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In January 2020, the causal pathogen was classified to be severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), and in February 2020, World Health Organization (WHO) has named the disease associated with it COVID-19. 3,4 In March 2020, WHO has declared COVID-19 a controllable epidemic, and the COVID-19 pandemic affected not only the public health of

This paper aimed to develop an IoT-based X-ray educational simulator (IoT-based dental education and learning: IDEAL) and establish a dental X-ray education system that allows students in dentistry colleges or dental hygiene departments to obtain a quality education without radiation exposure. A simulator that has a shape and operating motion range similar to those of intraoral x-ray machines widely used in clinical settings were created. Angle sensors were installed inside the cone and detector to enable the user to monitor rotation angles in these areas. Information regarding measured angles was sent to servers through wired telecommunications or a network, and it was analyzed and used as evidence to determine whether the user placed the patient in a suitable posture and position to take X-ray images. This paper demonstrated that this dental X-ray simulator can provide safe X-ray practical training without the risk of radiation exposure and that it can be used in many dental hygiene education settings in the future.