The basis of laser cavity detection is primarily on the tooth structure as the reflection of light on a decayed tooth is different when compared to the reflection of light on a natural healthy tooth.
Laser cavity detection is a tool that is used by aiming a beam of light during an oral examination. The instrument is similar to a pen and your dentist will use this instrument to accurately check the density of your tooth structure. Depending on the examination, your dentist will determine whether tooth decay is present.