**8. Cost and safety**

Laser safety officer (LSO) is an elected, well-trained individual who guides safety of laser performs and confirms a harmless surroundings for exhausting it, as an important part of giving dental treatment with laser device is protection and safety. All clinicians must be aware and take care of the prevention of accidental and hazardous irradiation. The patient, clinician, and assistant must wear a protective eyewear particular for the wavelength and the type of laser in use. Additionally, the clinician should follow laser safety rules and join certificate courses by dental laser organizations; however the size and the cost of laser device still create a difficulty and a struggle for its practical application [77].
