A lot of people grind or clench their teeth without ever knowing it, because most of it happens while they are asleep. The first hint is often a worn tooth, a sore jaw, or a partner who has heard it. Here is what grinding does, and how a simple night guard protects the teeth you have.
What bruxism actually is
Bruxism is the medical name for grinding and clenching your teeth. Grinding is the sideways action that wears teeth down. Clenching is the steady squeeze that loads them like a vice. Plenty of people do both, and many do it without any awareness at all.
It comes in two flavours. Awake bruxism tends to be clenching during the day, often while concentrating, driving or under pressure. Sleep bruxism happens at night, outside your control, and is the harder one to catch because you are not there to notice it. The night-time version is usually the more damaging, partly because the forces are higher and partly because it can go on for years unchecked.
It is common, and it is not a character flaw. It is worth taking seriously not because grinding itself is dangerous, but because of what it quietly does to your teeth and jaw over time.
The signs worth noticing
Because sleep grinding is invisible to the person doing it, you tend to spot it by its trail rather than the act. The classic clues are teeth that are becoming flat, short or chipped at the edges, and enamel that is wearing thin enough to show the yellower layer underneath.
Then there are the aches. Waking with a tired or sore jaw, a dull headache around the temples in the morning, or a clicking jaw joint are all common. Some people notice their teeth feel sensitive or a little loose, or that the muscles at the angle of the jaw have become noticeably bulky from overuse.
And there is the giveaway that gets a lot of people through the door: a partner who has heard the grinding in the night. If someone has told you that you sound like you are chewing gravel in your sleep, that is worth acting on.
- 1/Teeth that look flatter, shorter or chipped at the edges.
- 2/A sore or tired jaw in the morning, or headaches around the temples.
- 3/Teeth that feel sensitive, or a jaw that clicks.
- 4/A partner hearing the grinding at night.
Why it damages teeth and crowns
Teeth are built to handle the ordinary forces of chewing, which come and go through the day. Grinding and clenching apply far heavier loads, for much longer, often for hours overnight. Enamel is hard but not indestructible, and under that kind of sustained pressure it wears down, cracks form, and edges chip away.
The damage is not limited to natural teeth. Fillings, crowns, veneers and bridges all take the same battering. A crown that would have lasted many years can fail early under a heavy grinder, and a set of veneers can chip in a way they never would have otherwise. If you have paid for dental work, unmanaged grinding is one of the surest ways to shorten its life.
Left long enough, worn teeth can also change your bite and put strain on the jaw joint. Catching it earlier means protecting what you have rather than rebuilding it later, which is both kinder to your teeth and easier on your wallet.
The stress link, and other triggers
For many people, grinding tracks with stress and anxiety. Busy periods, worry and broken sleep often bring on more clenching, which is why some notice their jaw gets worse during a rough patch at work or home. It is one of the ways tension shows up in the body without asking permission.
Stress is not the only factor. Grinding is also associated with disrupted sleep and, in some cases, sleep apnoea, and it can be nudged along by alcohol, caffeine, smoking and some medications. That is worth knowing because a night guard protects the teeth, but if there is an underlying driver like poor sleep, it can be worth looking at that too.
We are not here to add stress about your stress. The practical point is simply that grinding often has a cause behind it, and managing both the habit and its trigger tends to work better than either alone.
How a custom night guard protects your teeth
A night guard is a slim, custom-made shield that fits over your teeth while you sleep. It does not stop you grinding, but it takes the force instead of your teeth, so the guard wears down over time rather than your enamel and your dental work. It also cushions the jaw muscles a little, which many people find eases the morning ache.
The custom fit is the part that matters. A guard made from an impression of your own teeth sits snugly, stays put through the night, and is comfortable enough to actually wear, which is the whole point. The soft boil-and-bite guards from a pharmacy can be a stopgap, but they are often bulky, fit loosely and get spat out or given up on within a week.
Looking after one is simple. Rinse it after use, brush it gently, keep it in its case away from heat, and bring it along to your check-ups so we can see how it is wearing. A guard that is doing its job will show the marks that would otherwise have been on your teeth.
What to do if this sounds like you
The first step is a look. At a check-up we can see the tell-tale wear patterns, check your jaw and bite, and confirm whether grinding is the cause of what you are noticing. If it is, a custom night guard is usually the sensible protection, and we take an impression to have one made to fit you.
We do not list a set price for a night guard, because it depends on the type that suits you, so you will get a written quote before we start. Because it is a made-to-measure device, it is well worth getting the fit right rather than persevering with something that does not sit properly.
If jaw pain or headaches are part of the picture, we can also talk through simple things that help, from easing daytime clenching to looking at whether stress or sleep is playing a part. Small changes add up, and protecting your teeth while you sort the rest is time well spent.
Quick questions
- How do I know if I grind my teeth in my sleep?
- Common clues are teeth that look flatter or chipped, a sore or tired jaw and morning headaches, sensitive teeth, or a partner who has heard the grinding. At a check-up we can look for the wear patterns and tell you.
- Will a night guard stop me grinding?
- Not exactly. It does not stop the habit, but it takes the force instead of your teeth, so the guard wears rather than your enamel and dental work. Many people also find it eases the morning jaw ache.
- Are pharmacy night guards good enough?
- They can be a short-term stopgap, but the boil-and-bite type is often bulky and loose, so it gets given up on. A guard made from an impression of your own teeth fits snugly and is far easier to wear night after night.
- How much is a custom night guard?
- It depends on the type that suits you, so we do not list a price. You get a written quote before we start, once we have looked at your teeth and taken an impression.
Sources: New Zealand Dental Association, patient guidance on bruxism and occlusal splints · Te Whatu Ora | Health New Zealand, oral health information. This article is general information, not a substitute for an examination and personal advice from a dentist. If you're in pain or unsure, book a visit or call 09 964 0508.
