TMJ refers to the temporomandibular (jaw) joint. People with a TMJ condition can have a number of problems with the jaw joint, some of which can be aggravated by appliances and treatments like Invisalign clear aligners, and some which can improve, remain the same or even cause the condition to deteriorate. To find out if your TMJ problem will adversely impact treatment, please book an appointment to consult your Invisalign dentist.