Amends the Illinois Dental Practice Act. Provides that a dental hygienist may be employed or retained (rather than employed) in specified settings, including in a public health setting (and defines "public health setting"). Provides that certain orders by dentists to dental hygienists must be completed within 12 months (rather than 120 or 180 days). Allows a dental hygienist to perform certain dental hygiene services in a public health setting if the dental hygienist has entered into a written collaborative agreement with a licensed dentist. Sets requirements for the written collaborative agreements and limits the services that may be authorized. Makes other changes. Effective immediately.