A Hydrogen peroxide’s low molecular weight enables it to diffuse deeply through the tooth’s organic matrix to enter the enamel and dentin.
B Hydrogen peroxide’s moderate molecular weight prevents it from diffusing deeply into tooth structures. It is the various oxygen radicals given off by hydrogen peroxide that are able to diffuse deeply through the tooth’s organic matrix and are responsible for whitening enamel and dentin.
C Hydrogen peroxide is able to penetrate enamel, however it is unable to penetrate into dentin. It is the various oxygen radicals given off by hydrogen peroxide that are able to diffuse deeply into and through dentin.
