Botox, Night Guards or Physio for Clenching and Grinding?

Your dentist points to a flattened edge on a molar. Your partner mentions a noise you make at 2 a.m. You've been waking with tired cheeks and a dull headache, and last week an ad for jaw Botox appeared on your phone, as if it had been listening.

So you start searching for teeth grinding treatment, and it narrows to three options: a night guard, Botox or physio. People tend to compare them as if they were competitors, but they don't all aim at the same thing. Sorting out what you're actually trying to fix usually makes the choice clearer. Night guards and Botox belong to dentists and physicians, so anything below is general information to take into that conversation, and it isn't a recommendation for or against either.

First: what is bruxism, and does it need treatment?

Bruxism is the term for clenching or grinding, whether you're asleep or awake. An international consensus paper describes it, in otherwise healthy people, as a behaviour and not a disorder. Lots of people do it. Bruxism treatment becomes a real question when it's causing a problem.

That gives you a useful first step. Ask which of these you're dealing with:

• Teeth: wear, chips, or broken fillings. This is one for your dentist.
• Pain: sore jaw muscles, tenderness in the temples, or trouble chewing. Several kinds of provider can help.
• Sleep: loud snoring, unrefreshing sleep, or morning headaches. It's worth mentioning to your physician.
• Nothing yet: a partner hears grinding, but your teeth and jaw are fine. You may not need treatment at all, though your dentist can keep an eye on it.

Night guards: what they do, and what the evidence says

A night guard, also called a splint or oral appliance, is something a dentist can provide. The idea is simple: it sits between your upper and lower teeth, so they contact the appliance and not each other.

The research is less settled than you might expect. A systematic review of oral splints rated the evidence as very low quality, with no demonstrated benefit for pain and no data on tooth wear. A 2023 guideline in The BMJ also made a conditional recommendation against reversible splints for chronic jaw pain.

That doesn't show guards are useless. Very low quality evidence means researchers don't know much, and the lack of tooth-wear data means the question hasn't been properly answered. Your dentist can see your teeth and may have a good reason to suggest one, particularly to protect teeth or dental work. Sensible questions to ask:

• What do you hope this will do in my case: protect my teeth, reduce my pain or both?
• How will we know whether it's working?
• What should I do if my jaw feels worse with it or my bite feels different?

TMJ Botox: what it does, and what the evidence says

Botulinum toxin, known by the brand name Botox, is injected into the chewing muscles to weaken them for a while. It's provided by physicians and by some dentists.

Here the research points in two directions, and you deserve to see both. A 2024 meta-analysis favoured botulinum toxin over placebo for muscle-related jaw pain, at medium-to-low certainty. The BMJ guideline, looking at chronic TMD pain more broadly, made a conditional recommendation against it. A conditional recommendation means the panel leaned against it for most people, while recognizing that some might reasonably choose it after a good discussion.

If you're considering it, ask the provider:

• What result is realistic for my symptoms, and how long does it last?
• What are the side effects, and how would repeat treatments affect the muscle?
• Is it approved in Canada for this use, or would it be off-label?
• What would you suggest trying alongside it, or before it?

Physio: what it can do, and what it can't

Physiotherapists don't fit night guards or give Botox, and we can't look at your teeth and tell you whether they need protecting. Physiotherapy aims at the pain, stiffness and movement side of the problem, and at daytime habits.

For jaw pain lasting three months or longer, the BMJ guideline gave strong recommendations to therapist-assisted mobilization, manual trigger point therapy and supervised jaw and postural exercise, along with cognitive behavioural therapy. In one pooled analysis, about 36% more people reached a 1 cm drop in pain with mobilization than with placebo.

Two honest caveats. Most trials in this area have a high risk of bias, so the size of any benefit is uncertain. And that evidence concerns pain, so it doesn't show that physiotherapy stops anyone from grinding their teeth at night.

Daytime clenching is often a different story, simply because you can notice it. A common cue is "lips together, teeth apart." Your teeth generally don't need to touch unless you're chewing or swallowing. Try setting a few reminders during a busy workday and see how often you catch yourself pressing down. Our overview of what the research supports for TMJ treatment goes further into the evidence, and this article on TMJ massage explains what hands-on treatment involves.

Side by side

• Night guard. Provided by a dentist. Main aim: to come between your teeth at night. Evidence: very low quality, no demonstrated pain benefit, no tooth-wear data.
• Botox. Provided by a physician or dentist. Main aim: to reduce muscle activity and pain. Evidence: mixed. A meta-analysis favours it over placebo; a guideline leans against it for chronic pain.
• Physiotherapy. Provided by a physiotherapist. Main aim: pain, movement and habits. Evidence: strong guideline recommendations for chronic pain, resting on trials with a high risk of bias. Not shown to stop grinding.

These aren't either-or choices. Someone might wear a guard their dentist recommended to protect their teeth while also working with a physiotherapist on jaw pain. If you're seeing more than one provider, make sure each knows what the others are doing.

A sensible order to think about it

1. See your dentist if you have tooth wear, chips or broken fillings, or if anyone has heard you grinding. They can look at your teeth and discuss protection.
2. See your physician if you have loud snoring, poor sleep or new morning headaches, or if you think a medication may be involved.
3. Consider physiotherapy if your main issue is jaw pain, stiffness or daytime clenching.
4. Discuss Botox with a physician or dentist if that's an option you want to explore, and bring the questions above.

If jaw pain is your main concern

We offer TMJ physiotherapy at OMNI Health and Rehab, 960 Cumberland Ave in Burlington, with physiotherapists Juhi Israni and Devanshi Patel. A first visit is 60 minutes and follow-ups are 30. We can work alongside your dentist or physician. You don't need a referral to see a physiotherapist in Ontario, although some plans ask for one before they'll reimburse, and we direct bill to most extended health plans.

This article is for educational purposes and doesn't replace an assessment by a qualified health professional.

You can read more about TMJ physiotherapy at OMNI or book a first visit when you're ready.