My husband's jaw pops when he chews and he is now having jaw pain associated with it-could this be tmj?

Yes!!: This is a classic presentation of tmj. For these types of patients i recommend soft foods, warm compress to the affected side, mouth guard if they grind there teeth at night, and anti-inflammatory meds. If it persists, see a dentist who treats TMJ (not all do or like to).

Joint damage: It is tmj. The popping is the internal disc moving into, and out of position, causing the joint to be compressed and inflamed. He needs to have his bite corrected to relieve the disc compression, heal the joint capsule and surrounding tissues and to, stop the popping.

Popping and TMJ: Popping with the tmj/tmj's usually signifies a displaced articular disk (forward.) not sure if you also have locking of the jaw- closed lock meaning limited opening; open lock- can't close.) need to see your dentist or TMJ specialist as your problem may become worse.

Yes: Yes, its TMJ. See a TMJ experf for advice. Any dentist can be a TMJ expert with the proper training and experience. Most commonly, oral surgeons, prosthodontists, and orofacial pain specialists. Ask your MD, your dentist and your dental society for referrals.