Hi Lucy,
I am sorry your husband is suffering. I have only had short term TMJ..it comes and goes, and isn't as bad as my TN so I have never sought further treatment for it. Sorry I can't help you more.
I did a search on this site ..maybe you can find some help there
http://neurotalk.psychcentral.com/sh...ndibular+Joint
Also here are some sites I found
http://www.tmj.org/
http://www.emedicinehealth.com/tempo...article_em.htm