Chemical burn. I use the 35% and always, always wait until 3 hours after I last brushed my teeth and dry your gums with a cotton ball and apply copious vaseline on your gums before you put your trays in. I used to have black burn marks...
sign in with Facebook
Join the world's largest cosmetic surgery community.
By creating an account, you are indicating that you have read and accept the
Enter your username or email address and we will send you a link to login.
Please create a username or use the one provided to complete your registration.