225 ILCS 25/50
Every dentist shall make a record of all dental work performed for each patient. The record shall be made in a manner and in sufficient detail that it may be used for identification purposes. Dental records are the property of the office in which dentistry is practiced.
Dental records required by this Section shall be maintained for 10 years. Dental records required to be maintained under this Section, or copies of those dental records, shall be made available upon request to the patient or the patient's guardian. A dentist shall be entitled to reasonable reimbursement for the cost of reproducing these records, which shall not exceed the cost allowed under Section 8-2001 of the Code of Civil Procedure. A dentist providing services through a mobile dental van or portable dental unit shall provide to the patient or the patient's parent or guardian, in writing, the dentist's name, license number, address, and information on how the patient or the patient's parent or guardian may obtain the patient's dental records, as provided by law.
225 ILCS 25/50