Helpful content for the Dental Hygienist National Examination. Recommended for those who have lost their materials or are just starting to study! Pathology and Oral Pathology Anatomy, Histology, and Embryology, Physiology Pharmacology Microbiology There are no noticeable scratches or stains, but there is some wear and tear as it was used during school. There are also notes and markings inside. Thank you for looking!