About 7,000 of Harrington's patients from the past six years are being urged to get tested. Saturday's clinic will treat patients on a walk-in basis. It will be operational for 10 hours a day starting Monday.
About 1,000 people called a hotline Friday to inquire about screenings, Tulsa health department spokeswoman Kaitlin Snider said.
Harrington surrendered his dental license on March 20 after health investigators found sterilization and staffing infractions.