Things to Know About Teeth Grinding
Bruxism is the clinical name for clenching or grinding your teeth. Most people who do it have no idea they do — it happens during sleep, or unconsciously during the day while concentrating or under stress. The first sign is usually not the grinding itself but what it leaves behind: a dull ache in the jaw on waking, teeth that have become sensitive, or a partner who hears the noise.
It matters because the forces involved are considerable. Chewing food generates far less pressure than a clenched jaw sustained for minutes at a time, and enamel does not grow back.
How to tell whether you grind your teeth
- Jaw ache or headache on waking, often around the temples, easing through the morning.
- Flattened, chipped or shortened teeth — front teeth that look level across the edge.
- Sensitivity to cold as worn enamel exposes the dentine underneath.
- Clicking or tightness in the jaw joint, or difficulty opening wide.
- A ridge along the inside of the cheek, or scalloped indentations along the side of the tongue.
- Repeated failure of fillings or crowns that keep chipping or debonding.
A dentist can usually confirm it in one appointment. Wear facets — polished flat areas where upper and lower teeth meet — are visible long before you notice a problem yourself.
What causes it
There is rarely a single cause. The factors that come up most often are:
- Stress and anxiety, the most commonly reported trigger, particularly for daytime clenching.
- Sleep disorders, especially obstructive sleep apnoea. Night-time bruxism and interrupted breathing during sleep are frequently linked, which is why loud snoring alongside grinding is worth mentioning.
- A bite that does not meet evenly — a high filling or crowded teeth can provoke it.
- Stimulants: caffeine, nicotine, alcohol and certain medications, including some antidepressants.
What untreated grinding does over time
Enamel wears down, and once it is gone the softer dentine beneath wears several times faster, so the damage accelerates. Teeth shorten and the lower third of the face can start to look compressed. Cracks develop and can reach the nerve, turning a cosmetic problem into a root canal. Gums recede at the neck of the tooth, and in long-standing cases the jaw joint itself becomes painful.
Grinding is also the single most common reason cosmetic dental work fails early. If you are considering veneers or whitening, bruxism should be managed first — our guide on how long veneers last explains why.
How bruxism is treated
- A night guard. The first-line treatment nearly everywhere. A custom hard acrylic splint, made from a scan or impression of your teeth, absorbs the load so the guard wears instead of your enamel. It does not stop the grinding; it protects you from it. Over-the-counter boil-and-bite guards are a poor substitute and can make things worse by altering the bite.
- Botulinum toxin to the masseter muscles. Injected into the large closing muscles at the angle of the jaw, it reduces the force those muscles can generate. This is genuinely effective for strong clenchers and for the muscle pain that comes with it. It is not permanent — the effect typically lasts around three to six months and varies between individuals — and it is usually used alongside a guard rather than instead of one. See botox and medical filling.
- Correcting the bite. If an uneven bite is contributing, adjusting a high restoration or straightening crowded teeth with orthodontic treatment may reduce the trigger.
- Restoring worn teeth. Where enamel is already lost, composite or ceramic can rebuild the shape — but only once the grinding is under control, or the new work simply wears too.
- Managing the cause. Reducing caffeine and evening alcohol, and addressing stress or a suspected sleep disorder, does more long-term good than any appliance.
What you can do tonight
Stop caffeine after mid-afternoon. Avoid alcohol close to bedtime — it fragments sleep and increases grinding episodes. Through the day, notice where your teeth are: at rest they should be slightly apart, with lips together. Warmth on the jaw muscles before bed helps the ache. None of this replaces a guard, but it reduces the load while you arrange one.
Frequently Asked Questions
How do I know if I grind my teeth at night?
The usual signs are jaw ache or a headache around the temples on waking, teeth that look flat or chipped along the edges, new sensitivity to cold, a ridge along the inside of the cheek, or restorations that keep chipping. A dentist can confirm it by looking for wear facets, which appear long before most people notice a problem.
Does a night guard stop teeth grinding?
No. A night guard does not stop the grinding itself; it absorbs the force so the appliance wears instead of your enamel, and it usually relieves the muscle ache as well. A custom guard made from a scan of your teeth is far better than an over-the-counter boil-and-bite version, which can alter the bite and make matters worse.
How long does botox for teeth grinding last?
Botulinum toxin injected into the masseter muscles typically lasts around three to six months, though this varies between individuals, and it needs repeating. It reduces the force the closing muscles can generate, which helps strong clenchers and muscle pain, but it is normally used alongside a night guard rather than instead of one.
Can grinding damage veneers or crowns?
Yes, and bruxism is one of the most common reasons cosmetic dental work fails early. Grinding stresses the cement layer and can chip ceramic. Bruxism should be brought under control before veneers or crowns are placed, and a night guard is usually recommended afterwards to protect the investment.