Although commonly used to protect an athlete's teeth during contact sports, mouthguards
are now being questioned for their potential to injure a player's
mouth, and possibly to even cause exercise-induced asthma and allergies. A new
study finds that mouth-guards
may increase the number and intensity of mouth cuts and abrasions,
exposing an athlete to an increased chance of infection due to the
bacteria, yeast, and fungi they collect. Replacement every 14 days, or earlier if the mouthguard develops sharp or jagged edges, is now recommended.