I no longer wear a splint full time, but have had my back teeth built up to hold my resting jaw in place, and have a normal stop to a bite/chew! I need the build up to be permanent, which is what I'm working on now (crowns?) I also had to have both TMJs fixed in surgery (due to accident which led to my TMD.)
Don't put this off, long term bruxism due to stress can wear on your joints themselves and make it so you need surgery.