The study will determine whether dentists who use a diagnostic device treat suspicious occlusal carious lesions (SOCL) surgically more often, with the same frequency, or less frequently, than dentists not relying on a diagnostic device. The study will also determine -- among those SOCLs that are opened -- whether the proportion of lesions that extend into the dentin when dentists are using a diagnostic device is more than, the same, or less than when no device is used.