The research on this is fairly consistent: braces themselves don't cause TMD. But that doesn't mean the timing is always a coincidence.
What the evidence actually shows
Large bodies of orthodontic research have not found braces or clear aligners to be a direct cause of TMD. If anything, correcting certain bite problems — like an open bite or crossbite — with orthodontics can improve TMD symptoms for some patients rather than cause them.
So why does it sometimes seem connected?
A few real mechanisms explain why people notice jaw pain during or after orthodontic treatment:
- Timing coincidence: TMD often develops gradually in the same age range braces are common, so the two can appear connected without being causally linked.
- Bite changes during treatment: As teeth move, contact points shift, and mid-treatment bite changes can temporarily create uneven pressure that the jaw has to adapt to.
- Unmasking existing TMD: If someone already had mild, unnoticed joint instability, the process of moving teeth and adjusting bite can make existing symptoms more noticeable, even though braces didn't cause the underlying issue.
- Final bite outcome: Rarely, the end result of treatment can create tooth contact patterns that force the jaw into an awkward closing position, which can itself become a source of strain.
What to do if your jaw hurts during orthodontic treatment
Mention it to your orthodontist — bite adjustments mid-treatment are normal and they can assess whether anything about your specific progress is contributing. In the meantime, general jaw-friendly habits and our Rocabado 6x6 Program can help manage symptoms without interfering with your orthodontic treatment.