Many factors that can contribute to TMJ include a bad bite, teeth grinding/clenching, excessive gum chewing, jaw injury, arthritis and stress. Some patients experience a painful TMJ because they clench their jaw when running or exercising. Poorly-fitted dentures also can frequently cause jaw pain as well as TMD. When patients wear dentures that are too loose, they consistently try to realign them, which results in significant strain on their TMJs. Dentures can also add to chewing times, adding more work to TMJs. Make an appointment with Smile Centre, letting our dentist determine an accurate cause of your TMJ pain that is essential for planning your treatment.