These marionette lines recently appeared after I began using the FacialFlex device. It involves putting a resistance device into the mouth and contracting to strengthen facial muscles. I used it for over one year. Is it possible that using the device strengthened my DAO muscle and caused the line. If so will the pronounced muscle eventually relax? I know the jaw gets a lot of exercise so I'm concerned the muscle will maintain it's strength. If not should I consider Botox injection into the DAO?