How do i know the mouth guard i use for grinding is not toxic? i feel bits of it in my throat on bad nights.

If it: Was made at a dental office more likely the materials used are ada fda approved. If that is the case you should not have any concerns about toxicity.

Sometimes: Sometimes we need Government Oversight, although less often than our politicians think. The materials used in Occlusal Orthotics, night guards custom made for you by your Dentist, are safe & non-toxic. If you have concerns, call the dentist that made the appliance for you.