A dental hygienist is not required to renew the Board recognition to: Administer local anesthesia; or Perform manual curettage in conjunction with scaling and root planing. A dental hygienist who has successfully completed the following since graduating from an approved school of dental hygiene may receive continuing education credit toward renewal of their dental hygiene license: The 28-hour Board-approved course of instruction for local anesthesia; The 2-hour Board-approved course of instruction in manual curettage in conjunction with scaling and root planing; and The CDCA Local Anesthesia Examination for Dental Hygienists.