Florissant Dentist. Dr. John Boain provides Night Guards, bite guard, grinding guard, snoring guard, bruxism, teeth guards to patients suffering from Teeth grinding, stop teeth grinding, stop snoring, worn down teeth, jaw pain, irritated gums, teeth clenching, TMJ in Hazelwood, Clayton, Creve Coeur, . Hazelwood Dentist providing Night Guards in Florissant, Missouri.