Dental functional diagnostics determine the functional state of all structures within the masticatory system. They provide a specific diagnosis for patients with functional disorders. Every patient who is about to undergo dental or orthodontic treatment requires this kind of diagnostics – even those who seem to be functionally sound.
Farbatlanten der Zahnmedizin (Color Atlas of Dental Medicine),
Bd. 12, Thieme Publishers
TMD occurs in about 8% of the general population, but only about 3% require treatment due to this condition. TMD symptoms seldom manifest in young children, but their frequency increases up until puberty. Women of child-bearing age are affected significantly more frequently than men, as they are by other pain conditions.
Source: Wikipedia (accessed: 27 November 2015, 11:12 UTC)