Scope of Practice for Dental Hygienists, Including Supervision Levels and Settings
What dental hygiene includes
Ohio law defines dental hygiene services such as prophylaxis, scaling and root planing, polishing, fluoride application, sealants, radiographs, and patient education. Additional permits are required for services like local anesthesia or nitrous oxide/oxygen analgesia, and those services remain subject to supervision and training rules.
Supervision levels
- Direct supervision: the dentist is physically present in the office or facility and has examined the patient; the dentist remains responsible for treatment.
- General supervision: the dentist authorizes the service but is not physically present; Ohio permits this only in settings and under conditions recognized by statute or rule, often with a written agreement or protocol.
- Indirect supervision may appear in rules for specific tasks; do not assume it is a free-standing authority for hygiene treatment.
Worked example
A nursing-home patient needs a prophylaxis. The hygienist has a general-supervision arrangement with a dentist and the facility qualifies under Ohio’s public-health setting rules. The hygienist confirms the dentist’s written authorization, the patient’s current status, and any exam requirement. In a private office with no dentist on the premises, the same prophylaxis would require direct supervision, so the setting changes the answer.
Traps
“General” does not mean independent practice. “Direct” is not satisfied by a dentist reachable by phone. Do not perform irreversible or diagnosis-dependent procedures outside the rule. Do not ignore the requirement that the dentist examine the patient when direct supervision applies.