New studies have recently come out that link TMD to sleep apnea. They are fairly recent, but the research suggests that it could be TMD surfaces when a patient has obstructive sleep apnea and during the episodes or apnea they might be clenching and grinding their teeth to help unconscionably open the airway.
What we do know is there is a way we can treat both! With some of our dental sleep devices we can design them so that both conditions can be treated at the same time, with one device.