Which class of lasers is used in dentistry for bacterial decontamination?

Class 4 lasers are utilized in dentistry for bacterial decontamination due to their high power output, which can effectively penetrate tissues and eliminate bacteria. These lasers produce energy in the form of light that can be absorbed by water and pigments in biological tissues, enabling them to reach a deeper penetration level compared to lower classes of lasers. This capability allows for efficient elimination of pathogenic bacteria during procedures such as periodontal therapy, thus promoting healing and reducing the risk of infection.

In contrast, Class 1 lasers are considered safe for general use with minimal risk, primarily utilized in applications where tissue interaction is not a focus. Class 2 lasers are low-power devices suitable for applications like aiming or low-level therapies that do not have significant bacterial decontamination effects. Class 3 lasers also have limited penetration and power compared to Class 4, making them less effective for therapeutic procedures requiring bacterial decontamination. Therefore, Class 4 lasers stand out as the appropriate choice for achieving effective bacterial control in dental practices.