The hard acrylic night guard is the most commonly used appliance to treat TMJ. It is a custom-fit appliance that fits over your upper or lower teeth at night. It has a smooth flat surface that allows your opposing teeth to move smoothly. This night guard prevents your teeth from locking together, which in turn reduces the stress and pressure on your teeth and joints. Over time this appliance can reduce the tendency to clench and grind your teeth as well.
The hard night guard is much more durable. It’s made from acrylic, a clear, hard plastic material. The hard night guard is suitable for people who suffer for heavy to severe teeth grinding. Note that the acrylic night guard differs from an acrylic bite splint. While a regular night guard protects against teeth grinding, the acrylic bite splint is prescribed to a patient to address a TMJ dysfunction. An acrylic bite splint should be obtained directly from the dentist.