Book excerpt: This comprehensive text describes the aspects of gingival and periodontal diseases the dental hygienist will encounter in practice. Periodontology for the Dental Hygienist contains the latest information about assessment and treatment of the diseases. It includes background information to provide context in epidemiology. Also included is information about the healthy state, host response, and dental plaque. Common periodontal surgical procedures are described, providing an introduction to periodontal surgery and the role of the dental hygienist. It also includes the rationale and procedures required for periodontal care and the maintenance of implants. This second edition provides a full color supplement of the book's major illustrations for a realistic understanding of gingival and periodontal diseases and their treatments.