Draper and Lehi, Utah
Masseter Botox and TMJ are not the same treatment
One is about the shape of your face. The other is about what your jaw gets up to at three in the morning. They need different doses, different placement and different expectations. Treat them as one plan and somebody goes home disappointed.
Goal one
Jaw slimming
A wide lower face is often muscle rather than bone. Reduce the bulk of an overdeveloped masseter and your jaw narrows over a couple of months. The change is gradual. It is the muscle shrinking because it is doing less, not anything being taken out.
Not every square jaw is a muscular one. If your width is skeletal, this treatment will not change it, and I will tell you that rather than let you find out in eight weeks.
Goal two
Clenching and jaw tension
Take some force out of the muscle and the ache eases, along with the morning tightness and the wear that comes with heavy grinding. The dose and the placement are different from slimming, and slimming may turn up as a side effect you either want or do not.
Using neurotoxin for jaw tension is off label. There is published evidence supporting it for muscular pain, and that is a different claim from curing joint disease. I am careful about the difference.
The thing worth understanding
What goes wrong here is placement
The two things people fear most from masseter treatment, a changed smile and new jowling, usually are not caused by too much product. They are caused by product landing in the wrong compartment, or by taking bulk out of a face that was leaning on it.
That is the same principle running through how I treat the upper face. Muscles have regions that do different jobs, and which region gets the dose matters far more than the total number of units. I have built most of my career on that one idea, which is either focus or a personality defect.
Straight answers
Masseter and TMJ questions
Will masseter Botox give me jowls?
It is a real risk, not something the internet made up, and it depends on where the product goes and how much bulk you have to lose. The masseter is not one flat slab. Treat the wrong part of it, or too much of it in someone without much lower face support, and you can unmask laxity the muscle was quietly holding up. Whether you are at risk is something I work out before treating, not after.
Can it change my smile?
Yes, if the product reaches muscles it was never meant to reach. Your smile muscles run close to the front edge of the masseter, so a placement too far forward or too shallow can catch them. A changed smile after masseter treatment is usually a placement error rather than a dose error, and it goes away as the effect wears off.
How long until my jaw looks slimmer?
Slimming is not the same thing as the muscle relaxing. The relaxing happens within a couple of weeks. The visible narrowing waits for the muscle to lose bulk from not being used, which commonly takes six to eight weeks and sometimes longer. Two sessions are often needed before the change is obvious, so pack some patience. Individual results vary.
Does it help TMJ pain and grinding?
For a lot of people it reduces clenching force and the ache that comes with it, and published studies support that use, though it is off label. It is not a cure for temporomandibular joint disease and it will not fix a structural joint problem. If your pain is coming from the joint rather than the muscle, you need a different plan and probably a dentist.
Is insurance likely to cover it?
Usually not for cosmetic jaw slimming. Coverage for TMJ related treatment swings wildly by plan and often wants documented conservative treatment first. I would not build your plans around getting it covered.
Will I still be able to chew?
Yes. The point is to take the excess force out, not to switch the muscle off. Some people notice chewing feels less powerful with tough food for a few weeks, particularly after a first treatment at a higher dose. Steak stays on the menu.
Read first
Before you book
How long does Botox take to work?
Most of it arrives in the first week. The interesting number is from the placebo arms, and it explains why day one feels like something is happening.
How many units of Botox do I need?
Typical ranges by area, why two people with the same lines can need very different doses, and how to verify what you actually received.
How long does Botox last, and why did mine wear off early?
Three to four months is typical. Wearing off at six weeks usually means something specific, and it is rarely what patients are told.