Which factor influences the depth of laser penetration in tissues?

The wavelength of the laser light is a critical factor that influences the depth of laser penetration in tissues. Different wavelengths interact with biological tissues in various ways, primarily due to the absorption characteristics of water, hemoglobin, and other chromophores present in the tissues.

For instance, shorter wavelengths tend to be absorbed more efficiently by superficial tissues, while longer wavelengths can penetrate deeper before being absorbed. This phenomenon allows practitioners to select an appropriate laser wavelength based on the type of tissue being treated and the desired therapeutic effect.

Understanding this relationship between wavelength and tissue interaction is essential for effective laser therapy, as it determines not only how deeply the laser will penetrate but also how effectively it can stimulate healing or other physiological responses.