Controlling infections in dental offices is a significant challenge due to microorganisms that can bypass safety measures, risking patient and professional health. The widespread use of light therapy in dental practice necessitates adopting protective approaches to prevent cross-infection. Cross-transmission of infectious diseases is influenced by microbial species, virulence, exposure region and frequency, and factors related to patients and practitioners. Disposable barriers are marketed as a cost-effective means to prevent contamination of light tips. Proper selection of biosafety materials is crucial to avoid interfering with therapy outcomes. Polyethylene or polyvinyl chloride barriers are effective in preventing cross-contamination without compromising power output. Disinfection protocols include using 70% ethyl alcohol and replacing disposable barriers after each use.