If you are looking for an Calgary dentist that specializes in dealing with joints and joint disorders you have come to the right spot. Calgary dentists who are trained in dealing with TMJ which stands for temporomandibular joint, or the jaw joint. The TMJs are the small joints in front of each ear that attach the lower jaw (mandible) to the skull. They allow you to perform such functions as opening and closing your mouth, chewing, speaking and swallowing.