Tooth Wear

Why do teeth wear down, and does wear reverse?

Wear comes from three different causes, and which one it is decides the treatment

If your teeth look shorter than they used to, or you have noticed a thin, translucent look at the edges, this is a sign of wear. Wear does not come from a single cause: grinding at night, contact with stomach acid, or brushing too hard leave different marks on different surfaces. Enamel that has been lost does not come back on its own, but once the cause is found and stopped, the process stops progressing, and the lost part can be rebuilt when needed. In advanced cases, the loss of bite height also changes the appearance of the lower half of the face. Below you will find the three types of wear, why bite height matters, and what is done at each stage.

Short answer

Teeth wear down through three separate mechanisms: grinding and clenching at night, acid erosion from reflux or acidic drinks, and excessive friction from brushing too hard. Enamel that has been lost does not come back on its own; minerals can be supported at an early stage, but enamel that has fully disappeared does not regrow. In advanced wear, your bite height, the gap between the upper and lower jaw when closed, decreases, which can make the lower half of your face look shorter. At this stage, treatment can range from a night guard to rebuilding your bite height.

Three types of wear: Grinding and clenching, acid erosion, over-brushing
Lost enamel: Does not come back on its own
First step: Find the cause, then protect
In advanced wear: Bite height is rebuilt

Why teeth wear down

Tooth wear is not a single condition but the shared result of three different mechanisms: tooth rubbing against tooth, acid dissolving enamel, and a mechanical surface abrading enamel away. All three lead to the same result, teeth that become shorter and thinner, but their causes and treatments differ from each other. The right treatment starts with finding which mechanism, sometimes more than one, is at work.

The first mechanism is tooth-on-tooth friction, most commonly caused by grinding and clenching at night. This movement happens unconsciously during sleep and applies a force far higher than you could manage while awake. Its signs are morning jaw fatigue, headaches and flattened chewing surfaces. Stress, sleep patterns and some medicines can trigger this pattern. A grinding habit that goes unnoticed for a long time can build up fatigue and pain not only in your teeth but also in your jaw joint and the muscles around it.

The second mechanism is acid erosion, and its source can be from outside or inside your mouth. Reflux, where stomach acid reaches the mouth from the food pipe, causes a characteristic pattern of wear especially on the inner surfaces of the back teeth. Acidic drinks and citrus fruit have more effect on the front teeth and outer surfaces. A tooth worn by erosion usually becomes translucent at the edges and develops a dished-out surface.

The third mechanism is abrasion, caused by an outside mechanical force such as a hard-bristled brush, brushing too hard, or a habit like nail biting. Its characteristic mark is V-shaped notches near the gum line, on the body of the tooth. Abrasion is often seen together with gum recession, because the same hard-brushing habit causes both.

As wear progresses, your bite height, that is, the distance between your upper and lower jaw when they close, decreases. This height affects not only chewing but also the appearance of the lower half of your face; your lips can sit further inward, the lines around your mouth can deepen, and your chin can look more prominent. Because this change happens slowly, patients usually notice the difference in their face before the shortening of their teeth. Some patients, thinking they look more tired or older in the mirror or in photos, only learn at an examination that the real source is the loss in their teeth.

In the early stage of wear, the loss is only at the mineral level, that is, microscopic; at this stage, balance can be restored with saliva, fluoride and the right care. But once the enamel surface has been physically worn away and lost, this loss is permanent; the tooth does not return to its previous length on its own. This is why early and advanced wear do not call for the same conversation.

The causes can also occur together rather than alone; for example, in a patient with both reflux and night-time clenching, wear progresses much faster, because enamel softened by acid is less able to withstand clenching force. Once wear has progressed this far and your bite height has noticeably decreased, it may need to be managed not with individual fillings or crowns but by rebuilding the bite of the whole mouth together.

Does this description of tooth wear match you?

The list below separates whether the wear mechanisms we describe match your situation, or whether something else needs investigating.

