By Michael Cyr, PT, DPT Something to chew on The jaw is the most active joint in the body opening and closing up to 2000 times a day to account for all of the eating, talking and breathing that we do (1,2). It is no wonder that disorders of this joint are the second most common occurring musculoskeletal condition only behind low back pain (3). The breakdown The jaw is made up of two bones, the temporal bone and mandible and is coined the temporal mandibular joint or TMJ for s