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HD 2440

An Act enabling registered dental hygienists to administer nitrous oxide

194th Legislature (2025-2026) Introduced by Sean Garballey and 3 co-sponsors

Massachusetts bill allows registered dental hygienists to independently administer nitrous oxide in dental procedures, potentially improving patient access while raising patient safety and professional scope questions.

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Bill Summary · HD 2440

Legislative bill overview

HD 2440 would allow registered dental hygienists in Massachusetts to independently administer nitrous oxide (laughing gas) to patients, a procedure currently restricted to dentists and physicians. The bill expands the scope of practice for dental hygienists while maintaining certain regulatory requirements and oversight.

Why is this important

Nitrous oxide administration is a common anxiety-management tool in dental procedures. Expanding who can administer it could increase patient access to dental care, reduce wait times, and lower costs by allowing hygienists to handle this task. However, this represents a meaningful shift in professional responsibilities and patient safety considerations within dental practice.

Potential points of contention

  • Patient safety and training: Questions about whether dental hygienists' current training is sufficient to manage potential complications, emergency situations, or adverse reactions to nitrous oxide administration and monitoring
  • Professional scope creep: Concerns from dentists about whether expanding hygienist duties sets precedent for further scope expansion and affects the role dentists play in patient care oversight
  • Regulatory clarity: Need for clear guidelines on supervision requirements, dosing limits, patient screening protocols, and what emergency equipment/training hygienists must maintain

Compiled from official sources — confirm details with the bill’s official record.

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