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This book provides dental hygiene professionals with essential scientific and clinical knowledge for preventing and treating periodontal disease. It details the pathogenesis of periodontal disease, covering vital concepts in immunology, genetics, and the destruction and repair of periodontal tissues. The text highlights innovations and new scientific evidence, suggesting new approaches to etiology, diagnosis, and treatment. It emphasizes the crucial links between oral health and general systemic health, integrating these associations into risk assessment and treatment strategies.