The myOSA for Teeth Grinders™ – TGH is specifically designed for heavy tooth grinders who may also experience symptoms of jaw joint (TMJ) disorder. The dual layer appliance, which has a hard inner core encased in a soft outer provides a firm fit and optimum retention for the upper teeth as well as additional durability to protect against severe grinding. A thickened base provides extra protection at the molar area and ensures the appliance is gentle on the jaw joints (TMJ) and suitable for people with symptoms of jaw joint (TMJ) Disorder.