Which agency regularly inspects dental offices for compliance with safety standards?

The correct answer is OSHA (Occupational Safety and Health Administration) because this agency is primarily responsible for ensuring workplace safety and health standards across various industries, including healthcare settings like dental offices. OSHA enforces regulations that protect employees from hazards that could arise in their work environment, which encompasses both physical and health-related safety measures.

In the context of dental offices, OSHA inspects these facilities to ensure compliance with standards related to occupational exposure to bloodborne pathogens, hazardous chemicals, and overall working conditions. They set guidelines that dental professionals must follow to maintain a safe working environment for both employees and patients.

While other agencies mentioned have important roles in public health and safety, they don't typically conduct inspections of dental offices in the same way OSHA does. The FDA focuses on the safety and efficacy of food and drug products, the CDC provides guidelines and recommendations for public health, and DEHNR generally deals with environmental health matters. Their involvement with dental practices tends to be more indirect and advisory rather than based on direct compliance inspections like those performed by OSHA.