The tooth can be saved

You wake up with jaw pain or a headacheThis is a typical sign of grinding or clenching at night. If your partner or roommate says they hear sounds while you sleep, this makes it more likely.
You have a reflux diagnosis, or you drink a lot of acidic drinksAcid erosion is an expected result in this group. Dental treatment done without bringing reflux under control leads to the same wear happening again.
You use a hard-bristled brush, or you brush hardNotches near the gum line are usually a mark of this habit. A filling placed without changing your brush and technique wears down again in the same place.
Your teeth have become shorter, and you have noticed translucency at the edgesThis is a visible sign that wear has progressed; which mechanism is dominant becomes clear at an examination.

Saving it is unlikely to hold

The wear is in a single tooth and sharp-edgedThis is more likely a sign of a fracture, different from widespread wear, and needs separate assessment.
The pain is sudden and severeWear usually causes a slowly progressing sensitivity; sudden, severe pain suggests another cause, such as decay or an abscess.
The wear is on baby teethWear is assessed differently in children; ask your child's dentist.
The wear has looked the same for years and you have only just noticed itWear that is stable and not progressing is not urgent; it is still worth having a dentist look at it at a check-up.

How the cause is found

The sequence below shows what should be discussed and checked at an examination.

1
History
You are asked about a history of grinding at night, a reflux diagnosis, your diet, and your brushing technique and brush type. This information largely reveals which mechanism is dominant.
2
Examining the pattern of wear
Which teeth, which surfaces and in what shape the wear appears is assessed by direct examination. Wear on the inner surfaces of the back teeth suggests reflux, notches at the gum line suggest abrasion, and flattened chewing surfaces suggest grinding; but the three mechanisms are often seen together in the same mouth, and the examination makes the precise distinction.
3
Measuring bite height
The distance between your upper and lower jaw when closed is assessed; this determines how far the wear has progressed and the scope of treatment.
4
Referral if needed
If reflux is strongly suspected, a referral to gastroenterology may follow; if grinding (bruxism) is the main issue, a sleep assessment may come up if needed. Dentistry is the starting point here.
5
Starting protection
Whatever the cause, a night guard, correcting your brushing technique, or a change in diet is the first step to stop the wear progressing.
6
Restorative planning in advanced cases
If your bite height has noticeably decreased, how and in what order the lost part will be rebuilt is planned separately. This planning does not start from a single tooth but from how your upper and lower jaw close together; a crown placed on a single tooth without assessing your bite pattern can break down again quickly.

Treatment steps

The steps vary with the cause and degree of wear; the order runs from the least invasive to the most extensive.

Night guard

In wear caused by grinding and clenching, a barrier placed between your teeth directs the force onto the guard instead of from tooth to tooth. It is the most effective first step in stopping wear.

Managing reflux and diet

In acid erosion, treating the source is essential; reflux treatment is managed with your doctor, and acidic drink and citrus fruit intake is reduced by reviewing how often and when you have them.

Correcting your brushing technique

In abrasion, switching to a soft-bristled brush and reducing pressure stops it progressing. Electric brushes can help prevent excessive pressure.

Rebuilding with bonding and crowns

In moderate wear, lost tooth structure is rebuilt with composite bonding or crowns. A restoration placed without stopping the cause does not last.

Full-mouth rehabilitation in advanced wear

When bite height has noticeably decreased, the bite pattern of the whole mouth is rebuilt rather than individual teeth. If wear has progressed alongside the loss of many teeth, this is a picture that falls within the area we work in; the strategic implant protocol we use can be considered in these extensive cases.

What happens if it is not treated

The aim is not to alarm you, but to show why wear is easier to manage when it is caught early.

Sensitivity increases

As enamel thins and dentine is exposed, sensitivity to hot, cold and sweet things becomes more noticeable.

The risk of fracture rises

Thinned enamel becomes more fragile against forces it would normally withstand; even a small knock can chip off a piece.

Loss of bite height affects your face

As height decreases, the lower half of your face can look shorter, and the lines around your mouth can deepen.

If the cause is not removed, the same treatment wears down again

A filling placed without bringing reflux under control, or a crown fitted without a night guard, wears down again through the same mechanism.

