Teeth grinding, known clinically as bruxism, usually happens during sleep, which is why most people have no idea they do it. The damage is gradual and permanent: enamel does not grow back. The good news is that grinding is straightforward to spot once you know the signs, and a properly fitted night guard protects your teeth from most of the harm.
How to tell if you grind your teeth
Because it happens while you are asleep, the evidence tends to show up in the morning or at your check-up rather than in the act itself. Common signs include:
A dull headache around the temples on waking
Aching jaw muscles, or a jaw that feels tired after breakfast
Teeth that look flattened, shortened, or unusually even across the biting edges
Increased sensitivity to cold as enamel thins
Small chips along the edges of the front teeth
A partner who has heard the grinding — it can be surprisingly loud
Ridges along the inside of your cheeks, or scalloped edges on the tongue
Dentists often notice bruxism before patients do, because the wear pattern is distinctive. Teeth that have been ground down share a flat, polished look that does not occur through normal eating.
Why it happens
Bruxism rarely has a single cause. Stress and anxiety are the most commonly recognised triggers, and many people notice their grinding worsens during difficult periods at work or home. Sleep-related breathing problems, including snoring and sleep apnoea, are also strongly associated with night-time grinding. Alcohol, caffeine, smoking and some medications can each make it more likely, and a bite that does not meet evenly can contribute.
Daytime clenching is a slightly different habit and is often linked to concentration rather than sleep. People clench while driving, working at a screen, or lifting something heavy, usually without noticing.
What grinding actually costs you
Enamel is the hardest substance in the body, but it is finite. Once it is worn through, the softer dentine underneath wears far more quickly, which is why damage tends to accelerate. Teeth become shorter, more sensitive, and more prone to chipping. In advanced cases the front teeth lose enough height to change the appearance of the smile, and rebuilding them becomes a significant piece of restorative work.
Grinding also puts strain on existing dental work. Crowns, veneers and composite bonding all have a harder life in a mouth that grinds, and they fail sooner. If you have invested in cosmetic work, protecting it is a practical decision as much as a clinical one.
How a night guard helps
A night guard is a custom-made appliance, usually worn on the upper teeth, that separates the biting surfaces so your teeth meet plastic instead of each other. It does not stop you grinding. What it does is absorb the forces and take the wear itself, which is exactly the point: the guard is far cheaper and easier to replace than your enamel.
Many people also find their morning headaches and jaw ache improve, because the guard changes how the jaw muscles work overnight. It is made from impressions or a scan of your teeth, so it fits closely and stays put.
Why a custom guard beats a boil-and-bite one
Shop-bought guards are cheap and available immediately, and for some people they are better than nothing. But they are bulky, which makes them harder to tolerate all night, and a poor fit can allow teeth to shift over months of use. They also tend to be made of softer material, which some people simply chew through.
A custom guard is made to your bite, thinner where it can be and thicker where it needs to be. It is more comfortable, lasts considerably longer, and does not move teeth out of position. Given that a guard is worn for several hours every night, comfort is what determines whether it actually gets used.
What else helps
A guard protects your teeth, but it is worth addressing the causes alongside it:
Cut back on caffeine and alcohol in the evening, both of which worsen night-time grinding
Build a wind-down routine before bed rather than working or scrolling right up to sleep
Notice daytime clenching and consciously rest the jaw with teeth apart and lips together
Raise persistent snoring or daytime tiredness with your GP, as sleep apnoea is treatable
Ask about your bite if teeth do not meet evenly
Getting assessed
Bruxism is usually picked up during a routine examination, so if you are due a check-up that is the natural place to start. We look at the wear pattern, check your jaw joints and muscles, and discuss what is likely to be driving it. If a night guard is appropriate we take impressions and fit it once made. You can read more about what a routine visit involves in our guide to how often you should see a dentist, or see our general dentistry services. To arrange an assessment at our Burton Joyce practice, call 0115 931 2935.
FAQ
Q: How do I know if I grind my teeth at night? A: Common signs are waking with jaw ache or headaches around the temples, flattened or chipped tooth edges, and increased sensitivity to cold. A dentist can often identify the characteristic wear pattern before you notice symptoms.
Q: Does a night guard stop teeth grinding? A: No. It does not stop the grinding itself, but it separates the teeth so the guard absorbs the wear instead of your enamel, and it often eases morning jaw ache and headaches.
Q: Are shop-bought night guards any good? A: They are better than nothing but tend to be bulky, wear through faster, and can allow teeth to shift if they fit poorly. A custom guard is thinner, more comfortable and lasts longer, which matters when it is worn nightly.
Q: Can worn-down teeth be repaired? A: Yes. Worn teeth can be rebuilt with composite bonding, crowns or veneers depending on how much tooth structure is left. Protecting the teeth with a guard first stops the problem repeating.
Q: Is teeth grinding caused by stress? A: Stress is a common trigger, but not the only one. Sleep-related breathing problems, alcohol, caffeine, smoking, some medications and an uneven bite can all contribute.