Pain is probably the most fundamental and primitive sensation. It has always been considered very important in dental practice.Over one-third of the world's population suffers from persistent or recurrent pain. Chronic pain is associated with conditions such as back injury, migraine headache, arthritis, herpes zoster, diabetic neuropathy, temporomandibular joint syndrome, and cancer. Many of the currently available pain therapies are either inadequate or cause uncomfortable to deleterious side effects. The book provides a compressive and systemic approach to the diagnosis and treatment of different Orofacial disorders.