How does an Erbium:YAG laser differ from a CO2 laser?

The Erbium:YAG laser is primarily absorbed by water, which makes it effective for procedures involving tissues that contain significant amounts of water, such as the skin. This high water absorption allows the Erbium:YAG laser to cut and ablate tissue with precision while minimizing damage to surrounding areas. This attribute is particularly beneficial in dermatological procedures, resurfacing, and skin rejuvenation.

In contrast, CO2 lasers are also highly absorbed by water but operate differently, primarily focusing on vaporizing tissue. The CO2 laser is absorbed by both water and pigment, though it is generally more effective on pigmented tissues compared to the Erbium:YAG laser.

Therefore, the assertion that the Erbium:YAG laser is absorbed more by water and less by pigment accurately reflects its fundamental properties and explains its specific clinical applications.