayer MRT (Downtown Line).
Book a tooth wear assessment at Penn Pacific Dental Center
If you have noticed a notch, groove, or worn area near your gumline, an assessment can identify the cause and determine the most appropriate way to manage it. Penn Pacific Dental Center is at 160 Robinson Road, near Tanjong Pagar MRT. First-time patients are welcome.
Or call us: +65 6904 8482