This book titled 'Risk Factors in Periodontal Disease' will serve as a useful guide to various graduate and post graduate students to understand the concept of Risk Factors and their association with periodontal disease. The authors have classified and elaborated all the risk factors, risk indicators risk markers and risk determinants in detail and their association with periodontal disease. A section on risk assessment has also been added in order to help dentists identify and evaluate various risk factors in patients in clinical practice.