This course is the third part of a three-part course sequence that prepares students for responsible positions as dental assistants. The focus in this course is on acquiring advanced dental assisting skills through externship placement and lab practice. Students will practice and perfect their chairside skills in an actual dentist's office and will meet with the instructor weekly for additional skill practice of advanced procedures. The radiology curriculum is approved by the California Board of Dental Examiners and successful completion of the entire course sequence, including HEA 147A, HEA 147B, and HEA 147C will culminate in a Dental Assisting certificate and a California Radiation Safety certificate.