Dr. Dan Tache, DMD

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Dr. Dan Tache, DMD The "TMJ - Sleep Guy." Helping patients and clinicians navigate TMJ, TMD, sleep apnea, and orofacial pain.

10/19/2026

When a patient has been over-advanced in an oral appliance, the lateral pterygoid muscle gets locked in a shortened position. It develops trigger points. The patient wakes up with mid-face pain, the bite feels off, cannot open all the way, headaches throughout the day.

The fix is to stretch the muscle back. And this is where most dentists make the second mistake.

You stretch the lateral pterygoid by pushing the jaw backwards. It hurts, just like stretching a hamstring hurts when the hamstring is tight. And the instinct, which I had myself early on, is to tell the patient they are stretching too hard. You are going to damage the jaw joint. Back off.

You are not damaging anything. If you are not stretching those muscles and getting some pain, you are not stretching hard enough. The muscle is not being damaged. It is being rehabilitated. It has been held in a foreshortened position for months, and it needs to be worked back to its normal resting length.

Reduce the advancement first; bring the jaw back to end-to-end or just slightly beyond. Then have the patient perform stretching exercises that push the mandible posteriorly and hold the stretch at the point of tension.

The bite will come back. The mid-face pain will resolve. The morning headaches will decrease. But only if you stretch hard enough for it to actually matter.

Treat the muscle. Not the teeth.

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10/16/2026

When a sleep patient is not responding to treatment, the default next step is almost always the same. Advance the jaw further forward. Keep titrating. More protrusion. More protrusion.

This approach is incomplete. And in some cases, according to Hokema and others, it actually makes the breathing worse by reducing the dimensions of the pharyngeal space rather than opening them.

Here is the anatomy. The airway collapses at more than one level 82% of the time. The superior constrictor muscles that form the walls of the pharynx run north to south. They insert on the mandible. Advancing the jaw forward does not stiffen those muscles. Increasing vertical dimension does.

The Hu and Comisi study published in the Journal of the Academy of General Dentistry showed that when vertical dimension is properly incorporated and optimized, 67% less mandibular advancement is needed to achieve the same airway outcome. You stiffen those constrictor muscles. The airway stabilizes. And the patient is not cranked out to maximum protrusion with a bite that feels wrong all morning.

You can test this chairside without a pharyngometer. Put something between the teeth to open the vertical — some wax, a few throat sticks — and ask the patient to try to snore. Increase the vertical incrementally. At some point, they cannot snore anymore. Record that bite. Send it in. You just found a better position than maximum advancement ever got you.

You were working on the x-axis when the y-axis was the answer.

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10/15/2026

If you are making a single-arch appliance for a patient who grinds and has either a TMJ problem or a sleep-related breathing disorder, there is one design rule that is not negotiable.

It must be made on the maxilla.

A mandibular appliance at night has no mechanism to prevent the jaw from drifting back. There is no way to build an anterior ramp on a lower appliance that will catch the upper teeth during sleep. Many dentists prescribe lower appliances because they are smaller and more tolerable for the patient. I understand that. But the moment the patient loses consciousness and muscle tone drops, the jaw on a lower appliance has nothing to stop it from going back.

For a TMJ problem during the day, it does not matter whether the appliance is upper or lower. But we are talking about sleep. And during sleep, the physics of the situation demand a maxillary appliance with an anterior ramp.

Then put your finger in the patient’s ear canal and have them bite down with the appliance in place. If you feel compression or clicking, the appliance is not thick enough. The disc is still being displaced. The joint is still being loaded. Thicken the posterior until that compression and clicking are gone.

If compression or clicking persists after all of that, the appliance is not helping the TMJ. It is aggravating it. And you need to know that before you send the patient home with it.

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10/14/2026

When a patient brings in an existing appliance that is worsening their symptoms, you do not always have to start over.

Send it back to the lab and have an anterior ramp added to the upper appliance.

Here is what the ramp does. It hangs down from the palatal surface of the upper device. When the patient falls asleep and the lower jaw begins to drift posteriorly, the lower anterior teeth catch on that ramp. The mandible cannot slide back. Easy peasy, as I tell patients. The joint stays decompressed. The airway stays supported.

You may also need to have the posterior section thickened to ensure close occlusal contact and prevent drifting of the posterior teeth. And the ramp needs to be long enough to be effective; it will interfere with speech, which is expected and not a problem for a device worn only during sleep.

But that is the entire modification. A ramp on the front. Posterior thickening if needed. That single change can resurrect a failing appliance completely and transform what the patient wakes up feeling like every morning.

The problem in most cases was never the appliance concept. It was the absence of one structural element that prevented the jaw from going where it should not go.

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10/13/2026

Many of the patients who come to me with worsening TMJ problems, worsening bruxism and worsening sleep have one thing in common.

Someone made them a mouthpiece.

Here is what happens. When a patient falls asleep and loses consciousness, the jaw automatically drifts back. With a flat glassy surface between the teeth — whether it is an NTI, a biostar-formed night guard, or a lab-fabricated flat plane splint — the jaw can slide back further than it would without any appliance at all. That flat surface enables it. There is no resistance. The jaw just goes.

When it goes back, it does two things. It jams the retrodiscal tissue behind the condyle and it encroaches on the airway. The patient starts breathing against increased resistance. The body generates an arousal. And the patient bruxes harder in response because the appliance is making one of the underlying problems worse.

