This book gives a comprehensive guidance on diagnosing, managing pathology, and planning treatments. The book begins by emphasizing thorough diagnostic assessments through clinical examination, radiographic interpretation, and pulp vitality tests, aiding in accurate identification and differential diagnosis of endodontic conditions. It delves into the pathophysiology of various diseases like pulpal and periapical inflammation, trauma, and resorption, essential for effective treatment planning. This book discusses treatment planning in endodontics, highlighting individualized approaches considering factors such as pathology extent, tooth morphology, and patient preferences. The book covers a range of treatment modalities, from conventional root canal therapy to advanced techniques like regenerative endodontics and surgery, with insights into indications, advantages, and limitations.