If it progresses too far, individual repairs are not enough

Once wear has progressed enough to cover your whole mouth, the whole bite pattern may need to be rebuilt rather than individual fillings or crowns.

What to expect after treatment

The sequence below applies to the route that starts with protection and continues with restorative steps if needed.

The first few days
Getting used to a night guard can take a few days; mild jaw tension is normal. Wearing the guard consistently is the step that determines the result.
The first few weeks
Sensitivity starts to decrease with the night guard and correct brushing. If reflux treatment has started, its effect is usually seen during this period.
The first few months, if a restorative step is done
It takes time for your jaw muscles to adapt to the new bite height; check-up appointments may be more frequent during this period.
Regular check-ups in the long term
As long as the cause is kept under control, wear stops; check-ups are there to catch early if wear starts again. A night guard thins over time and needs replacing; this is part of your check-ups too.

Message us right away if

A sudden chip or sharp edge on a tooth. This can injure your tongue or cheek and usually needs assessing the same day.
Sensitivity to hot and cold that is increasing day by day. This can be a sign of progressing wear or another problem.
Pain or a poor fit while wearing your night guard. The guard may need adjusting; do not carry on with the pain.
Locking or severe pain in your jaw joint. This needs assessing without delay.

What determines the cost

We do not give a single figure here, because the difference between a route that ends with a night guard and one that extends to full-mouth rehabilitation is large. We can give you the right figure once the mechanism and degree of your wear are clear. The items involved:

The mechanism of the wear: A night guard, reflux management and correcting your brushing are procedures of different scope; sometimes more than one is needed together.
How many teeth and surfaces are affected: Wear limited to a single tooth and a pattern spread across the whole mouth are not costed the same way.
Whether bite height needs rebuilding: This is a decision that directly changes the scope of treatment and the number of sessions.
The restorative material used: The type of material used in bonding, crowns or full-mouth rehabilitation affects the total.

Frequently asked questions

Does tooth wear stop?

Once the cause is found and stopped, it stops progressing; lost tooth structure does not come back on its own but can be rebuilt when needed. A restoration placed without removing the cause carries on wearing down in the same way.

Does a night guard really work?

Yes, it is the most effective protection against wear caused by grinding and clenching. By directing the force onto the guard instead of from tooth to tooth, it largely stops the wear.

Can a worn tooth be fixed with a filling?

In moderate wear, the lost part can be rebuilt with bonding or a crown. But if the underlying cause, for example night-time grinding, is not brought under control, the new restoration wears down in the same way.

If reflux is treated, does the wear stop?

In erosion caused by reflux, yes: bringing the source under control largely stops the wear. Enamel already lost does not come back with this treatment, but its progress does stop.

If my wear is severe, do I need an implant?

Wear on its own does not require an implant; an implant becomes relevant if teeth have been lost along with the wear, or if tooth loss has been added to the picture. For teeth that are worn but still standing in the mouth, the goal is usually protection and rebuilding.

What is the difference between wear and decay?

Decay is a hole made in enamel and dentine by acid that bacteria produce, while wear is the smooth loss of the surface from mechanical friction or direct contact with acid. The two can sometimes be seen together in the same mouth, but their causes and treatments differ.

Does tooth wear cause pain?

In the early stage it usually causes sensitivity to hot and cold rather than sharp pain. In advanced cases, dentine and sometimes the tooth's nerve can become exposed, and at that point the pain becomes more noticeable.

In very advanced wear, does full-mouth rehabilitation fall within your area?

Yes, if the wear comes together with the loss of many teeth or the general collapse of your bite, this is exactly the area we work in. For teeth that are only worn but sound, protection and local restoration are discussed first; if you send us your X-ray, we will reply within 24 hours about which group you fall into.

Sources

Send your X-ray and we will tell you which option is realistic for your tooth.

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Next step

Send your X-ray and we will talk through the options.

Share your CBCT or panoramic X-ray. We will write back within 24 hours on which option is realistic for your tooth.

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