Teeth worn down by bruxism: when and how the bite is rebuilt

Many patients arrive at my office with the same sentence: "I feel my teeth look shorter every year." Nothing hurts, no tooth has fallen out, but the smile has aged and the crowns they already had are starting to fail. Behind it there is almost always bruxism, and it has almost always been working silently for years.

In this article I explain how to recognize the wear, why a night guard alone is no longer enough once the teeth have lost a lot of structure, and how I rebuild a worn bite without turning into crowns teeth that can be treated more conservatively.

Why do your teeth look shorter every year?

Bruxism is clenching or grinding the teeth involuntarily, mostly during sleep. That force, repeated night after night, first wears the enamel at the edges and then the dentin, which is softer and wears faster. The result is a shorter, flatter tooth, sometimes with chipped edges.

The problem is that it does not hurt. The wear progresses so slowly that the patient notices it only when it is already significant: in a photo, when the lower teeth barely show while speaking, or when an old crown fractures.

How do you know if you have bruxism?

Most people who clench do it asleep and have no idea. These are the signs you can check yourself:

• Jaw pain or fatigue when waking up
• Morning headaches around the temples
• Teeth that look shorter, flatter or have chipped edges
• Cold sensitivity without visible cavities
• Crowns, veneers or fillings that fracture often
• Someone who has heard you grinding at night

In the office it is confirmed by the wear pattern, which is characteristic, and by examining the jaw muscles and joint.

What damage does bruxism do over the years?

Tooth wear is the most visible part, but not the only one. Over time come fractures in teeth and restorations, sensitivity, muscle fatigue and, in some patients, joint discomfort. And there is an effect almost nobody knows about: the bite loses height. The upper and lower teeth get closer, until there is no room left for a restoration without removing more tooth.

Is a night guard enough if the teeth are already worn?

A night guard is essential, but it is worth understanding what it does: it protects and stops the damage, it does not give back what was lost. If the wear is mild, the guard and check-ups can be enough. When the teeth have already lost a lot of structure, a guard alone leaves the mouth as it is: short teeth, no room, and restorations that keep failing.

That is when a full mouth rehabilitation is needed, one that rebuilds what bruxism took away.

When does wear need a rehabilitation?

There is no magic number, but these situations tell me the patient probably needs to rebuild the bite and not just protect it:

• The teeth have lost an important part of their height, especially the front ones
• There is no room to restore a tooth without removing more structure
• Several crowns or restorations are failing or have marginal gaps
• Sensitivity or fractures keep coming back
• The smile looks aged because of short teeth

What is vertical dimension and why is it lost?

Vertical dimension is the height of the bite: the distance between the upper and lower arches when you close. With wear, that distance shrinks. Recovering it is what gives back the space to rebuild the teeth with the thickness they need to last, and it is also what restores proportion to the smile.

But it is not recovered by eye. How much height can be safely restored depends on the joint, the muscles and the way you bite, which is why it is planned with a complete analysis and tested in the mouth first.

Do you need to wear a deprogrammer first?

It is one of the questions I hear most from patients who have already been evaluated elsewhere. My answer is clear: a deprogrammer is used when there is a clinical indication, not as a mandatory step for every patient with bruxism.

Its purpose is to obtain a stable, reproducible jaw position when the existing bite does not provide a reliable reference. In many patients with wear the bite is stable; what is missing is tooth structure and space. In those cases the new height is planned and built directly with provisionals. If the examination shows instability, then a deprogrammer is used before the final position is defined. Nor does it make sense to set in advance how many days it must be worn: the goal is to obtain reliable records, not to complete a set period.

Why study both arches if the wear is in one?

Because both arches work as one system. The most visible wear is often in the lower teeth, but the upper crowns may have marginal discrepancies, and the way both arches fit together defines the final bite. Planning the relationship between them is what makes it possible to recover restorative space and build stable front-teeth guidance.

Studying both arches does not automatically mean crowning every tooth.

Crown, veneer or onlay?

That decision is made tooth by tooth, based on how much sound structure and enamel remain, existing restorations, whether the tooth is vital, the available space and the load it carries. I do not consider it appropriate to place full crowns on teeth that can be predictably restored with a more conservative preparation.

A panoramic X-ray is not enough to decide this well; it gives general information. A complete periapical series is needed, showing each tooth individually. X-rays are not included in the assessment, but they are always required. And root canals are not done preventively: only where there is a clinical and radiographic indication.

The material is also chosen tooth by tooth: zirconia or lithium disilicate, depending on position and demands. In a patient with bruxism, the preparation, thickness, bonding and bite design matter more than the shade.

How is a worn bite rebuilt, step by step?

1. Complete examination and occlusal and functional analysis: joint, muscles, path of closure, contacts and stability of the jaw position.
2. Digital design and diagnostic wax-up: 3D intraoral scan, photographs and design of the new tooth shape, the new height and the relationship between both arches.
3. Provisionals that work as a prototype: they are not temporary crowns while you wait. In them we evaluate and adjust height, contacts, front-teeth guidance, speech, chewing, muscular comfort and esthetics.
4. Resin try-in: before the ceramics are made, shape, proportions, height and bite are checked in the mouth.
5. Definitive restorations: the ceramics reproduce a bite that has already been tested in your mouth, instead of making the ceramics first and adapting the bite afterwards.
6. Night guard and check-ups: the guard is always included.

What if I am also missing teeth or have implants?

Bruxism does not rule out implants, but it changes the planning: the load falls on the implant and the prosthesis, and it is compensated with the number and position of implants, the material and the guard. When most teeth are missing, the rehabilitation can be done on implants, for example with All-on-4. Many mouths combine both paths: rebuilt natural teeth and some implants. If you are curious about the brand choice, I explain it in Straumann and Neodent.

How is the work protected afterwards?

Rebuilding the bite does not eliminate bruxism. That is why a night guard is delivered at the end and periodic check-ups are scheduled. The guard is not an extra: it is what protects the rehabilitation from the same forces that caused the wear. In my experience, if the first year passes without incident, the rehabilitation performs well from then on.

What if you are traveling from abroad?

A rehabilitation on your own teeth usually takes about 10 to 12 days in Medellín, provided the preliminary studies do not reveal anything that requires changing the plan. If you can, have the periapical series taken at home and send it before your trip. There is a final check-up before you fly back, then two video follow-ups at 15 and 30 days, with a written summary of the treatment for your dentist. If you are comparing specialists, you may find how to choose an oral rehabilitation specialist in Medellín and the guide to safe dental tourism in Colombia useful.

If your teeth look shorter every year, the best time to check it is before more structure is lost. Write to me and we will review your case.