Teeth Grinding and Clenching
Teeth grinding and clenching places repeated forces on teeth over time. Some patients notice jaw tightness or muscle fatigue on waking. Others become aware only when signs of wear, sensitivity, fractures, or notching near the gumline appear. Often the grinding happens at night without the patient realising it at all.
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Signs that may suggest teeth grinding or clenching
Because grinding often happens during sleep, many patients are unaware of it until the effects become visible or start causing symptoms. These are the most common signs that grinding or clenching may be contributing to dental problems.
Flattened or worn teeth
The biting edges of the front teeth and the biting surfaces of the back teeth gradually wear flat over time. Patients often notice their teeth looking shorter or the edges becoming chipped or uneven. This is one of the most visible signs of long-term grinding.
Chipped or cracked teeth
The repeated loading forces from clenching can cause teeth to chip or develop fine cracks over time. A cracked tooth that causes pain when biting or releasing pressure may have been weakened by years of grinding before the crack became symptomatic.
Sensitivity
As the enamel on the biting surfaces wears thin, the dentine underneath becomes exposed. This causes sensitivity to cold, sweet, or sometimes heat. Sensitivity that is generalised across multiple teeth and worse in the morning is a pattern commonly associated with grinding.
Notches or grooves near the gumline
Some patients develop small notches or grooves at the point where the tooth meets the gum. These are sometimes associated with repeated loading forces from clenching and grinding, although other factors such as tooth brushing habits and acidic wear can also contribute. They can cause sensitivity and may benefit from a small composite restoration to seal the exposed area.
Broken or repeatedly failing fillings and crowns
Patients who grind may find that fillings chip or break more frequently, or that crowns wear down faster than expected. If a filling or crown keeps failing without an obvious cause, grinding is worth considering as a contributing factor.
Jaw tightness or soreness on waking
Mild jaw tightness, muscle fatigue, or soreness on waking commonly occurs with nighttime clenching. A nightguard can help reduce the loading forces on the teeth and may reduce muscle fatigue in some patients. Persistent or severe jaw symptoms may require additional assessment.
What can happen to teeth over time from grinding
The damage from grinding accumulates gradually. Many patients are unaware of the extent of wear until it is pointed out at a dental examination. The longer grinding continues unmanaged, the more complex the eventual treatment becomes.
Progressive enamel loss
Enamel does not grow back. Once it is worn away, the tooth structure is permanently reduced. As enamel thins, sensitivity increases and the risk of fracture rises. A nightguard helps protect the remaining enamel from further wear.
Increased fracture risk
Teeth that have been ground heavily over many years are at significantly higher risk of fracturing under normal biting forces. A tooth that might have taken a hard bite without problem becomes vulnerable once the enamel and overall structure has been weakened. Fractures in heavily worn teeth can sometimes extend to the point where the tooth cannot be saved.
Faster wear on restorations
Composite fillings, crowns, and other restorations wear faster under the forces of grinding than under normal biting. Patients who grind without protection may find restorations need replacing sooner than expected. A nightguard reduces the load on both natural teeth and restorations.
Grooves and wear near the gumline
Notches or grooves near the gumline can deepen over time and may become more sensitive. These areas are sometimes associated with repeated loading forces from clenching and grinding, although other factors can also contribute. Protecting the teeth from continued clenching forces and restoring the notch with composite can help stabilise the area.
What does an assessment for teeth grinding involve?
The assessment focuses on understanding the extent of wear, identifying which teeth are most affected, and determining the most appropriate way to protect and if necessary restore them.
Wear pattern assessment
The pattern of wear across the teeth gives useful information about the type and severity of grinding. Front teeth worn flat, back teeth with flattened cusps, and abfraction lesions at the gumline each tell a slightly different story about how forces are being distributed.
Examination of existing restorations
Existing fillings and crowns are checked for wear, chipping, or signs of repeated stress. Restorations that have failed or worn down significantly may need to be replaced, and protecting them with a nightguard is often discussed at the same time.
Discussion of habits and symptoms
Patients are asked about jaw tightness, morning soreness, stress levels, and sleep patterns, all of which can contribute to the pattern of grinding. Understanding the context helps determine the most appropriate management approach.
How is teeth grinding commonly managed?
The primary goal of managing grinding is to protect the teeth from further damage and to restore any areas that have already been affected. The approach depends on the extent of wear and the patient's specific situation.
Nightguard
A nightguard is a custom-fitted appliance worn over the teeth during sleep. It absorbs and distributes the forces of grinding, protecting the tooth surfaces and restorations from further wear. It does not stop the grinding habit itself, but it significantly reduces the damage caused by it. A nightguard is made from impressions of your teeth and fitted at a follow-up appointment.
Restoring worn or damaged areas
Teeth that have already been worn, chipped, or developed abfraction lesions can be restored with composite or crowns depending on the extent of the damage. Restoring the tooth to its proper shape also helps redistribute biting forces more evenly. A nightguard is usually recommended alongside any restorative work to protect the new restorations.
Monitoring
For patients with mild wear that is not yet causing symptoms, monitoring at regular checkups may be the most appropriate approach. Photographs and study models can be taken to track changes over time and identify if wear is progressing.
Restorative and teeth grinding assessments at Penn Pacific Dental Center
Dr. Chrissie Lam
Dr. Chrissie Lam frequently sees patients with tooth wear, grinding-related damage, sensitivity, and existing restorations. Assessments may include identifying wear patterns, discussing contributing factors, and reviewing options such as nightguards or restoration of worn areas where appropriate. She assesses each situation carefully before recommending any treatment and explains the options clearly before anything is decided.
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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.
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Common questions about teeth grinding
How do I know if I grind my teeth at night?
Many patients are unaware they grind because it happens during sleep. Common signs include jaw tightness or soreness on waking, sensitive teeth that are worse in the morning, flattened or chipped tooth edges, and partners reporting grinding sounds during sleep. A dental examination can identify the wear patterns that suggest grinding.
Can teeth grinding be stopped?
Grinding often occurs during sleep and may be influenced by stress, sleep patterns, and other factors. While the habit itself is not always completely eliminated, the damage it causes to teeth can be significantly reduced with appropriate protection.
What is a nightguard and how is it made?
A nightguard is a custom-fitted appliance made from impressions of your teeth. It fits over either the upper or lower teeth and is worn during sleep. It absorbs grinding forces and prevents tooth surfaces from making direct contact. It typically takes two appointments — one for impressions and one for fitting and adjustment.
Will a nightguard stop my jaw from being sore?
A nightguard protects the teeth from grinding forces and may also reduce jaw muscle fatigue or soreness associated with clenching in some patients. Jaw symptoms can have multiple contributing factors, so persistent symptoms do not always resolve with a nightguard alone.
What are the notches near my gumline?
Small notches or grooves at the point where the tooth meets the gum are called abfraction lesions. They are thought to result from the flexing forces that clenching places on the tooth at its narrowest point. They can cause sensitivity and may deepen over time if clenching continues. A small composite restoration can seal the area and reduce sensitivity, and a nightguard helps prevent further progression.
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 signs of wear, sensitivity, or repeated chipping, an assessment can help identify whether grinding is contributing and what can be done to protect your teeth. Penn Pacific Dental Center is at 160 Robinson Road, near Tanjong Pagar MRT. First-time patients are welcome.
Or call us: +65 6904 8482