What does changing your bite height mean during reconstruction?

What "bite height" actually describes

Your upper and lower back teeth meet in a position that sets how far apart the jaws sit when you close. Dentists call that distance the occlusal vertical dimension, or OVD; patients tend to call it bite height. It is held by the teeth themselves, so when teeth wear, chip or are lost, the height can change.

Two things make this more subtle than it sounds. First, worn teeth do not always mean a lower bite. As teeth wear slowly over years, the jawbone and gums often follow them, a process called compensating eruption, so the jaws can end up almost the same distance apart while the teeth themselves are short. Second, there is no single measurement that reliably says how much height has been "lost." An examination can estimate it from the wear pattern, the way the lips and face look at rest and when speaking, the space between the teeth when the jaw relaxes, and photographs or models, but reviews describe these methods as estimates rather than exact measurements.

That is why the decision to raise a bite is usually driven by restorative need (is there room to rebuild the teeth?) and appearance (how much tooth should show?) rather than by a claim that the bite has "collapsed" and must be put back.

Why rebuilding worn teeth may need more room

A crown, onlay or bonded composite restoration needs a certain thickness of material to be strong and to look like a tooth. When the teeth are already short and the opposing teeth meet them, there may be very little space to add that material. Something has to give. The usual options, each with trade-offs, are:

• Raise the bite. Restore the teeth taller than they are now so the jaws close a little farther apart. This creates room without removing more tooth structure, but it changes how the whole set of teeth meets, so it usually involves many teeth in at least one arch and needs careful testing.
• Shorten or reshape the opposing teeth. This makes room on one side by removing enamel or dentin from the other, which is faster but sacrifices sound tooth that cannot be replaced.
• Move teeth with orthodontics. Aligners or braces can reposition worn or over-erupted teeth to make space before restorations are placed, which adds time; whether it is worthwhile is decided case by case.
• Accept a smaller rebuild. Thinner or fewer restorations within the room that exists, which may limit how much shape and strength can be restored.

Which of these fits you depends on how many teeth are worn, why they wore, how the jaw joints and muscles behave, and what you want the result to look like. The guide on short, worn teeth and what should be checked before rebuilding them covers that assessment, and the services page lists full-mouth reconstruction as a service.

How the change is planned

Raising a bite is a design decision before it is a clinical one. A plan that proposes it should be able to show you:

• Records of your bite and jaw joints. An examination of the teeth, muscles and joints, notes on clicking, tenderness or limited opening, and a record of how your jaws relate when relaxed and when closed.
• Models or digital scans of both arches, often mounted or aligned so the proposed new position can be studied.
• A wax-up or digital design that shows the intended shape and length of every tooth at the new height. This is the blueprint for the trial phase and for the final restorations.
• How much increase is being considered, and why. Reviews describe the increase as the smallest amount that gives the restorations the room they need, not as a target in itself. Ask for the amount in plain terms and for the reason behind it, rather than accepting a number as a target in itself.
• What happens tooth by tooth. Which teeth will be built up, with which type of restoration, and which teeth are left alone. Reviews of worn-tooth rehabilitation have not found strong evidence that one material outperforms the others, so either bonded composite or laboratory-made restorations may be reasonable, and the choice should be explained. The guide on how a reconstruction plan should explain each tooth sets out what that list should contain.

How the change is tested before it is final

Because the evidence for raising bites comes almost entirely from case series rather than controlled comparisons, the new height is usually treated as a proposal to be tested rather than a fact to be built. A recent systematic review found that most published reports included an evaluation phase, in which the patient wore the new height in a reversible form for a period before definitive restorations were made.

The trial can take several forms:

• Bonded composite build-ups placed directly on the worn teeth at the new height. They can be adjusted, added to or polished during the trial, and long-term reports show that composite restorations placed this way can perform over years, with most problems repairable rather than requiring replacement.
• Laboratory-made provisional crowns or onlays that copy the wax-up.
• A removable appliance worn over the teeth. This is the least invasive option, but the one randomized trial identified by that review noted that removable devices tended to bring chewing difficulties and speech and appearance complaints, and the older safety review found fixed restorations more predictable and better adapted to.

During the trial, the dentist checks how evenly the teeth meet, listens to your speech, examines the muscles and joints, and asks what you have noticed. If the position is comfortable and the design looks right, the final restorations copy it. If not, the trial restorations are adjusted and worn again. How long a trial lasts varies from person to person; ask the office how the trial will be judged complete for you rather than expecting a fixed number of weeks.

What to expect while adapting, and what to report

Some awareness of a new bite is common in the first days and weeks. The published reviews describe these symptoms as generally self-limiting, meaning they settle on their own, when the increase is modest and clearly needed. You might notice:

• Chewing awareness. The teeth meet in a slightly different place, so food may feel different and you may bite your cheek or tongue once or twice at first.
• Speech sounds. "S" and "F" sounds depend on the front teeth and lips, and a change in tooth length can alter them briefly.
• Muscle tiredness. Jaw muscles working at a new length can feel tired by evening, especially in the first week or two.
• Joint awareness. A sense that the jaw joint is "different," occasionally with a soft click.

Report any of these if they are getting worse rather than better, and report the following promptly during office hours: pain that is constant or wakes you, a jaw that locks open or closed, a click that comes with pain, a tooth that suddenly feels high or hits first, or a chipped or loose provisional. These are reasons to adjust the trial, not signs of failure.

Severe dental infection or injury is not expected from a bite change. Even so, the general rule applies to everyone: difficulty breathing or swallowing, rapidly spreading swelling of the face or neck, fever with facial swelling, uncontrolled bleeding or serious injury belong in an emergency department or with 911, not on the appointment request form.

What the practice does not claim

Raising a bite is a restorative procedure with a restorative goal: room to rebuild worn teeth in a shape and strength that can last, and a way of meeting that is comfortable and even. It is not presented here as a treatment for anything else.

• Facial appearance. Restoring tooth length can change how much tooth shows and how the lips are supported, but no claim is made about wrinkles, jowls, facial "lifting" or how old you look.
• Posture, headaches or systemic health. No causal link between bite height and these is claimed.
• TMJ disorders. Jaw joint and muscle disorders have many causes, often improve on their own, and are generally managed first with reversible, conservative measures. Symptoms you have now are assessed separately from the reconstruction, and raising a bite is not offered as a cure for them. Occlusal guards and TMJ-related care are listed services; what suits you follows from the examination.
• Protection against future wear. New restorations can wear, chip or stain. If grinding or clenching contributed to the original wear, a night guard is commonly advised to protect the result, and the habit itself is discussed as part of the plan.

Questions to ask, and the next step

Bring these to the consultation:

1. Do my teeth need more room to be rebuilt, and if so, why is raising the bite preferred over the alternatives for me?
2. How much increase is proposed, in plain terms, and what sets that amount?
3. How will the new height be tested before anything is final, and how will we decide the trial has worked?
4. What should I expect to feel during the trial, and what should prompt a call?
5. Which teeth are restored, with what, and how is the plan priced so I can compare it fairly? The guide on why reconstruction estimates differ explains what belongs on that list.
6. What will protect the result afterward, and will I need a night guard?

Loul Dental Studio lists full-mouth reconstruction, same-day porcelain crowns, onlays and overlays, bonding, clear aligners and occlusal guards among its services. If your teeth have worn short and you have been told your bite may need to be "opened," an examination with models or scans is the place to start. You can request an appointment online, or call (805) 565-5111 during office hours, Monday to Thursday 8:00 am to 5:00 pm, with select Fridays by appointment. A request is not a confirmed appointment; the team follows up to schedule.