A comparative study on safety standards and certification systems for dental laboratory steam cleaners: focusing on 5 major jurisdictions

Purpose:This study aimed to comparatively analyze the regulatory frameworks, conformity-assessment pathways, and safety standard structures applicable to dental laboratory steam cleaners in five major jurisdictions-Korea, the European Union, the United States, Japan, and China-and to identify document-level gaps relevant to dental laboratory environments.Materials and Methods: Designed as a document-based comparative regulatory analysis, this study reviewed official laws, certification systems, international and national safety standards, and a reported domestic accident case.The analytical framework systematically evaluated regulatory pathways, standard linkages, and whether explicit clauses addressed critical safety issues specific to dental laboratory conditions.These included combined metallic dust exposure, humidity, close-range operation, and the hazards of repeated pressurization.Results: The reviewed documents revealed two broad regulatory structures.The EU, Japan, China, and Korea utilize legal frameworks directly linked to IEC 60335 or equivalent harmonized standards, whereas the US applies productspecific safety standards within the OSHA Nationally Recognized Testing Laboratory system.Conformity assessments varied across regions, ranging from manufacturer self-declarations to mandatory third-party certifications.Notably, no explicit clauses specifically addressing repeated pressurization durability, combined dust-humidity exposure, or close-range operator protection in dental laboratories were identified in the reviewed standards.A 2023 steam-cleaner explosion in a Korean dental laboratory further highlighted these pressure-related workplace hazards.Conclusion: Although the frameworks structurally align with general electrical safety systems, application-specific provisions for dental laboratory steam cleaners remain limited.The findings strongly support the necessity for use-specific safety guidance, reinforced durability testing for pressure-related components, and clearer maintenance requirements.(