Temporomandibular joint is one of the most complex yet beautifully functioning joint of our body. For more than half a century one of the most controversial fields in dentistry has been the syndrome that generally known as temporomandibular disorder. Diagnosing these disorders can be quite difficult and frequently presents a formidable challenge to even the most astute clinician. Only sound knowledge and precise diagnosis can lay the foundation for proper management. A good understanding of the anatomy and physiology of the entire stomatognathic system along with the understanding of the pathophysiology of the disorder is paramount in making the right decision regarding the treatment protocol to be followed. Optimal patient care depends on keen diagnostic acumen and thoughtful analysis of the benefits and risks of the treatment. Thus diagnostic and therapeutic decisions should be carried out in a manner that employs clinical reasoning and critical thinking. This book is a small effort to open the complex doors of diagnosing temporomandibular joint disorders.