Thank you for taking the time to teach me and the community a bit more about the diagnoses you mentioned. I am also glad to hear that your husband is doing so well 19 years after his AVM. While I did not find anything directly referring to bruxism on Connect currently, there is a discussion on TMJ (temporomandibular joint) taking place that many members talk about many different symptoms. I reccomend at least giving the discussion a look here:
There is also a conversation that includes some discussion about AVM you may find value in joining. You can find that discussion here, https://connect.mayoclinic.org/discussion/arteriovenous-malformation-avm-survivors-and-side-effects/.