The mouthpiece protects the teeth. It does not stop the bruxism. And if the design is wrong, it perpetuates everything you were trying to fix.

This is not a rare edge case. This is the most common design mistake in dental sleep medicine. And it is the first thing I look for when a patient comes to me having gotten worse after being treated somewhere else.

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10/12/2026

In one week, I saw three children who had just finished Invisalign orthodontics.

All three were wearing their retainers at night. All three came in locked up.

The flat permissive retainer had allowed the jaw to slide back far enough to jam the retrodiscal tissue, displace the disc and lock the joint. Three different kids. Three different practices. The same mechanism in all of them.

This is not rare. This happens constantly. And the fix is straightforward.

Do not have children wear Invisalign retainers at night. Teeth can be adequately retained by wearing the aligner during the day only. The orthodontist may push back on making new retainers. The clinical argument is clear and the documented risk is real.

Day wear for retention. Night wear for nothing.

The jaw has no muscle tone to protect it during sleep. A flat permissive surface at night, whether it is a retainer, a night guard or a mandibular splint, allows the jaw to go where it should not go. The joint pays the price.

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10/02/2026

A patient comes in with gum recession. You tell them they need to brush more gently. They come back six months later, and the recession has progressed.

It was not their toothbrush.

When a patient has sleep bruxism, the forces generated against the teeth during sleep can reach five to six hundred pounds per square inch. That force does not just wear down the biting surfaces. It stresses the entire periodontium. The gum tissue recedes. The enamel chips away at the cervical margin of the tooth — the chipped-out pieces right at the gum line are called abfractions, and they are often discolored. They may or may not be cavities, but they are a clinical signal.

Look for the full picture. Flattened anterior teeth — especially when the wear is mostly on the front teeth — tell you the jaw is being driven forward repeatedly. That is almost always a breathing-related bruxism, because the body is advancing the jaw to open the airway and oxygen saturation goes up when it does.

Abfractions at the gum line. Recession that is not explained by brushing habits. Anterior wear. These are not cosmetic findings. They are a sleep disorder presenting in the mouth.

You are looking at it every single appointment. You just may not have been reading it correctly.

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10/01/2026

Every bruxism patient who walks into your practice deserves four questions before you make them anything.

First. On a scale of 1-10, 1 being the worst and 10 being the best, how would you rate the quality of your sleep? Do you sleep through the night or wake up frequently?

Second. Do you sleep with your mouth open? Wake up with a dry mouth? Do you snore? Is there a family history of sleep apnea?

Third. Do you have urges to move your legs in the lower part, in the afternoon or evening? Do they feel creepy, crawly, crampy? Does moving them help? Does your partner say you move around the bed a lot?

Fourth. Did you have growing pains as a child?

Two or three yes answers to the third and fourth questions, and you are likely looking at restless leg syndrome. Yes answers to the second set, and you are looking at a breathing-related bruxism. And they can say yes to everything, because both can exist in the same patient at the same time. I had both myself.

Four questions. That is the entire screening. It does not require a sleep study. It does not require specialized equipment. It requires two minutes and the willingness to ask.

The patients who need this are already sitting in your chair. They have been grinding their teeth for years, and nobody has asked them the right questions.

You can be the one who finally does.

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10/01/2026

This needs to be said plainly because it is one of the most common misunderstandings in dental sleep medicine.

A mouthpiece will not stop bruxism. It will protect the teeth from the force of the bruxism. That is not the same thing.

If the underlying problem is restless leg syndrome and you put the patient in a night guard, they will still clench. They will still be tired in the morning. They will still have jaw pain and headaches. They will still have the metabolic and cardiovascular comorbidities that come with years of fragmented sleep. You have just moved the damage from the teeth to the acrylic.

And if the mouthpiece design is wrong - a flat plane device, upper or lower, with no ramp to prevent posterior drift - you may have made both the breathing and the movement disorder worse. When the jaw slides back on a flat surface during sleep, the airway narrows, and the bruxism intensifies in response.

The mouthpiece is a necessary part of the solution. But it is not the solution.

The solution requires identifying the root cause. Breathing-related or movement-related. Treating the underlying disorder. And then using a properly designed directive appliance with an anterior ramp to support the jaw in the right position while the treatment works.

Protecting the teeth without addressing the cause is treating the effect of the problem. The problem keeps running.

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09/30/2026

Your bruxism patient has either a breathing problem or a movement disorder. Here is how to tell the difference in two minutes.

When someone is grinding, you can fairly quickly discern which one it is by asking a few simple questions.

For a breathing problem: when you wake up in the morning, did you have a bad night's sleep? Did you wake up with your mouth open? Do you snore? Is there a family history of sleep apnea? If the answer is yes to most of those, you have your direction.

For a movement disorder: do you have an urgency to move your legs later in the afternoon or evening? Do they feel creepy, crawly, crampy in the lower part of your legs? Does moving them make it better? Does your sleep partner say you move around the bed a lot? Did you have growing pains as a child?

Two or three yes answers to that second set and you are looking at restless leg syndrome. No sleep study required. The diagnosis is clinical. You just have to ask.

And here is the part most dentists miss. Both can exist in the same patient at the same time. A breathing problem and a movement disorder driving the grinding simultaneously. Treating only one of them leaves the other running all night.

Ask both sets of questions. Every bruxism patient. Every time.

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