Erbium-doped yttrium aluminum garnet, also known as an Er-YAG-laser, is a solid-state laser containing an Er-YAG crystal which emits a wavelength of 2940 nanometers. It is mainly used in bone surgery. There are two different types of erbium lasers: the ER-YAG-laser and the Er-Cr-YSGG laser. The two types differ in wavelength and water absorption however, their function and benefits are almost identical. In oral and dental applications, the Er-YAG-laser has been approved by the FDA for many different procedures. Its use has many benefits including a reduced need for local anesthesia, minimal negative effects or trauma to the surrounding tissues, and excellent rates of healing and recovery following its use. In addition, the laser has been shown to almost completely eliminate the smear layer while also disinfecting the dentin and enamel. The laser is approved for use in procedures such as biopsies, gingival contouring, periodontal and pre-prosthetic procedures, and frenectomies.