My mouth guard has changed my life. I had severe jaw, and ear pain, loud cracking when I chewed, and sometimes my jaw would stick. This was very painful by the time I brought my concerns to Dr. Sigua. Once I received my mouth guard, within a week I was painfree. The jaw pain had progressed so slowly that as my jaw improved, I realized I had been dealing with some sort of jaw pain much longer than I had realized. Thank you, thank you...it was the best $480.0 I have ever spent!!!!!