Endodontic and periodontal lesions can manifest identical symptoms despite originating from separate pathogens, and traditional classification has reinforced etiological imprecision in both diagnosis and treatment .Supported by a thorough analysis of the diagnostic, etiopathogenic, and clinical factors, this succinct book proposes a concise list of classifications used pertaining to endo-periodontal lesions that shed light on an ambiguous pathologic situation that is often misinterpreted in clinical practice. Step-by-step, the reader is guided through a systematic differential diagnosis that determine how to proceed with appropriate treatment. This book presents an interdisciplinary approach to treatment planning as well as predictable clinical protocols to ensure success in treatment and also illustrate the close connection between the dental pulp and the periodontium and shows the variety of clinical situations in which this dual-natured pathology can be present. The unique feature of this book is to clarify diagnosis and treatment of endo-periodontal lesions amongst all dental practitioners.