When prescribing more than a 3-day supply of a schedule II or III controlled substance for pain management, a dentist must do which of the following?

When a dentist prescribes more than a 3-day supply of a schedule II or III controlled substance for pain management, documenting justification in the patient's record is crucial. This requirement serves to ensure that the dentist has a clear rationale for prescribing what can be potent and potentially addictive medications. Proper documentation helps maintain a comprehensive patient record, which is vital for ongoing patient care and for meeting legal and regulatory standards.

This documentation not only reflects the dentist's decision-making process but also provides a safeguard against potential allegations of over-prescribing or inappropriate prescribing practices. It allows for continuity of care, as subsequent healthcare providers can review the rationale behind the treatment decisions if necessary.

In contrast, the other options do not directly address the legal or ethical obligations around prescribing controlled substances. Special permission from the patient is not legally required to provide a longer prescription, while the necessity of physical examinations or consultations with other dentists may depend on specific circumstances but are not universally mandated for the justification of prescribing in this context.