I have severe TMJ and have worn a dental appliance similar to a mouth guard 24/7 since 1987. Yes, you can "fix" minor issues with your appliance yourself. I use a file rather than sandpaper, but either would work. I think a file would give you more fine control than sandpaper. For me, a flat nail f...

Hi all I got a custom made mouth guard for Bruxism / Teeth Grinding at night. My dentist told me the top of the mouth guard is a little sharp and is pressing on my top gum and it needs a little adjustment so it doesn't press on my gum. She suggested I could try to fix it myself. Do you think trying ...