Imaging diagnosis and pathological basis of temporomandibular disorders

a)	With the development of imaging techniques, more and more imaging examination methods, including conventional radiography, arthrography, digital subtraction arthrography, CT and MRI, could be used in TMD clinics. In the diagnosis and differential diagnosis of TMD, imaging diagnosis is very important and necessary. However, the clinician should individually choose the most suitable imaging examination method for TMD patients with different conditions.
b)	Different imaging changes of condyle and disc of patients with TMD were described in this study. The mechanism of joint click and of chronic microtrauma in the joints of patients with TMD was also discussed.
c)	The pathologic findings of the condyle and meniscus from patients with TMD were degenerative changes according to our previous research using light and electronic microscopic investigations.