Due to the proximity and relationship of the temporomandibular joint to the oral cavity, the dental profession has taken the lead in research of these disorders. Accurate diagnosis is however fraught with innumerable problems. This is where imaging plays a pivotal role. The goal of any imaging technique should be to evaluate the integrity and relationship of the structures when disease is suspected and to confirm the extent of the disease. The displacement of disc anterior to the condyle is known as internal derangement. The severity of internal derangement can be graded by evaluating the...