NEW ACCESS CODE INCLUDED. The product is the 6th edition hardcover textbook “Darby and Walsh Dental Hygiene: Theory and Practice” published by Elsevier in 2019. Written by Jennifer A. Pieren and Cynthia C. Gadbury-Amyot, this advanced-level textbook is specifically focused on the subject area of dental hygiene. It is designed for adult and further education levels, making it a comprehensive resource for students and professionals in the field. With its detailed theory and practical applications, this textbook serves as a valuable tool for those seeking to enhance their knowledge and skills in dental hygiene.