This book 'Internal Derangement of Temporomandibular Joint' describes embryology, anatomy, and biomechanics of temporomandibular joint (TMJ) and highlights different diagnostic procedures that help in diagnosing and imaging temporomandibular joint disorders (TMD). It is meant for postgraduates and clinicians to understand the pathogenesis, non-surgical, and surgical treatment options available up to date for internal derangement of TMJ.