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Ab s t r Ac t Aim: To compare and assess the level of infection control provided by a cling film against a sleeve and their impact on the light intensity level of dental light-emitting diode (LED) light-curing units (LCUs). Materials and methods: A sleeve and a cling film of proprietary brands were compared on their reduction of light output and bacterial colonies on agar plates. Including a control group, 120 samples of analog radiometer readings were obtained. A total of 90 samples, including 10 each for positive and negative controls, were obtained in a laboratory setting via swabbing of light-guiding tips placed intraorally. These swabbings were inoculated on 5% sheep blood agar in a biological cabinet and cultured for 48 hours at 37°C; the inoculated surfaces were photographed and analyzed for area of coverage by bacterial colonies. The data obtained were subjected to ANOVA and Mann–Whitney U tests. Results: There is neither statistically significant reduction in output nor difference in output between either barriers (p > 0.05). There is statistically significant reduction in bacterial colonies on the inoculated surface by both barriers compared to no barrier (p < 0.01), but there is no statistically significant difference between the two barriers (p > 0.05). Conclusion: Both barriers do not significantly affect light output and are equally efficacious as cross-contamination barriers, and the choice lies with the operator. Clinical significance: Use of barriers is very important to prevent cross-infection control. The results of our study help the clinician select appropriate measures to prevent cross infection while using LCUs across the patients.

Efficacy of Infection Control Barrier on Cross Contamination and its Effect on the Intensity Variation