Need bite appliance?

I have crowns on my upper and lower front teeth because of grinding at night(which I had no idea I was until my teeth looked really bad. I have an upper partial. I need a lower partial-have all my front teeth and premolars but molars are missing. when I bite down there's no room for a partial.. I have to go to a specialist for a bite appliance. What will I have to wear? Thank you so much. P.S. Wearable bite guard at nite now.

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