Er:YAG laser

[1] The output of an Er:YAG laser is strongly absorbed by water.

As a result, they are widely used for medical procedures in which deep penetration of tissues is not desired.

[2] Example uses include treating acne scarring, deep rhytides, and melasma.

Eliminating the vibration of the dental drill removes the risk of causing microfractures in the tooth.

When used initially at low power settings, the laser energy has a sedative effect on the nerve, resulting in the ability to subsequently increase the power without creating the sensation of pain in the tooth.