What causes temporomandibular joint dysfunction to develop?

Usually overuse: Usually overuse from gum chewing, teeth grinding tension or stress. People who like chewy and crunchy foods are a more risk. Crunching ice etc.... The key to treatment is first to try a softer diet.

Number of causes: Tmj dysfunction and pathology can have a number of causes. Some of these may include, congenital anomalies, trauma, abnormal habits, occlusion or bite problems that may be teeth and/or skeletal related, autoimmune diseases (arthritis, etc), tumors, and certain lifestyles. Unfortunately, having some dental procedures peformed may also initiate some symptoms associated with TMJ dysfunction.

Few thoughts: Causes of TMJ syndrome are not completely understood.. Causes may include, misalignment (malocclusion) of or trauma to the teeth or jaw, teeth grinding (bruxism),, poor posture, stress or anxiety, arthritis or other inflammatory musculoskeletal disorders, excessive gum chewing. Treatment can be complex and beyond the scope of this answer. See a TMJ expert for guidance.