Scope of Dental Hygiene Practice and Supervision Levels
What the exam tests
Illinois dental hygiene practice is defined by the Dental Practice Act and Department rules. Questions test whether you can separate dental hygiene services from dentistry, identify the supervision level for a given setting, and spot when a permit is required.
Core rules
- Dental hygiene services include prophylaxis, scaling and root planing, polishing, fluoride application, sealants, radiographs, and patient education. Diagnosis, treatment planning, and prescribing remain with the dentist.
- General supervision: the dentist has examined the patient and authorized the service, but need not be on the premises. It is the usual level for routine hygiene care in a dental office.
- Direct supervision: the dentist is physically present in the office and available, and authorizes the procedure before it is performed. Local anesthesia and nitrous oxide administration by a permitted hygienist require direct supervision.
- Public health dental hygienists may provide services in specified public health settings under a collaborative agreement, with referral to a dentist.
Worked example
A nursing-home patient needs a prophylaxis. The hygienist is employed by a dental office, but the dentist is not scheduled to visit. If the hygienist is practicing as an ordinary dental hygienist, the dentist must have examined the patient and authorized the service; general supervision may allow the hygienist to proceed without the dentist on site. If the hygienist is a public health dental hygienist working under a collaborative agreement in a covered setting, the agreement and referral rules control. The hygienist does not diagnose or prescribe.
Traps
- Treating “general supervision” as no dentist involvement at all.
- Administering local anesthesia without a current permit.
- Assuming a procedure is delegable because an assistant or another state allows it.