Laser stands for LIGHT AMPLICATION BY STIMULATED EMISSION OF RADIATION.Lasers are unique and versatile in dentistry by virtue of their physical characteristics. Properties such as collimation, coherence, monochromaticity are generated in the high energy processes occurring inside the optical cavity. The lasers beam that is projected from this cavity and on to the patient’s tissues retains these characteristics. In dentistry lasers are used for caries detection, removal of caries, for bleaching the teeth and even for some surgical procedures.
The process of lasing occurs when an excited atom can be stimulated to emit a photon before the process occurs spontaneously.
Soft lasers are low level lasers producing cold thermal low energy. Wavelength of less than about 450nm with minor temperature increase of less than 0.1degree Celsius are used. These wave length stimulate circulation and cellular activity. Soft lasers which emits a light in the visible or near infrared region of the spectrum and causes various effects such as anti-inflammatory, vascular etc.
There are many types of low level lasers depending on their active media:
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