New research regarding the changing nature of dental caries. Recent reports regarding the inadequacy of current caries diagnostic methods. New laser protocol for diagnosis, detection and monitoring of dental caries. Quantifying carious lesions rather than subjectively recording possible carious involvement. Scientific basis for Diagnodent laser utilization. Understand the quantified digital numeric output readings of the Diagnodent and how they correlate to actual carious involvement. Reliability and reproducibility of Diagnodent laser readings compared with conventional visual and tactile modalities. Correlates Diagnodent numeric readouts with recommended treatment protocols.