Scope of Practice for Dental Hygienists and Supervision Levels
The hygiene scope
Indiana hygienists may perform dental hygiene services such as prophylaxis, scaling, polishing, and patient education within the licensed scope. They may not diagnose, treatment-plan, or perform procedures reserved to dentists. The hygienist's authority is derivative: it depends on a dentist's examination and authorization, and on the supervision level the rule assigns to the specific service and setting.
Supervision categories
- Direct supervision: the dentist is physically present in the office and has examined the patient; the dentist remains responsible.
- Indirect supervision: the dentist has examined and authorized treatment but is not physically present.
- General supervision: the dentist authorizes the service but need not be on the premises; this is limited to services and settings the board permits. The label matters: a service allowed only under direct supervision cannot be performed merely because the dentist is reachable by phone.
Worked example
A hygienist is asked to provide prophylaxis and sealants at a school clinic without a dentist on site. The first question is not whether the hygienist is competent, but whether the rule permits that service under general supervision in that setting. Prophylaxis may be permitted in limited public-health settings if the dentist has authorized it; sealants may be an expanded function with separate certification. If the setting or service requires direct supervision, the assignment is unlawful even though the hygienist is licensed.
Traps that cost marks
- Treating all supervision as interchangeable.
- Forgetting that the dentist must examine the patient before hygiene treatment in most settings.
- Assuming a hygienist may diagnose or prescribe.
- Overlooking setting-specific limits for schools, nursing homes, and public-health clinics.