Objectives. Light curing is crucial when applying composite resin restorations. Complete polymerization of the resin depends on delivering adequate light energy to it. Dental clinicians may be unaware of the importance of proper light-curing techniques. This study aimed at evaluating and comparing the level of knowledge of general practitioners (GPs) and specialists (SPs) regarding light-curing units. Materials and Methods. An electronic survey was conducted online among GPs and SPs of various specialties, working in the governmental sector in Riyadh, Saudi Arabia. Collected data were analyzed for statistical significance. Results. 310 dentists were included in the study. Nearly half of the GPs (45.9%) and more than half of SPs (56.8%) use light-emitting diode (LED) type light-curing units (LCUs). 36.9% of GPs and 29.6% of SPs were unsure about the type of LCUs they use in their dental clinics. 10.8% of GPs and 8.5% of SPs knew the proper term of the power output of LCU. 52.2% of the GPs and 55.7% of SPs were wrong about advancements in technology of LED LCUs. Regarding the use of radiometer, 48.2% of SPs and 35.1% of GPs had responded wrongly, and 37.7% of SPs and 52.3% of GPs were not familiar with the device, showing a statistical significance p = 0.040 . There was no statistical significance observed in the responses pertaining to their years of experience, expected for two questions. Conclusion. Both GPs and SPs displayed inadequate knowledge regarding the use of LCUs. Further educational programs are recommended to spread awareness about the handling of LCUs among dental clinicians.

Objective: This study aimed to evaluate the knowledge and perception of dental students and interns about Light-Curing Units (LCUs), at Princess Nourah Bint Abdulrahman University (PNU), Riyadh, KSA. Materials and Methods: The online questionnaire entailed 14 questions that were grouped under three sections: (1) Demographics, (2) LCUs and light-activated materials and (3) LCUs' maintenance, safety and disinfection. Chi-Square and ANOVA tests were used to compare the groups with a significance fixed at p ≤0.05.Results: A total of 108 dental students and interns participated in the survey.Regarding the overall knowledge among the groups, an insignificant statistical difference was found between the groups' knowledge of LCUs based on the level of education (P-value=0.231). As for the appropriate infection control methods, many have answered correctly (69.4%). Regarding the use of radiometers (50.9%) of the participants do not use radiometers in their daily practice, moreover (36.1%) were not familiar with the device. Conclusion:Our findings suggest that dental students and interns have very low overall knowledge regarding the light-curing units while demonstrating relatively high awareness toward maintenance and infection control protocols.