Infrared thermography imaging has been used to diagnose a number of diseases where superficial temperature can indicate the presence of inflammation in underlying tissues or where blood flow is increased or decreased due to a clinical abnormality. Thermographic analysis can be used to determine the safe laser irradiation conditions when developing a new clinical procedure. In this talk, the basis of Infrared Thermogra-phy will be presented, and examples of measurements during laser treatment of myofascial back pain syndrome, temporomandibular disor-ders, dental cavity preparation with laser, caries prevention with lasers, laser in endodontics, periodontics, prosthodontics and implants will be presented.