I've been having this popping sound whenever I open my mouth. I don't have pain. It's becoming very annoying. I went to my dentist who suggested filling my teeth for better alignment and crowning my lower two front teeth since I have grind them so bad. It will cost me $3,000 with no guarantee. I then went to a specialized dentist in TMJ and he recommended a mouth guard that I have to wear 24/7 and take it out only to eat. That will cost me around $3,500. I don't know which one to choose. Any suggestion?