TMJ
...r mouths the rounded end of the mandible, called condyles, glide along the joint socket of the temporal bone. These condyles slide back to their original position when we close our mouths. To keep this motion smooth a soft disc lies between the condyle and the temporal bone. This disc absorbs shocks to the TMJ from chewing and other movements. Some problems relating to this joint are caused by habitually clenching or grinding your teeth because you increase the wear on the cartilage lining of the temporomandibular joint. Also, "Internal Derangement” of this joint is present when the posterior band of the meniscus is anteriorly displaced in front of the condyle. Often the displaced posterior band, will return to its normal position when the condyle reaches a certain point. This derangement causes you to hear a popping or clicking sound in your ear, commonly called TMJ ...