Table 1: Recommended settings for preparation of enamel, dentin and excavation of caries with Er:YAG laser (wavelength 2940 nm). The symbol + means that water and air were used.

Indication	Pulse Width	Pulse Energy	Pulse Frequency	Air/Water
Enamel preparation	VSP (SSP)	250-300 mj	30 Hz	+/+
Dentin preparation	VSP/SP	200-300 mj	10-20 Hz	+/+
Excavation dentin caries	VSP/SP	200-300 mj	20-30 Hz	+/+
Excavation deep caries	SP	150-250 mj	5-15 Hz	+/+